Abstract
A new knotweed hybrid originating from the crossing of Fallopia compacta and F. sachalinensis is described based on plant material collected in the Moravia region in the Czech Republic as F. ×moravica. In addition to the Czech Republic, the hybrid has also been reported previously from the United Kingdom and New Zealand; however, it was not distinguished from F. ×bohemica, a hybrid between F. japonica and F. sachalinensis, since its one parent (F. compacta) has been generally treated only as a variety of F. japonica. F. ×moravica differs from the morphologically most similar hexaploid (2n = 6x = 66) F. ×bohemica by its tetraploid (2n = 4x = 44) number of chromosomes and by the constant absence of purple spots on stem internodes (which are usually present in F. ×bohemica). The new hybrid also differs from F. ×bohemica as well as other European Fallopia members by its unique relative genome size. Other potential morphological and cytological differences of F. ×moravica from the related F. ×bohemica are discussed.
References
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Adanson, M. (1763) Families des plantes, vol. 2. Vincent, Paris, 640 pp. https://doi.org/10.5962/bhl.title.271</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Alberternst, B. & Böhmer, H.J. (2011) NOBANIS – Invasive alien species fact sheet – Fallopia japonica. In: European Network on Invasive Alien Species (NOBANIS) Online database of the European network on invasive alien species. Available from: https://www.nobanis.org/globalassets/speciesinfo/r/reynoutria-japonica/reynoutria_japonica4.pdf (accessed 11 April 2017). </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bailey, J.P. (1988) Putative Reynoutria japonica Houtt. × Fallopia baldschuanica (Regel) Holub hybrids discovered in Britain. Watsonia 7: 163–164.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bailey, J.P. (1989) Cytology and breeding behaviour of giant alien Polygonum species in Britain. PhD thesis, University of Leicester, Leicester, 380 pp.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bailey, J.P. (2001) Fallopia ×conollyana the railway-yard knotweed. Watsonia 23: 539–541.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bailey, J.P. (2003) Japanese knotweed s.l. at home and abroad. In: Child, L.E., Brock, J.H., Brundu, G., Prach, K., Pyšek, P., Wade, P.M. & Williamson, M, (eds.) Plant invasions: ecological threats and management solutions. Backhuys Publishers, Leiden, pp. 183–196.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bailey, J.P. (2013) The Japanese knotweed invasion viewed as a vast unintentional hybridisation experiment. Heredity 110: 105–110. https://doi.org/10.1038/hdy.2012.98</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bailey, J.P., Bímová, K. & Mandák, B. (2007) The potential role of polyploidy and hybridisation in the further evolution of the highly invasive Fallopia taxa in Europe. Ecological Research 22: 920–928. https://doi.org/10.1007/s11284-007-0419-3</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bailey, J.P., Bímová, K. & Mandák, B. (2009) Asexual spread versus sexual reproduction and evolution in Japanese knotweed s.l. sets the stage for the “Battle of the clones”. Biological Invasions 11: 1189–1203. https://doi.org/ 10.1007/s10530-008-9381-4</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bailey, J.P., Child, L.E. & Conolly, A.P. (1996) A survey of the distribution of Fallopia × bohemica (Chrtek & Chrtková) J. Bailey (Polygonaceae) in the British Isles. Watsonia 21: 187–198.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bailey, J.P. & Stace, C.A. (1992) Chromosome number, morphology, pairing, and DNA values of species and hybrids in the genus Fallopia (Polygonaceae). Plant Systematics and Evolution 180: 29–52. https://doi.org/10.1007/BF00940396</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bailey, J.P. & Wisskirchen, R. (2006) The distribution and origins of Fallopia ×bohemica (Polygonaceae) in Europe. Nordic Journal of Botany 24: 173–199. https://doi.org/10.1111/j.1756-1051.2004.tb00832.x </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Balant, M. (2015) Potencialno invazivni vrsti Fallopia baldschuanica in Fallopia multiflora v Sloveniji. Msc thesis, Biotehniška fakulteta Univerza v Ljubljani, Ljubjana, 95 pp.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Balogh, L. (2008) Japanese, giant and Bohemian knotweed (Fallopia japonica (Houtt.) Ronse Decr., F. sachalinensis (Frdr. Schmidt) Ronse Decr. and F. ×bohemica (Chrtek et Chrtková) J. P. Bailey). In: Botta-Dukát, Z. & Balogh, L. (eds.) The most important invasive plants in Hungary. Institute of Ecology and Botany, Hungarian Academy of Sciences, Vácrátót, pp. 13–33.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Beerling, D.J., Bailey, J.P. & Conolly, A.P. (1994) Fallopia japonica (Houtt.) Ronse Decraene. Journal of Ecology 82: 959–979. https://doi.org/10.2307/2261459</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Beringen, R., Leuven, R.S.E.W., Odé, B., Verhofstad, M. & van Valkenburg, J.L.C.H. (2019) Risk assessment of four Asian knotweeds in Europe. FLORON report 2018.049.e1. FLORON, Nijmegen, pp. 1–113.