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

[FWTA]

Asclepiadaceae, A. A. Bullock. Flora of West Tropical Africa 2. 1963

Morphology General Habit
An erect herb from a fusiform tuber a few inches to 4 ft. high
Morphology Reproductive morphology Flowers
Flowers greenish-yellow
Morphology Reproductive morphology Fruits
Follicles erect, long-stipulate, narrowly fusiform, up to nearly 1 ft. long but often much less
Ecology
In grassy savanna.

[FTEA]

Apocynaceae (part 2), David Goyder, Timothy Harris, Siro Masinde, Ulrich Meve, Johan Venter. Flora of Tropical East Africa, 2012

Morphology General Habit
Erect or occasionally decumbent perennial with an erect carrot-shaped tuber 3–5 × 3 cm.
Morphology Stem
Stems one or few, simple or branched, (10–)20–60 cm, pubescent with short curled hairs
Morphology Leaves
Leaves erect or spreading; petiole 1–2(–5) mm long; lamina ovate to oblong- or linear-lanceolate, rarely linear or obovate, (1.5–)4–8(–17) × 0.2–2(–3) cm, apex obtuse with a short mucro or acute, rarely retuse, the base usually truncate or slightly cordate, occasionally rounded or subcuneate, margins smooth or undulate, secondary and often tertiary venation prominent, often raised, reticulate, with a glabrous or pubescent marginal vein, remainder of lamina glabrous or with scattered reddish hairs below
Morphology Reproductive morphology Inflorescences
Umbels sessile or very rarely pedunculate, extra-axillary with 4–10(–15) flowers at few or often at many of the nodes, all umbels apparently on one side of the stem.
Morphology Reproductive morphology Inflorescences Bracts
Bracts often deciduous, filiform or narrowly triangular, 3–6 mm long, pubescent at least on the margin.
Morphology Reproductive morphology Flowers Pedicel
Pedicels 4–15(–18) mm long, pubescent
Morphology Reproductive morphology Flowers Calyx
Calyx lobes reflexed slightly by the corolla, triangular, ± 3 × 1 mm, acute, pubescent
Morphology Reproductive morphology Flowers Corolla
Corolla cream or white to reddish brown, lobed almost to the base, reflexed; lobes ovate, 4–6(–7) × 2–3.5 mm, acute, glabrous but minutely papillate at base on inner surface, outer surface glabrous or with scattered reddish hairs in the upper half
Morphology Reproductive morphology Flowers Corona
Corona lobes green or brownish, on short spreading stalks arising near the base of the column, subglobose, 1–2 mm diameter with a smooth or papillate tooth or beak pointing up the side of the anthers and reaching from 1/2 to the full height of the column
Morphology Reproductive morphology Flowers Gynostegium
Gynostegium 3–4 mm long, gynostegial stalk up to 1 mm long.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anther wings narrowly triangular giving the column a subcylindric or slightly conical appearance; appendages ovate, ± 1 mm long, acute, inflexed over the stylar head
Morphology Reproductive morphology Flowers Gynoecium Style
Stylar head truncate, raised slightly above the tip of the anthers; corpusculum dark brown, ovoid, 0.2–0.3 mm long; translator arms weakly geniculate at the middle, proximal half winged on both sides or just the lower one, the winged part (0.2–)0.3–0.5 × 0.1–0.2 mm, translucent, distal part (0.2–)0.4 mm long, slender, terete or sometimes with a narrow translucent wing.
Morphology Reproductive morphology Flowers Pollinia
Pollinia oblanceolate, 0.8–1.2 × 0.2–0.4 mm
Morphology Reproductive morphology Fruits
Follicles erect, 11–19 cm long, 1 cm wide, narrowly fusiform, long attenuate at both apex and base, smooth and minutely pubescent
Figures
Fig 110, p 454
Ecology
Grassland, occasionally in mixed deciduous woodland; 1200–2000 m
Note
[ Saxymolbium heudelotianum (Decne.) Bullock, mentioned in U.K.W.F. ed. 2: 176 (1994) as a synonym, is a manuscript name, never validly published. ] This species is very variable in leaf shape. Two collections from western Uganda are unusual in having broadly oblong or obovate leaves with a retuse apex and material from the Chyulu Hills in Kenya has unusually long leaves. However, in other characters these collections are typical of X. heudelotianum and, therefore, have not been recognised taxonomically.
Distribution
Flora districts: U2 U3 U4 K2 K3 K4 K5 K6 T1 T4 T7 Range: Gambia to Nigeria, Cameroon, Congo-Kinshasa, Burundi, South Sudan, Zambia, Malawi, Mozambique and Zimbabwe

