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This species is accepted, and its native range is Tanzania.
A specimen from Kew's Herbarium

[FTEA]

Dioscoreaceae, E. Milne-Redhead. Flora of Tropical East Africa. 1975

Morphology General Habit
Tuber replaced annually, branching at top, the branches cylindric, descending vertically, up to 60 cm. long and 10 cm. in diameter.
Morphology Stem
Twining stems 6 m. long or more, sparsely beset with stellate hairs, soon glabrescent.
Morphology Leaves
Leaves usually opposite, occasionally alternate; petiole up to 6(–15) cm. long; blade ovate, rarely heart-shaped, with the base varying from deeply and widely cordate to subtruncate, acutely acuminate, up to 12(–14) cm. long and 7(–11) cm. broad, sparsely or densely clothed with small or longer stellate hairs, especially on the nerves, sometimes glabrescent beneath, subglabrous or with a few scattered stellate hairs above.
Morphology Reproductive morphology Inflorescences
Inflorescences descending, spicate.
Morphology Reproductive morphology Flowers
Male up to 6(–12) per leaf-axil, up to 7(–11) cm. long; flowers sessile, directed away from the axis; perianth ultimately curving outwards in flower, ± 3 mm. across; segments ovate, the inner narrower, obtuse, ± 2 mm. long. Female 3(–5) per leaf-axil, up to 25 cm. long, usually much shorter; perianth erect, almost 1.5 mm. across. Ovary densely stellate-pubescent.
sex Male
Male up to 6(–12) per leaf-axil, up to 7(–11) cm. long; flowers sessile, directed away from the axis; perianth ultimately curving outwards in flower, ± 3 mm. across; segments ovate, the inner narrower, obtuse, ± 2 mm. long.
sex Female
Female 3(–5) per leaf-axil, up to 25 cm. long, usually much shorter; perianth erect, almost 1.5 mm. across. Ovary densely stellate-pubescent.
Morphology Reproductive morphology Fruits
Capsule as in fig. 5/5, ± 4 cm. in diameter, glabrescent.
Morphology Reproductive morphology Seeds
Seeds winged all round, 2 cm. in diameter.
Figures
Figs. 4, p. 17, and 5.
Habitat
Upland rain-forest, often persisting in secondary growth after felling; 1000–1950 m.
Distribution
not known elsewhere T3 T6

Native to:

Tanzania

Dioscorea longicuspis R.Knuth appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Eggeling, W.J. [6770B], Tanzania 15656.000
Eggeling, W.J. [6769A], Tanzania 15657.000
Eggeling, W.J. [6766], Tanzania 17073.000
Eggeling, W.J. [6767], Tanzania 17204.000
Eggeling, W.J. [6770C], Tanzania 17206.000
Eggeling, W.J. [6770A], Tanzania 17207.000
Drummond, R.B. [1404], Tanzania K001147302
Grote, E. [3720], Tanzania K001147315
Soleman, R. [7563], Tanzania K001147316
Eggeling, W.J. [6766], Tanzania K001147328
Eggeling, W.J. [6772], Tanzania K001147336
Eggeling, W.J. [6770], Tanzania K001147343
Eggeling, W.J. [6770], Tanzania K001147345
Renvoize, S.A. [1624], Tanzania K001147311
Drummond, R.B. [1359], Tanzania K001147300
Drummond, R.B. [1359], Tanzania K001147301
Wallace, G.B. [476], Tanzania K001147321
Renvoize, S.A. [1624], Tanzania K001147312
Bruce, E.M. [334], Tanzania K001147323
Tanner, R. [2724], Tanzania K001147313
Eggeling, W.J. [6467], Tanzania K001147332
Mgaza, C.D. [202], Tanzania K001147295
Martin, F.W. [3], Tanzania K001147308
Eggeling, W.J. [6767], Tanzania K001147334
Richards, H.M. [22026], Tanzania K001147298
Heller, T. [126], Tanzania K001147320
Eggeling, W.J. [6770], Tanzania K001147346
Richards, H.M. [22026], Tanzania K001147299
Iversen, S.T. [85048], Tanzania K001147317
Eggeling, W.J. [6770], Tanzania K001147341
Eggeling, W.J. [6772], Tanzania K001147338
Harris, B.J. [1051], Tanzania K001147310
Eggeling, W.J. [6766], Tanzania K001147330
Martin, F.W. [2], Tanzania K001147307
Drummond, R.B. [1404], Tanzania K001147303
Eggeling, W.J. [6766], Tanzania K001147325
Eggeling, W.J. [6766], Tanzania K001147331
Grote, E. [3747], Tanzania K001147314
Archbold, R. [894A], Tanzania K001147292
Eggeling, W.J. [6766], Tanzania K001147333
Eggeling, W.J. [6766], Tanzania K001147327
Semsei, S.R. [3154], Tanzania K001147293
Eggeling, W.J. [6770], Tanzania K001147340
Eggeling, W.J. [6766], Tanzania K001147326
Eggeling, W.J. [6766], Tanzania K001147329
Eggeling, W.J. [6771], Tanzania K001147337
Eggeling, W.J. [6770], Tanzania K001147344
Batty, M. [976a], Tanzania K001147296
Archbold, M.E. [894], Tanzania K001147304
Eggeling, W.J. [6769], Tanzania K001147335
Ruffo, C. [165], Tanzania K001147319
Batty, M. [976], Tanzania K001147297
s.coll [3783], Tanzania K001147309
Suleiman, H.O. [309], Tanzania K001147318
Eggeling, W.J. [6770], Tanzania K001147342
Martin, F.W. [2], Tanzania K001147306
Wallace, C.B. [476], Tanzania K001147322
Eggeling, W.J. [6772], Tanzania K001147339
Eggeling, W.J. [6769], Tanzania K001147324
Semsei, S.R. [2223], Tanzania K001147294
Semsei, S.R. [4148], Tanzania K001147305

First published in Notizbl. Bot. Gart. Berlin-Dahlem 11: 1059 (1934)

Accepted by

  • Govaerts, R. (2000). World Checklist of Seed Plants Database in ACCESS D: 1-30141.
  • Govaerts, R., Wilkin, P. & Saunders, R.M.K. (2007). World Checklist of Dioscoreales. Yams and their allies: 1-65. The Board of Trustees of the Royal Botanic Gardens, Kew.

Literature

Flora of Tropical East Africa

  • R. Knuth in Notizblatt des Botanischen Gartens und Museums zu Berlin-Dahelm 11: 1059 (1934).

Flora of Tropical East Africa
Flora of Tropical East Africa
http://creativecommons.org/licenses/by-nc-sa/3.0

Herbarium Catalogue Specimens
Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0