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bímová, K., Mandák, B. & Pyšek, P. (2001) Experimental control of Reynoutria congeners: a comparative study of a hybrid and its parents. In: Brundu, G., Brock, J., Camarda, I., Child, L. & Wade, M. (Eds.) Plant Invasions: Species Ecology and Ecosystem Management. Backhuys, Leiden, pp. 283–290.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bímová, K., Mandák, B. & Pyšek, P. (2003) Experimental study of vegetative regeneration in four invasive Reynoutria taxa (Polygonaceae). Plant Ecology 166: 1–11. https://doi.org/10.1023/A:1023299101998 </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bzdega, K., Janiak, A., Ksi??czyk, T., Lewandowska, A., Gancarek, M., Sliwinska, E. & Tokarska-Guzik, B. (2016) A survey of genetic variation and genome evolution within the invasive Fallopia complex. PLoS ONE 11 (8): e0161854. https://doi.org/10.1371/journal.pone.0161854</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Chrtek, J. & Chrtková, M. (1983) Reynoutria ×bohemica, nový k?íženec z ?eledi rdesnovitých. ?asopis Národního Muzea v Praze, ?ada P?írodov?dná 152 (2): 120. </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Conolly, A.P. (2001) Japanese knotweeds in Australia. BSBI News 87: 74–75. </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Cunningham, A. (1838) Florae insularum Novae Zelandiae precursor; or a specimen of the botany of the Islands of New Zealand. Annals of Natural History 1: 455–462. https://doi.org/10.1080/00222933809496630</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Desjardins, S.D. (2015) Evolutionary studies in subtribe Reynoutriineae (Polygonaceae). PhD thesis, University of Leicester, Leicester.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Desjardins, S.T., Pashley, C.H. & Bailey, J.P. (2022) A taxonomic, cytological and genetic survey of Japanese knotweeds s.l. in New Zealand indicates multiple secondary introductions from Europe and a direct introduction from Japan. New Zealand Journal of Botany: 1–18. https://doi.org/10.1080/0028825X.2022.2090848</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Duistermaat, H., Soes, D.M., van Valkenburg, J., van Heuven, B.J., Zonneveld, B. & Kessler, P.J.A. (2012) Actuele verspreiding en risico’s van mannelijk fertiele Fallopia japonica (Polygonaceae) planten. NCB Naturalis, Leiden. </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Galasso, G., Banfi, E., De Mattia, F., Grassi, F., Sgorbati, S. & Labra, M. (2009) Molecular phylogeny of Polygonum L. s.l. (Polygonoideae, Polygonaceae), focusing on European taxa: preliminary results and systematic considerations based on rbcL plastidial sequence data. Atti della Società Italiana di Scienze Naturali e del Museo Civico di Storia Naturale di Milano 150: 113–148.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Gillies, S., Clements, D.R. & Grenz, J. (2016) Knotweed (Fallopia spp.) invasion of North America utilizes hybridization, epigenetics, seed dispersal (unexpectedly), and an arsenal of physiological weapons. Invasive Plant Science and Management 9: 71–80. https://doi.org/10.1614/IPSM-D-15-00039.1 </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Greilhuber, J., Doležel, J., Lysák, M.A. & Bennett, M.D. (2005) The origin, evolution and proposed stabilization of the terms ‘Genome size’ and ‘C-value’ to describe nuclear DNA contents. Annals of Botany (Oxford) 95: 255–260. https://doi.org/10.1093/aob/mci019 </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Groom, Q. (2011) Reynoutria compacta. In: Verloove, F. (Ed.) Manual of the Alien Plants of Belgium. Botanic Garden Meise, Meise. Available from: https://alienplantsbelgium.myspecies.info/content/reynoutria-compacta (accessed 30 August 2021).</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Gu?uleac, M. (1952) Addenda diagnoses plantarum novarum in tomo I Florae R.P.R. commemoratarum. In: S?vulescu, T. (Ed.) Flora Republicii populare Române I. Academia Reipublicii populare Române, Bucure?ti, pp. 633–645.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Haraldson, K. (1978) Anatomy and taxonomy in Polygonaceae subfam. Polygonoideae Meisn. emend. Jaretzky. Symbolae Botanicae Upsalienses; Arbeten Fran Botaniska Institutionen i Uppsala. Uppsala 22 (2): 1–95.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Hlavá?ek, R., Mandák, B. & Pyšek, P. (1996) N?kolik poznámek k nálezu Reynoutria japonica var. compacta v ?eské republice. Zprávy ?eské Botanické Spole?nosti 31: 167–171.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Hollingsworth, M.L. & Bailey, J.P. (2000) Hybridisation and clonal diversity in some introduced Fallopia species (Polygonaceae). Watsonia 23: 111–121.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Holm, A.-L., Elameen, A., Oliver, B.W., Brandsæter, L.O., Fløistad, I.S. & Brurberg, M.B. (2018) Low genetic variation of invasive Fallopia spp. in their northernmost European distribution range. Ecology and Evolution 8: 755–764. https://doi.org/10.1002/ece3.3703</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Holub, J. (1971) Fallopia Adans. 