Abstract
A synoptic revision of Diplazium in Rwanda is provided. Two species, Diplazium humbertii and D. zanzibaricum had already been recorded for the country. Here we describe D. cyamudongoense sp. nov. that can be readily distinguished by the long and brittle scales at the base of the stipe. A key to the species is provided. The spores of the three studied species are documented and compared.
References
Baker, J.G. (1876) On a collection of ferns made by Mr. William Pool in the interior of Madagascar. Journal of the Linnean Society, Botany 15: 411–422. https://doi.org/10.1111/j.1095-8339.1876.tb00251.x
Baker, J.G. (1891) A summary of the new ferns which have been discovered or described since 1874. Annals of Botany (Oxford) 5 (3): 301–332. [https://www.jstor.org/stable/43234095] https://doi.org/10.1093/oxfordjournals.aob.a090641
Bory de St. Vincent, J.-B. (1804) Voyage dans les quatre principals îles des mers d’Afrique. F. Buisson, Paris, 522 pp.
Brause, G. & Hieronymus, G. (1910) Polypodiaceae. In: Mildbraed, J. (ed.) Wissenschaftliche Ergebnisse der deutschen Zentral-Afrika Expedition 1907-1908 unter Führung Adolf Friedrichs, Herzogs zu Mecklenburg 2. Klinkhardt & Biermann, Leipzig. 2–36. [https://www.biodiversitylibrary.org/page/6558998]
Cavanilles, A.J. (1801) Funestos efectos de la rabia. Anales de Ciencias Naturales 4: 4–366.
Christenhusz, M.J.M., Fay, M.F. & Byng, J.W. (2018) Plant Gateway’s The Global Flora. GLOVAP Nomenclature Part 1, Bradford, UK, 155 pp.
Christensen, C. (1905) Index Filicum sive Enumeratio omnium generum specierumque Filicum et Hydropteridum ab anno 1753 ad finem annum 1905 descriptorum. Hagerup, Copenhagen, 745 pp. [https://bibdigital.rjb.csic.es/idurl/1/12943]
Christensen, C. (1937) Athyrium humbertii C.Chr. Dansk Botanisk Arkiv 9 (3): 54.
Crouch, N.R., Klopper, R.E., Burrows, J.E. & Burrows, S. (2011) Ferns of Southern Africa. A comprehensive guide. Struik Nature, Cape Town, 775 pp.
Diels, L. (1899a) Cyatheaceae. In: Engler, A. & Prantl, K. (eds.) Die natürlichen Pflanzenfamilien. I. Teil. W. Engelmann, Leipzig, pp. 113–139. [https://www.biodiversitylibrary.org/page/16780361]
Diels, L. (1899b) Polypodiaceae. In: Engler, A. & Prantl, K. (eds.) Die natürlichen Pflanzenfamilien. I. Teil. Abt. 4. W. Engelmann, Leipzig, pp. 139–339. [https://www.biodiversitylibrary.org/page/16780361]
Hieronymus, G. (1900) Filicales. In: Engler, A. (ed.) III. Die von W. Goetze und Dr. Stuhlmann im Ulugurugebirge, sowie die von W. Goetze in der Kisaki- und Khutu-Steppe und in Uhehe gesammelten Pflanzen. Botanische Jahrbücher für Systematik 28: 339–349. [https://www.biodiversitylibrary.org/page/210819]
Hooker, W.J. & Greville, R.K. (1829) Icones Filicum 2. Treuttel & Würtz, London. Tab. CXXI - CCXL. [https://www.biodiversitylibrary.org/page/5436970]
Hooker, W.J. & Baker, J.G. (1867) Synopsis Filicum. R. Hardwicke, London, 523 pp. [urn:lsid:ipni.org:publications:14664-2]
Jermy, C.A. (1964) Two species of Diplazium in Europe. British Fern Gazette 9 (1): 160–162. [https://www.biodiversitylibrary.org/page/38972700]
Kaulfuss, G.F. (1824) Enumeratio Filicum quas in itinere circa-terram legit Cl. Adalbertus de Chamisso. C. Cnobloch, Lipsiae (Leipzig), I–VI, 300 pp. [urn:nbn:de:bvb:12-bsb10302018-2]
Kornas, J. & Nowak, K.A. (1991) Contribution to the fern flora of Rwanda. Zeszyty Naukowe Universytetu Jagiellonskiego Prace Botaniczne–Zeszyt 22: 7–14.
Kuhn, M. (1879) Cryptogamae vasculares. In: von Pless, A. (Ed.) Baron Carl Claus von der Decken’s Reisen in Ost Afrika in den Jahren 1859-61 III. Abteilung 3, Botanik. F.Winter, Leipzig & Heidelberg, pp. 7–61.
Kunze, G. (1837) Analecta pteridographica seu descriptio et illustratio filicum aut novarum, aut minus cognitarum. L. Voss, Lipsiae (Leipzig), 50 pp. [urn:lsid:ipni.org:publications:11089-2]
Kurata, S. (1961) Diplazium sibiricum. Collection and Cultivation of our Ferns and Fern Allies: 340.
Lamarck, J.-B. (1786) Encylopédie méthodique. Botanique, Tome 2. Paris, Liège. 774 pp. [https://www.biodiversitylibrary.org/page/720654]
Pichi Sermolli, R.E.G. (1973) Fragmenta Pteridologiae III. Webbia 27 (2): 389–460. https://doi.org/10.1080/00837792.1973.10669981
Pichi Sermolli, R.E.G. (1983) A contribution to the knowledge of the Pteridophyta of Rwanda, Burundi, and Kivu (Zaire) I. Bulletin du Jardin botanique National de Belgique / Bulletin van de Nationale Plantentuin van België 53 (1/2): 177–284. https://doi.org/10.2307/3668036
Pichi Sermolli, R.E.G. (1985) A contribution to the knowledge of the Pteridophyta of Rwanda, Burundi, and Kivu (Zaïre) II. Bulletin du Jardin botanique National de Belgique / Bulletin van de Nationale Plantentuin van België 55 (1/2): 123–206. https://doi.org/10.2307/3668014
POWO (2022). Plants of the World Online. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; http://www.plantsoftheworldonline.org/ (accessed: 22 August 2022).
Roux, J.P. (2009) Synopsis of the Lycopodiophyta and Pteridophyta of Africa, Madagascar and neighbouring islands. Strelitzia 23: I–XIV, 1–296.
Schelpe, E.A.C.L.E. (1967) New taxa of Pteridophyta from South East Tropical Africa. Boletim da Sociedad Broteriana 41: 203–217.
Schelpe, E.A.C.L.E. & Anthony, N. (1986) Pteridophyta. In: Leistner, O.A. (ed.) Flora of Southern Africa. 292 pp.
Swartz, O. (1800) Genera et species Filicum. I. Abhandlungen. 1. Conspectus generum. Journal für die Botanik herausgegeben vom Medicinalrath Schrader 2: 3–120.
Thiers, B. (2022) [continuously updated] Index herbariorum. A global directory of public herbaria and associated staff. New York Botanical Garden’s Virtual Herbarium. Available from: http://sweetgum.nybg.org/science/ih/ (accessed 22 January 2022).
Verdcourt, B. (2003) Woodsiaceae. In: Beentje, H.J. & Ghazanfar, S.A. (eds.) Flora of Tropical East Africa. A.A. Balkema, Rotterdam. 25 pp.