Native to:

Benin, Burkina, Burundi, Cameroon, Central African Repu, Chad, Congo, Ethiopia, Gabon, Gambia, Ghana, Guinea, Ivory Coast, Kenya, Malawi, Mali, Mozambique, Niger, Nigeria, Rwanda, Senegal, Sierra Leone, Sudan, Tanzania, Uganda, Zambia, Zaïre, Zimbabwe

Xysmalobium heudelotianum Decne. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Keay, R.W.J. [FHI 25930], Nigeria 22853.000
Milne-Redhead, E. [5078], Ghana 23264.000
Meikle, R.D. [1069], Nigeria 24362.000
Robson, N.K.B. [1058], Zambia 29860.000
Leedal, G.P. [5369], Tanzania 40398.000
Gilliland [1131], Zimbabwe 58626.000
Bally [893], Kenya 58630.000
Richards [18690], Tanzania 58634.000
Eggeling [623], Uganda 58639.000
Dehn [531], Zimbabwe 58644.000
Goyder, D.J. [3830], Tanzania 59798.000
Buchanan, J. [s.n.], Malawi K000234550 Unknown type material
Cecil, E. [51], Zimbabwe K000234551
Cecil, E. [135], Zimbabwe K000234552
Stuhlmann [2096], Tanzania K000234553
Hinde [s.n.], Kenya K000234554 Unknown type material
Scott Elliot, G.F. [5184], Sierra Leone K000234556 Unknown type material
K000234557 isotype

First published in A.P.de Candolle, Prodr. 8: 520 (1844)

Accepted by

  • Akoègninou, A., van der Burg, W.J. & van der Maesen, L.J.G. (eds.) (2006). Flore Analytique du Bénin: 1-1034. Backhuys Publishers.
  • Aké Assi, L. (2001). Flore de la Côte-d'Ivoire: catalogue systématique, biogéographie et écologie. I Boissiera 57: 1-396.
  • Boudet, G., Lebrun, J.P. & Demange, R. (1986). Catalogue des plantes vasculaires du Mali: 1-465. Etudes d'Elevage et de Médecine Vétérinaire des Pays Tropicaux.
  • Boulvert, Y. (1977). Catalogue de la Flore de Centrafrique 2(1): 1-85. ORSTOM, Bangui.
  • Brundu, G. & Camarda, I. (2013). The Flora of Chad: a checklist and brief analysis PhytoKeys 23: 1-18.
  • Darbyshire, I., Kordofani, M., Farag, I., Candiga, R. & Pickering, H. (eds.) (2015). The Plants of Sudan and South Sudan: 1-400. Kew publishing, Royal Botanic Gardens, Kew.
  • Goyder, D.J., Gilbert, M.G. & Venter, H.J.T. (2020). Flora Zambesiaca 7(3): 1-375. Royal Botanic Gardens, Kew.
  • Goyder, S., Harris, T., Masinde, S., Meve, U. & Venter, J. (2012). Flora of Tropical East Africa, Apocynaceae(2): 1-530.
  • Hedberg, I., Edwards, S. & Nemomissa, S. (eds.) (2003). Flora of Ethiopia and Eritrea 4(1): 1-352. The National Herbarium, Addis Ababa University, Ethiopia & The Department of Systematic Botany, Upps.
  • Hepper, F.N. (ed.) (1963). Flora of West Tropical Africa, ed. 2, 2: 1-544.
  • Lebrun, J.P., Toutain, B., Gaston, A. & Boudet, G. (1991). Catalogue des Plantes Vasculaires du Burkina Faso: 1-341. Institut d' Elevage et de Médecine Vétérinaire des Pays Tropicaux, Maisons Alfort.
  • Lisowski, S. (2009). Flore (Angiospermes) de la République de Guinée Scripta Botanica Belgica 41: 1-517.
  • Peyre de Fabregues, B. & Lebrun, J.-P. (1976). Catalogue des Plantes Vascularies du Niger: 1-433. Institut d' Elevage et de Médecine Vétérinaire des Pays Tropicaux, Maisons Alfort.
  • Sita, P. & Moutsambote, J.-M. (2005). Catalogue des plantes vasculaires du Congo, ed. sept. 2005: 1-158. ORSTOM, Centre de Brazzaville.
  • Troupin, G. (ed.) (1985). Flora du Rwanda 3: 1-729. Musee Royal de l'Afrique Centrale.
  • Walters, G., Dauby, G., Stévart, T., Dessein, S., Niangadouma, R. & Lachenaud, O. (2011). Novitates Gabonenses 80. Additions and corrections to the flora of Gabon Edinburgh Journal of Botany 68: 423-442.

