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Type: Article
Published: 2026-02-13
Page range: 215-225
Abstract views: 22
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Iosanthus crypticus (Hyacinthaceae subfam. Urgineoideae), a new species from Namibia

Depto. de Ciencias Ambientales y Recursos Naturales (dCARN), Universidad de Alicante, P. O. Box 99, E-03080 Alicante, Spain; Department of Botany, Rhodes University, Makhanda, 6140, South Africa
Farm Vergenoeg No.402, PO Box 716, Distr. Okahandja, Namibia
Depto. de Ciencias Ambientales y Recursos Naturales (dCARN), Universidad de Alicante, P. O. Box 99, E-03080 Alicante, Spain
P.O. Box 2292, Windhoek, Namibia
Asparagaceae distribution ecology Scilloideae taxonomy Monocots

Abstract

Field exploration in the farm Vergenoeg in northern Namibia revealed an undescribed species of Iosanthus, which shares the diagnostic characters of the genus, but differs from the other species by distinct morphological characters. Accordingly, we here describe Iosanthus crypticus, based on plants with minute overall plant size, filiform, greyish leaves, spurred bracts, minute stellate flowers, free tepals, free stamens with filiform filaments and ovoid ovary with narrowly columnar style, among other features. We provide a complete morphological description of the new species as well as data on ecology, distribution and relationships with related species.