1763 instead of Bilderdykia Dum. 1827. Folia Geobotanica et Phytotaxonomica 6: 171–177. https://doi.org/10.1007/BF02851760</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Honda, M. (1932) Nuntia ad floram Japoniae XIX. The Botanical Magazine, Tokyo 46: 675–678. https://doi.org/10.15281/jplantres1887.46.675 </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Hooker, J.D. (1880) Plants of the Royal Gardens of Kew. Curtis’s Botanical Magazine 106: t. 6476.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Houttuyn, M. (1777) Natuurlijke Historie, part 2, fasc. 8. De Erven van F. Houttuyn, Amsterdam, 784 pp.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Keil, P. & Fuchs, R. (2019) Ein Vorkommen von Fallopia ×conollyana (Polygonaceae) in Essen (Nordrhein-Westfalen). Floristische Rundbriefe 53: 2–11. </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Kim, J.Y. & Park, C.W. (2000) Morphological and chromosomal variation in Fallopia section Reynoutria (Polygonaceae) in Korea. Brittonia 52: 34–48. https://doi.org/10.2307/2666492 </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Lavoie, C. (2017) The impact of invasive knotweed species (Reynoutria spp.) on the environment: review and research perspectives. Biological Invasions 19: 2319–2337. https://doi.org/10.1007/s10530-017-1444-y</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Linnaeus, C. (1753) Species plantarum, vols. 1–2. Impensis Laurentii Salvi, Holmiae [Stockholm], 1200 pp.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Linnaeus, C. (1762) Species plantarum, ed. 2, vol. 1. Impensis Laurentii Salvii, Holmiae, [Stockholm], 784 pp.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Loos, G.H. (2010) Taxonomische Neukombinationen zur Flora Mittel- und Osteuropas, insbesondere Nordrhein-Westfalens. Jahrbuch des Bochumer Botanischen Vereins 1: 114–133.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Löve, Á. (1970) Emendations in the Icelandic Flora. Taxon 19: 298–302. https://doi.org/10.2307/1217990 </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Makino, T. (1928) A contribution to the knowledge of the flora of Japan. Journal of Japanese Botany 5: 1–48.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Mandák, B. & Pyšek, P. (2019) Reynoutria Houtt. – k?ídlatka. In: Kaplan, Z., Danihelka, J., Chrtek, J.Jr., Kirschner, J., Kubát, K., Štech, M. & Št?pánek, J. (Eds.) Klí? ke kv?ten? ?eské republiky, Ed. 2. Academia, Praha, pp. 688–690.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Mandák, B., Bímová, K., Pyšek, P., Št?pánek, J. & Pla?ková, I. (2005) Isoenzyme diversity in Reynoutria (Polygonaceae) taxa: escape from sterility by hybridization. Plant Systematics and Evolution 253: 219–230. https://doi.org/10.1007/s00606-005-0316-6</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Mandák, B., Pyšek, P., Lysák, M., Suda, J., Krahulcová, A. & Bímová, K. (2003) Variation in DNA-ploidy levels of Reynoutria taxa in the Czech Republic. Annals of Botany 92: 265–272. https://doi.org/10.1093/aob/mcg141</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Maximowicz, C.J. (1859) Primitiae florae Amurensis, versuch einer flora des Amur-Landes. Mémoires présentés a l‘Académie Impériale des sciences de St.-Pétersbourg par divers savants et lus dans ses assemblées 9: 1–504.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Meisner, C.F. (1841a) Plantarum vascularium genera, part 1. Libraria Weidmannia, Lipsiae [Leipzig], 442 pp. https://doi.org/10.5962/bhl.title.44043 </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Meisner, C.F. (1841b) Plantarum vascularium genera, part 2. Libraria Weidmannia, Lipsiae [Leipzig], 402 pp. https://doi.org/10.5962/bhl.title.44043 </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Mere?a, P.Jr., Koláriková, Z. & Hodálová, I. (2019a) Cytological and morphological variation of Fallopia sect. Reynoutria taxa (Polygonaceae) in the Krivánska Malá Fatra Mountains (Slovakia). Biologia (Bratislava) 74: 215–236. https://doi.org/10.2478/s11756-018-00168-w</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Mere?a, P.Jr., Majerová, M., Somlyay, L., Pekárik, L. & Hodálová, I. (2019b) Genome size variation in the Western Carpathian Sesleria (Poaceae) species. Plant Systematics and Evolution 305: 845–864. https://doi.org/10.1007/s00606-019-01622-1 </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Moravcová, L., Pyšek, P., Jarošik, V. & Zákravský, P. (2011) Potential phssssesytotoxic and shading effects of invasive Fallopia (Polygonaceae) taxa on the germination of native dominant species. NeoBiota 9: 31–47. https://doi.org/10.3897/neobiota.9.1266</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Murín, A. (1960) Substitution of cellophane for glass covers to facilitate preparation of permanent squashes and smears. Stain Technology 35: 351–353.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Murray, J.A. (1784) Caroli a Linneì equitis Systema vegetabilium etc., Ed. 14. Typis et impensis Jo. Christ. Dieterich, Gottingae, 987 pp. https://doi.org/10.5962/bhl.title.549</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Park, Ch.-W., Bhandari, G.S., Won, H., Park, J.H. & Park, D.S. (2018) Polyploidy and introgression in invasive giant knotweed (Fallopia sachalinensis) during the colonization of remote volcanic islands. Scientific Reports 8: 16021. https://doi.org/10.1038/s41598-018-34025-2 </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Pashley, C.H. (2003) The use of molecular markers in the study of the origin and evolution of Japanese knotweed sensu lato. PhD thesis, University of Leicester, Leicester, 344 pp.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Pashley, C.H., Bailey, J.P. & Ferris, C. (2007) Clonal diversity in British populations of the alien invasive giant knotweed, Fallopia sachalinensis (F. Schmidt) Ronse Decraene, in the context of European and Japanese plants. Watsonia 26: 359–371.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Pyšek, P., Brock, J.H., Bímová, K., Mandák, B., Jarošík, V., Koukolíková, I., Pergl, J. & Št?pánek, J. (2003) Vegetative regeneration in ivasive Reynoutria (Polygonaceae) taxa: the determination of invasibility at the genotype level. American Journal of Botany 90: 1487–1495. https://doi.org/10.3732/ajb.90.10.1487</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Richardson, D.M., Pyšek, P., Rejmánek, M., Barbour, M.G., Panetta, D.F. & West, C.J. (2000) Naturalization and invasion of alien plants: concepts and definitions. Diversity and Distributions 6: 93–107. https://doi.org/10.1046/j.1472-4642.2000.00083.x</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Regel, E. (1884) Descriptiones plantarum novarum et minus cognitarum, fasc. IX. B. Descriptiones et emendationes plantarum bucharicarum turkestanicarumque. Trudy Imperatorskago S.-Peterburgskago Botaniceskago Sada [Acta Horti Petropolitani] 8: 645–702 + 21 figs.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Ronse Decraene, L.-P. & Akeroyd, J.R. (1988) Generic limits in Polygonum and related genera (Polygonaceae) on the basis of floral characters. Botanical Journal of the Linnean Society 98: 321–371. https://doi.org/10.1111/j.1095-8339.1988.tb01706.x </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Saad, L., Tiébré, M.-S., Hardy, O.J., Mahy, G. & Vanderhoeven, S. (2011) Patterns of hybridization and hybrid survival in the invasive alien Fallopia complex (Polygonaceae). Plant Ecology Evolution 114: 12–18. https://doi.org/10.5091/plecevo.2011.444</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Schönswetter, P., Suda, J., Popp, M., Weiss-Schneeweiss, H. & Brochmann, C. (2007) Circumpolar phylogeography of Juncus biglumis (Juncaceae) inferred from AFLP fingerprints, cpDNA sequences, nuclear DNA content and chromosome numbers. Molecular Phylogenetics and Evolution 42: 92–103. https://doi.org/10.1016/j.ympev.2006.06.016 </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Schuster, T.M., Wilson, K.L. & Kron, K.A. (2011) Phylogenetic relationships of Muehlenbeckia, Fallopia, and Reynoutria (Polygonaceae) investigated with chloroplast and nuclear sequence data. International Journal of Plant Sciences 172: 1053–1066. https://doi.org/10.1086/661293</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Sell, P. & Murrell, G. (2018) Flora of Great Britain and Ireland. Volume 1. Lycopodiaceae – Salicaceae. Cambridge University Press, Cambridge, 787 pp.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Shimoda, M. & Yamasaki, N. (2016) Fallopia japonica (Japanese Knotweed) in Japan: why is it not a pest for Japanese people? In: Box, E.O. (Ed.) Vegetation structure and function at multiple spatial, temporal and conceptual scales. Geobotany Studies. Springer, Cham, pp. 447–473. https://doi.org/10.1007/978-3-319-21452-8_20 </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Stace, C.A. & Crawley, M.J. (2015) Alien Plants. William Collins, London, 626 pp.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Stalažs, A. (2022) The first findings of invasive Reynoutria ×bohemica Chrtek & Chrtková (Polygonaceae) in Latvia. Botany Letters 169: 119–126. https://doi.org/10.1080/23818107.2021.1981438</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Suda, J., Trávní?ek, P., Mandák, B. & Berchová-Bímová, K. (2010) Genome size as a marker for identifying the invasive alien taxa in Fallopia section Reynoutria. Preslia 82: 97–106.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Šípošová, H. (2016) Reynoutria Houtt. Krídlatka (pohánkovec). In: Goliašová, K. & Michalková, E. (Eds.) Flóra Slovenska VI/4. Veda, Bratislava, pp. 485–497.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Tiébré, M.