References

  1. Angiosperm Phylogeny Group (2003) An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG II. Botanical Journal of the Linnean Society 141: 399–436. https://doi.org/10.1046/j.1095-8339.2003.t01-1-00158.x
  2. Angiosperm Phylogeny Group (2009) An update of the Angiosperm Phylogeny Group Classification for the orders and families of flowering plants: APG III. Botanical Journal of the Linnean Society 161: 105–121. https://doi.org/10.1111/j.1095-8339.2009.00996.x
  3. Angiosperm Phylogeny Group (2016) An update of the Angiosperm Phylogeny Group Classification for the orders and families of flowering plants: APG IV. Botanical Journal of the Linnean Society 181: 1–20. https://doi.org/10.1111/boj.12385
  4. Archer, C. & Archer, R.H. (1999) A new species of Ornithogalum subgenus Urophyllon (Hyacinthaceae) from central South Africa and southern Namibia. South African Journal of Botany 65: 431–433. https://doi.org/10.1016/S0254-6299(15)31035-8
  5. Atlas of Namibia Team (2022) Atlas of Namibia: its land, water and life. Namibia Nature Foundation, Windhoek.
  6. Baker, J.G. (1873) On Schizobasis, a new genus of Liliaceae from Cape Colony. Journal of Botany, British and Foreign 11: 105.
  7. Baker, J.G. (1881) Notes on a collection of flowering plants made by L. Kitching, Esq., in Madagascar in 1879. Journal of the Linnean Society, Botany 18: 264–281. https://doi.org/10.1111/j.1095-8339.1881.tb01257.x
  8. Baker, J.G. (1903) Liliaceae. In: Schinz, H. (Ed.) Kenntnis der Afrikanischen Flora 15. Bulletin de L’Herbier Boissier, Ser. 2, 3 (8): 663–668.
  9. Chase, M.W., Reveal, J.L. & Fay, M.F. (2009) A subfamilial classification for the expanded asparagalean families, Amaryllidaceae, Asparagaceae and Xanthorrhoeaceae. Botanical Journal of the Linnean Society 161: 132–136. https://doi.org/10.1111/j.1095-8339.2009.00999.x
  10. Compton, R.H. (1930) Novitates Africanae. Journal of Botany, British and Foreign London 68: 102–107.
  11. Gray, S.F. (1821) Natural arrangement of British plants, 2. Baldwin, Cradock & Joy, London, 760 pp.
  12. Harvey, W.H. (1844) Litanthus, a new genus of Asphodeleae from South Africa. The London Journal of Botany 3: 314–315.
  13. IPNI (2026+) The international plant names index. Available from: http://www.ipni.org (accessed January 2026)
  14. Jessop, J.P. (1977) Studies in the bulbous Liliaceae in South Africa 7. The taxonomy of Drimia and certain allied genera. Journal of South African Botany 43 (4): 265–319. https://doi.org/10.5962/p.397096
  15. Kuntze, O. (1886) Plantae Pechuelianae hereroenses. Jahrbuch des Königlichen Botanischen Gartens und des Botanischen Museums zu Berlin 4: 260–275.
  16. Leistner, O.A. & Morris, J.W. (1976) Southern African place names. Annals of the Cape Provincial Museum 12: 1–565.
  17. Maire, R. (1926) Contributions à l´étude de la Flore de l´Afrique du nord. Bulletin de la Socie´te´ d’Histoire Naturelle de l’Afrique du Nord 17: 104–126.
  18. Manning, J.C. & Goldblatt, P. (2018) Systematics of Drimia Jacq. (Hyacinthaceae: Urgineoideae) in southern Africa. Strelitzia 40. South African National Biodiversity Institute, Pretoria, 173 pp.
  19. Martínez-Azorín, M., Crespo, M.B. & Juan, A. (2007) Taxonomic revision of Ornithogalum subg. Cathissa (Salisb.) Baker (Hyacinthaceae). Anales del Jardín Botánico de Madrid 64: 7–25. https://doi.org/10.3989/ajbm.2007.v64.i1.47
  20. Martínez-Azorín, M., Crespo, M.B. & Juan, A. (2009) Taxonomic revision of Ornithogalum subg. Beryllis (Hyacinthaceae) in the Iberian Peninsula and the Balearic Islands. Belgian Journal of Botany 142: 140–162.
  21. Martínez-Azorín, M., Crespo, M.B., Juan, A. & Fay, M.F. (2011) Molecular phylogenetics of subfamily Ornithogaloideae (Urgineoideae) based on nuclear and plastid DNA regions, including a new taxonomic arrangement. Annals of Botany (Oxford) 107: 1–37. https://doi.org/10.1093/aob/mcq207
  22. Martínez-Azorín, M., Crespo, M.B., Pinter, M., Slade, J.M. & Wetschnig, W. (2019a) Iosanthus (Hyacinthaceae subfam. Urgineoideae), a new genus from Southern Africa to include Ornithogalum toxicarium and its removal from Ornithogaloideae. Plant Biosystems 153: 580–588. [published online 18 December 2018] https://doi.org/10.1080/11263504.2018.1527793
  23. Martínez-Azorín, M., Crespo, M.B., Alonso-Vargas, M.Á., Dold, A.P., Crouch, N.R., Pfosser, M., Mucina, L., Pinter, M. & Wetschnig, W. (2019b) New combinations in the tribe Urgineeae (Asparagaceae subfam. Scilloideae) with comments on contrasting taxonomic treatments. Phytotaxa 397 (4): 291–299. https://doi.org/10.11646/phytotaxa.397.4.3
  24. Martínez-Azorín, M., Crespo, M.B., Alonso, M.Á., Pinter, M., Crouch, N.R., Dold, A.P., Mucina, L., Pfosser, M. & Wetschnig, W. (2023a) A generic monograph of the Hyacinthaceae subfam. Urgineoideae. Phytotaxa 610 (1): 1–143. https://doi.org/10.11646/phytotaxa.610.1.1
  25. Martínez-Azorín, M., Crespo, M.B., Alonso, M.Á., Pinter, M., Crouch, N.R., Dold, A.P., Mucina, L., Pfosser, M. & Wetschnig, W. (2023b) Molecular phylogenetics of subfamily Urgineoideae (Urgineoideae): Towards a coherent generic circumscription informed by molecular, morphological and distributional data. Journal of Systematics and Evolution 63 (1): 42–63. https://doi.org/10.1111/jse.12905
  26. Martínez-Azorín, M., Crespo, M.B., Alonso-Vargas, M.Á., Villar, J.L., Rügheimer, S. & Chase, F. (2025) Litanthus deserticola (Hyacinthaceae subfam. Urgineoideae), a new species from southern Namibia. Phytotaxa 731 (2): 139–149. https://doi.org/10.11646/phytotaxa.731.2.4
  27. Medikus, F.K. (1790) Von zwei neuen Pflanzengeschlechtern, deren Hauptcharaktere in dem Wurzelbaue liegen. Historia et Commentationes Academiae Electoralis Scientiarum et Elegantiorum Litterarum Theodoro-Palatinae 6: 369–373.
  28. Moore, T. & Masters, M.T. (1866) Rare and interesting plants now in bloom at Kew. The Gardeners Chronicle and Agricultural Gazette 1866: 971–972.
  29. Rafinesque, C.S. (1837) Flora Telluriana, vol. 3. H. Probasco, Philadelphia, PA, 100 pp. https://doi.org/10.5962/bhl.title.7751
  30. Roxburgh, W. (1832) Flora Indica or Descriptions of Indian Plants, vol. 2. W. Thacker & Co., Calcutta [Kolkata], 691 pp. https://doi.org/10.5962/bhl.title.590
  31. Salisbury, R.A. (1866) The genera of plants: A fragment containing part of Liriogamae. John van Voorst, London, 143 pp.
  32. Schinz, H. (1902) Liliaceae. Bulletin de l’Herbier Boissier Ser. 2, 2: 937–941.
  33. Schönland, S. (1912) Neopatersonia, a new genus of Liliaceae. Records of the Albany Museum 2: 251–253.
  34. Speta, F. (1998) Systematische Analyse der Gattung Scilla L. s.l. (Hyacinthaceae). Phyton (Horn, Austria) 38 (1): 1–141.
  35. Speta, F. (2001) Die Echte und die Falsche Meerzwiebel: Charybdis Speta und Stellarioides Medicus (Hyacinthaceae), mit Neubeschreibungen und Neukombinationen im Anhang. Stapfia 75: 139–176.
  36. Steinheil, A. (1834) Note sur le genre Urginea nouvellement formé dans la famille des Liliacées. Annales des Sciences Naturelles, Botanique, Sér. 2, 1: 321–332.
  37. Thiers, B. (2026+) Index Herbariorum: A global directory of public herbaria and associated staff. New York Botanical Garden's Virtual Herbarium. Available from: http://sweetgum.nybg.org/ (accessed January 2026)
  38. Turland, N.J., Wiersema, J.H., Barrie, F.R., Gandhi, K.N., Gravendyck, J., Greuter, W., Hawksworth, D.L., Herendeen, P.S., Klopper, R.R., Knapp, S., Kusber, W.-H., Li, D.-Z., May, T.W., Monro, A.M., Prado, J., Price, M.J., Smith, G.F. & Zamora Señoret, J.C. (Eds.) (2025) International Code of Nomenclature for algae, fungi, and plants (Madrid Code). Regnum Vegetabile 162. University of Chicago Press, Chicago, 288 pp.
  39. Wright, C.H. (1916) Diagnoses africanae: LXIX. Bulletin of Miscellaneous Information, Royal Gardens, Kew 1916: 229–235. https://doi.org/10.2307/4114331

How to Cite

Martínez-Azorín, M., Eichhoff, A., Crespo, M.B. & Rügheimer, S. (2026) Iosanthus crypticus (Hyacinthaceae subfam. Urgineoideae), a new species from Namibia. Phytotaxa 741 (2): 215–225. https://doi.org/10.11646/phytotaxa.741.2.6