-S., Bizoux, J.P., Hardy, O.J., Bailey, J.P. & Mahy, G. (2007a) Hybridization and morphogenetic variation in the invasive alien Fallopia (Polygonaceae) complex in Belgium. American Journal of Botany 94: 1900–1910. https://doi.org/10.3732/ajb.94.11.1900 </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Tiébré, M.S., Vanderhoeven, S., Saad, L. & Mahy, G. (2007b) Hybridization and sexual reproduction in the invasive alien Fallopia (Polygonaceae) complex in Belgium. Annals of Botany (Oxford) 99: 193–203. https://doi.org/10.1093/aob/mcl242</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Tison, J.M., Abdulhak, S., Bock, B., Boudrie, M., Fridlender, A., Roccia, A., Van Es, J. & Véla, E. (2021) Combinaisons nouvelles requises dans la seconde édition de Flora Gallica. Evaxiana 8: 220–225.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Yonekura, K. & Ohashi, H. (1997) New combinations of East Asian species of Polygonum s.l. Journal of Japanese Botany 72: 154–161.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Alberternst, B. & Böhmer, H.J. (2011) NOBANIS – Invasive alien species fact sheet – Fallopia japonica. In: European Network on Invasive Alien Species (NOBANIS) Online database of the European network on invasive alien species. Available from: https://www.nobanis.org/globalassets/speciesinfo/r/reynoutria-japonica/reynoutria_japonica4.pdf (accessed 11 April 2017). </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bailey, J.P. (1988) Putative Reynoutria japonica Houtt. × Fallopia baldschuanica (Regel) Holub hybrids discovered in Britain. Watsonia 7: 163–164.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bailey, J.P. (1989) Cytology and breeding behaviour of giant alien Polygonum species in Britain. PhD thesis, University of Leicester, Leicester, 380 pp.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bailey, J.P. (2001) Fallopia ×conollyana the railway-yard knotweed. Watsonia 23: 539–541.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bailey, J.P. (2003) Japanese knotweed s.l. at home and abroad. In: Child, L.E., Brock, J.H., Brundu, G., Prach, K., Pyšek, P., Wade, P.M. & Williamson, M, (eds.) Plant invasions: ecological threats and management solutions. Backhuys Publishers, Leiden, pp. 183–196.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bailey, J.P. (2013) The Japanese knotweed invasion viewed as a vast unintentional hybridisation experiment. Heredity 110: 105–110. https://doi.org/10.1038/hdy.2012.98</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bailey, J.P., Bímová, K. & Mandák, B. (2007) The potential role of polyploidy and hybridisation in the further evolution of the highly invasive Fallopia taxa in Europe. Ecological Research 22: 920–928. https://doi.org/10.1007/s11284-007-0419-3</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bailey, J.P., Bímová, K. & Mandák, B. (2009) Asexual spread versus sexual reproduction and evolution in Japanese knotweed s.l. sets the stage for the “Battle of the clones”. Biological Invasions 11: 1189–1203. https://doi.org/ 10.1007/s10530-008-9381-4</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bailey, J.P., Child, L.E. & Conolly, A.P. (1996) A survey of the distribution of Fallopia × bohemica (Chrtek & Chrtková) J. Bailey (Polygonaceae) in the British Isles. Watsonia 21: 187–198.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bailey, J.P. & Stace, C.A. (1992) Chromosome number, morphology, pairing, and DNA values of species and hybrids in the genus Fallopia (Polygonaceae). Plant Systematics and Evolution 180: 29–52. https://doi.org/10.1007/BF00940396</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bailey, J.P. & Wisskirchen, R. (2006) The distribution and origins of Fallopia ×bohemica (Polygonaceae) in Europe. Nordic Journal of Botany 24: 173–199. https://doi.org/10.1111/j.1756-1051.2004.tb00832.x </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Balant, M. (2015) Potencialno invazivni vrsti Fallopia baldschuanica in Fallopia multiflora v Sloveniji. Msc thesis, Biotehniška fakulteta Univerza v Ljubljani, Ljubjana, 95 pp.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Balogh, L. (2008) Japanese, giant and Bohemian knotweed (Fallopia japonica (Houtt.) Ronse Decr., F. sachalinensis (Frdr. Schmidt) Ronse Decr. and F. ×bohemica (Chrtek et Chrtková) J. P. Bailey). In: Botta-Dukát, Z. & Balogh, L. (eds.) The most important invasive plants in Hungary. Institute of Ecology and Botany, Hungarian Academy of Sciences, Vácrátót, pp. 13–33.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Beerling, D.J., Bailey, J.P. & Conolly, A.P. (1994) Fallopia japonica (Houtt.) Ronse Decraene. Journal of Ecology 82: 959–979. https://doi.org/10.2307/2261459</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Beringen, R., Leuven, R.S.E.W., Odé, B., Verhofstad, M. & van Valkenburg, J.L.C.H. (2019) Risk assessment of four Asian knotweeds in Europe. FLORON report 2018.049.e1. FLORON, Nijmegen, pp. 1–113.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bímová, K., Mandák, B. & Pyšek, P. (2001) Experimental control of Reynoutria congeners: a comparative study of a hybrid and its parents. In: Brundu, G., Brock, J., Camarda, I., Child, L. & Wade, M. (Eds.) Plant Invasions: Species Ecology and Ecosystem Management. Backhuys, Leiden, pp. 283–290.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bímová, K., Mandák, B. & Pyšek, P. (2003) Experimental study of vegetative regeneration in four invasive Reynoutria taxa (Polygonaceae). Plant Ecology 166: 1–11. https://doi.org/10.1023/A:1023299101998 </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bzdega, K., Janiak, A., Ksi??czyk, T., Lewandowska, A., Gancarek, M., Sliwinska, E. & Tokarska-Guzik, B. (2016) A survey of genetic variation and genome evolution within the invasive Fallopia complex. PLoS ONE 11 (8): e0161854. https://doi.org/10.1371/journal.pone.0161854</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Chrtek, J. & Chrtková, M. (1983) Reynoutria ×bohemica, nový k?íženec z ?eledi rdesnovitých. ?asopis Národního Muzea v Praze, ?ada P?írodov?dná 152 (2): 120. </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Conolly, A.P. (2001) Japanese knotweeds in Australia. BSBI News 87: 74–75. </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Cunningham, A. (1838) Florae insularum Novae Zelandiae precursor; or a specimen of the botany of the Islands of New Zealand. Annals of Natural History 1: 455–462. https://doi.org/10.1080/00222933809496630</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Desjardins, S.D. (2015) Evolutionary studies in subtribe Reynoutriineae (Polygonaceae). PhD thesis, University of Leicester, Leicester.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Desjardins, S.T., Pashley, C.H. & Bailey, J.P. (2022) A taxonomic, cytological and genetic survey of Japanese knotweeds s.l. in New Zealand indicates multiple secondary introductions from Europe and a direct introduction from Japan. New Zealand Journal of Botany: 1–18. https://doi.org/10.1080/0028825X.2022.2090848</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Duistermaat, H., Soes, D.M., van Valkenburg, J., van Heuven, B.J., Zonneveld, B. & Kessler, P.J.A. (2012) Actuele verspreiding en risico’s van mannelijk fertiele Fallopia japonica (Polygonaceae) planten. NCB Naturalis, Leiden. </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Galasso, G., Banfi, E., De Mattia, F., Grassi, F., Sgorbati, S. & Labra, M. (2009) Molecular phylogeny of Polygonum L. s.l. (Polygonoideae, Polygonaceae), focusing on European taxa: preliminary results and systematic considerations based on rbcL plastidial sequence data. Atti della Società Italiana di Scienze Naturali e del Museo Civico di Storia Naturale di Milano 150: 113–148.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Gillies, S., Clements, D.R. & Grenz, J. (2016) Knotweed (Fallopia spp.) invasion of North America utilizes hybridization, epigenetics, seed dispersal (unexpectedly), and an arsenal of physiological weapons. Invasive Plant Science and Management 9: 71–80. https://doi.org/10.1614/IPSM-D-15-00039.1 </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Greilhuber, J., Doležel, J., Lysák, M.A. & Bennett, M.D. (2005) The origin, evolution and proposed stabilization of the terms ‘Genome size’ and ‘C-value’ to describe nuclear DNA contents. Annals of Botany (Oxford) 95: 255–260. https://doi.org/10.1093/aob/mci019 </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Groom, Q. (2011) Reynoutria compacta. In: Verloove, F. (Ed.) Manual of the Alien Plants of Belgium. Botanic Garden Meise, Meise. Available from: https://alienplantsbelgium.myspecies.info/content/reynoutria-compacta (accessed 30 August 2021).</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Gu?uleac, M. (1952) Addenda diagnoses plantarum novarum in tomo I Florae R.P.R. commemoratarum. In: S?vulescu, T. (Ed.) Flora Republicii populare Române I. Academia Reipublicii populare Române, Bucure?ti, pp. 633–645.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Haraldson, K. (1978) Anatomy and taxonomy in Polygonaceae subfam. Polygonoideae Meisn. emend. Jaretzky. Symbolae Botanicae Upsalienses; Arbeten Fran Botaniska Institutionen i Uppsala. Uppsala 22 (2): 1–95.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Hlavá?ek, R., Mandák, B. & Pyšek, P. (1996) N?kolik poznámek k nálezu Reynoutria japonica var. compacta v ?eské republice. Zprávy ?eské Botanické Spole?nosti 31: 167–171.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Hollingsworth, M.L. & Bailey, J.P. (2000) Hybridisation and clonal diversity in some introduced Fallopia species (Polygonaceae). Watsonia 23: 111–121.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Holm, A.-L., Elameen, A., Oliver, B.W., Brandsæter, L.O., Fløistad, I.S. & Brurberg, M.B. (2018) Low genetic variation of invasive Fallopia spp. in their northernmost European distribution range. Ecology and Evolution 8: 755–764. https://doi.org/10.1002/ece3.3703</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Holub, J. (1971) Fallopia Adans. 1763 instead of Bilderdykia Dum. 1827. Folia Geobotanica et Phytotaxonomica 6: 171–177. https://doi.org/10.1007/BF02851760</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Honda, M. (1932) Nuntia ad floram Japoniae XIX. The Botanical Magazine, Tokyo 46: 675–678. https://doi.org/10.15281/jplantres1887.46.675 </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Hooker, J.D. (1880) Plants of the Royal Gardens of Kew. Curtis’s Botanical Magazine 106: t. 6476.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Houttuyn, M. (1777) Natuurlijke Historie, part 2, fasc. 8. De Erven van F. Houttuyn, Amsterdam, 784 pp.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Keil, P. & Fuchs, R. (2019) Ein Vorkommen von Fallopia ×conollyana (Polygonaceae) in Essen (Nordrhein-Westfalen). Floristische Rundbriefe 53: 2–11. </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Kim, J.Y. & Park, C.W. (2000) Morphological and chromosomal variation in Fallopia section Reynoutria (Polygonaceae) in Korea. Brittonia 52: 34–48. https://doi.org/10.2307/2666492 </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Lavoie, C. (2017) The impact of invasive knotweed species (Reynoutria spp.) on the environment: review and research perspectives. Biological Invasions 19: 2319–2337. https://doi.org/10.1007/s10530-017-1444-y</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Linnaeus, C. (1753) Species plantarum, vols. 1–2. Impensis Laurentii Salvi, Holmiae [Stockholm], 1200 pp.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Linnaeus, C. (1762) Species plantarum, ed. 2, vol. 1. Impensis Laurentii Salvii, Holmiae, [Stockholm], 784 pp.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Loos, G.H. (2010) Taxonomische Neukombinationen zur Flora Mittel- und Osteuropas, insbesondere Nordrhein-Westfalens. Jahrbuch des Bochumer Botanischen Vereins 1: 114–133.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Löve, Á. (1970) Emendations in the Icelandic Flora. Taxon 19: 298–302. https://doi.org/10.2307/1217990 </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Makino, T. (1928) A contribution to the knowledge of the flora of Japan. Journal of Japanese Botany 5: 1–48.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Mandák, B. & Pyšek, P. (2019) Reynoutria Houtt. – k?ídlatka. In: Kaplan, Z., Danihelka, J., Chrtek, J.Jr., Kirschner, J., Kubát, K., Štech, M. & Št?pánek, J. (Eds.) Klí? ke kv?ten? ?eské republiky, Ed. 2. Academia, Praha, pp. 688–690.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Mandák, B., Bímová, K., Pyšek, P., Št?pánek, J. & Pla?ková, I. (2005) Isoenzyme diversity in Reynoutria (Polygonaceae) taxa: escape from sterility by hybridization. Plant Systematics and Evolution 253: 219–230. https://doi.org/10.1007/s00606-005-0316-6</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Mandák, B., Pyšek, P., Lysák, M., Suda, J., Krahulcová, A. & Bímová, K. (2003) Variation in DNA-ploidy levels of Reynoutria taxa in the Czech Republic. Annals of Botany 92: 265–272. https://doi.org/10.1093/aob/mcg141</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Maximowicz, C.J. (1859) Primitiae florae Amurensis, versuch einer flora des Amur-Landes. Mémoires présentés a l‘Académie Impériale des sciences de St.-Pétersbourg par divers savants et lus dans ses assemblées 9: 1–504.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Meisner, C.F. (1841a) Plantarum vascularium genera, part 1. Libraria Weidmannia, Lipsiae [Leipzig], 442 pp. https://doi.org/10.5962/bhl.title.44043 </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Meisner, C.F. (1841b) Plantarum vascularium genera, part 2. Libraria Weidmannia, Lipsiae [Leipzig], 402 pp. https://doi.org/10.5962/bhl.title.44043 </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Mere?a, P.Jr., Koláriková, Z. & Hodálová, I. (2019a) Cytological and morphological variation of Fallopia sect. Reynoutria taxa (Polygonaceae) in the Krivánska Malá Fatra Mountains (Slovakia). Biologia (Bratislava) 74: 215–236. https://doi.org/10.2478/s11756-018-00168-w</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Mere?a, P.Jr., Majerová, M., Somlyay, L., Pekárik, L. & Hodálová, I. (2019b) Genome size variation in the Western Carpathian Sesleria (Poaceae) species. Plant Systematics and Evolution 305: 845–864. https://doi.org/10.1007/s00606-019-01622-1 </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Moravcová, L., Pyšek, P., Jarošik, V. & Zákravský, P. (2011) Potential phssssesytotoxic and shading effects of invasive Fallopia (Polygonaceae) taxa on the germination of native dominant species. NeoBiota 9: 31–47. https://doi.org/10.3897/neobiota.9.1266</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Murín, A. (1960) Substitution of cellophane for glass covers to facilitate preparation of permanent squashes and smears. Stain Technology 35: 351–353.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Murray, J.A. (1784) Caroli a Linneì equitis Systema vegetabilium etc., Ed. 14. Typis et impensis Jo. Christ. Dieterich, Gottingae, 987 pp. https://doi.org/10.5962/bhl.title.549</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Park, Ch.-W., Bhandari, G.S., Won, H., Park, J.H. & Park, D.S. (2018) Polyploidy and introgression in invasive giant knotweed (Fallopia sachalinensis) during the colonization of remote volcanic islands. Scientific Reports 8: 16021. https://doi.org/10.1038/s41598-018-34025-2 </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Pashley, C.H. (2003) The use of molecular markers in the study of the origin and evolution of Japanese knotweed sensu lato. PhD thesis, University of Leicester, Leicester, 344 pp.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Pashley, C.H., Bailey, J.P. & Ferris, C. (2007) Clonal diversity in British populations of the alien invasive giant knotweed, Fallopia sachalinensis (F. Schmidt) Ronse Decraene, in the context of European and Japanese plants. Watsonia 26: 359–371.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Pyšek, P., Brock, J.H., Bímová, K., Mandák, B., Jarošík, V., Koukolíková, I., Pergl, J. & Št?pánek, J. (2003) Vegetative regeneration in ivasive Reynoutria (Polygonaceae) taxa: the determination of invasibility at the genotype level. American Journal of Botany 90: 1487–1495. https://doi.org/10.3732/ajb.90.10.1487</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Richardson, D.M., Pyšek, P., Rejmánek, M., Barbour, M.G., Panetta, D.F. & West, C.J. (2000) Naturalization and invasion of alien plants: concepts and definitions. Diversity and Distributions 6: 93–107. https://doi.org/10.1046/j.1472-4642.2000.00083.x</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Regel, E. (1884) Descriptiones plantarum novarum et minus cognitarum, fasc. IX. B. Descriptiones et emendationes plantarum bucharicarum turkestanicarumque. Trudy Imperatorskago S.-Peterburgskago Botaniceskago Sada [Acta Horti Petropolitani] 8: 645–702 + 21 figs.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Ronse Decraene, L.-P. & Akeroyd, J.R. (1988) Generic limits in Polygonum and related genera (Polygonaceae) on the basis of floral characters. Botanical Journal of the Linnean Society 98: 321–371. https://doi.org/10.1111/j.1095-8339.1988.tb01706.x </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Saad, L., Tiébré, M.-S., Hardy, O.J., Mahy, G. & Vanderhoeven, S. (2011) Patterns of hybridization and hybrid survival in the invasive alien Fallopia complex (Polygonaceae). Plant Ecology Evolution 114: 12–18. https://doi.org/10.5091/plecevo.2011.444</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Schönswetter, P., Suda, J., Popp, M., Weiss-Schneeweiss, H. & Brochmann, C. (2007) Circumpolar phylogeography of Juncus biglumis (Juncaceae) inferred from AFLP fingerprints, cpDNA sequences, nuclear DNA content and chromosome numbers. Molecular Phylogenetics and Evolution 42: 92–103. https://doi.org/10.1016/j.ympev.2006.06.016 </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Schuster, T.M., Wilson, K.L. & Kron, K.A. (2011) Phylogenetic relationships of Muehlenbeckia, Fallopia, and Reynoutria (Polygonaceae) investigated with chloroplast and nuclear sequence data. International Journal of Plant Sciences 172: 1053–1066. https://doi.org/10.1086/661293</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Sell, P. & Murrell, G. (2018) Flora of Great Britain and Ireland. Volume 1. Lycopodiaceae – Salicaceae. Cambridge University Press, Cambridge, 787 pp.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Shimoda, M. & Yamasaki, N. (2016) Fallopia japonica (Japanese Knotweed) in Japan: why is it not a pest for Japanese people? In: Box, E.O. (Ed.) Vegetation structure and function at multiple spatial, temporal and conceptual scales. Geobotany Studies. Springer, Cham, pp. 447–473. https://doi.org/10.1007/978-3-319-21452-8_20 </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Stace, C.A. & Crawley, M.J. (2015) Alien Plants. William Collins, London, 626 pp.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Stalažs, A. (2022) The first findings of invasive Reynoutria ×bohemica Chrtek & Chrtková (Polygonaceae) in Latvia. Botany Letters 169: 119–126. https://doi.org/10.1080/23818107.2021.1981438</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Suda, J., Trávní?ek, P., Mandák, B. & Berchová-Bímová, K. (2010) Genome size as a marker for identifying the invasive alien taxa in Fallopia section Reynoutria. Preslia 82: 97–106.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Šípošová, H. (2016) Reynoutria Houtt. Krídlatka (pohánkovec). In: Goliašová, K. & Michalková, E. (Eds.) Flóra Slovenska VI/4. Veda, Bratislava, pp. 485–497.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Tiébré, M.-S., Bizoux, J.P., Hardy, O.J., Bailey, J.P. & Mahy, G. (2007a) Hybridization and morphogenetic variation in the invasive alien Fallopia (Polygonaceae) complex in Belgium. American Journal of Botany 94: 1900–1910. https://doi.org/10.3732/ajb.94.11.1900 </span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Tiébré, M.S., Vanderhoeven, S., Saad, L. & Mahy, G. (2007b) Hybridization and sexual reproduction in the invasive alien Fallopia (Polygonaceae) complex in Belgium. Annals of Botany (Oxford) 99: 193–203. https://doi.org/10.1093/aob/mcl242</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Tison, J.M., Abdulhak, S., Bock, B., Boudrie, M., Fridlender, A., Roccia, A., Van Es, J. & Véla, E. (2021) Combinaisons nouvelles requises dans la seconde édition de Flora Gallica. Evaxiana 8: 220–225.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Yonekura, K. & Ohashi, H. (1997) New combinations of East Asian species of Polygonum s.l. Journal of Japanese Botany 72: 154–161.</span></span></span>