Literature

Flora of West Tropical Africa

  • F.T.A. 4, 1: 304.
  • in DC. Prod. 8: 520 (1844)

Kew Backbone Distributions

  • Akoègninou, A., van der Burg, W.J. & van der Maesen, L.J.G. (eds.) (2006). Flore Analytique du Bénin: 1-1034. Backhuys Publishers.
  • Aké Assi, L. (2001). Flore de la Côte-d'Ivoire: catalogue systématique, biogéographie et écologie. I Boissiera 57: 1-396.
  • Boudet, G., Lebrun, J.P. & Demange, R. (1986). Catalogue des plantes vasculaires du Mali: 1-465. Etudes d'Elevage et de Médecine Vétérinaire des Pays Tropicaux.
  • Boulvert, Y. (1977). Catalogue de la Flore de Centrafrique 2(1): 1-85. ORSTOM, Bangui.
  • Brundu, G. & Camarda, I. (2013). The Flora of Chad: a checklist and brief analysis PhytoKeys 23: 1-18.
  • Goyder, S., Harris, T., Masinde, S., Meve, U. & Venter, J. (2012). Flora of Tropical East Africa, Apocynaceae(2): 1-530.
  • Hedberg, I., Edwards, S. & Nemomissa, S. (eds.) (2003). Flora of Ethiopia and Eritrea 4(1): 1-352. The National Herbarium, Addis Ababa University, Ethiopia & The Department of Systematic Botany, Upps.
  • Lebrun, J.P., Toutain, B., Gaston, A. & Boudet, G. (1991). Catalogue des Plantes Vasculaires du Burkina Faso: 1-341. Institut d' Elevage et de Médecine Vétérinaire des Pays Tropicaux, Maisons Alfort.
  • Lisowski, S. (2009). Flore (Angiospermes) de la République de Guinée Scripta Botanica Belgica 41: 1-517.
  • Peyre de Fabregues, B. & Lebrun, J.-P. (1976). Catalogue des Plantes Vascularies du Niger: 1-433. Institut d' Elevage et de Médecine Vétérinaire des Pays Tropicaux, Maisons Alfort.
  • Sita, P. & Moutsambote, J.-M. (2005). Catalogue des plantes vasculaires du Congo, ed. sept. 2005: 1-158. ORSTOM, Centre de Brazzaville.
  • Troupin, G. (ed.) (1985). Flora du Rwanda 3: 1-729. Musee Royal de l'Afrique Centrale.
  • Walters, G., Dauby, G., Stévart, T., Dessein, S., Niangadouma, R. & Lachenaud, O. (2011). Novitates Gabonenses 80. Additions and corrections to the flora of Gabon Edinburgh Journal of Botany 68: 423-442.

Flora of Tropical East Africa

  • DC., Prodr. 8: 520 (1844)
  • F.W.T.A. ed. 2, 2: 93 (1963)
  • Fl. Eth. 4(1): 132 (2003).

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

Flora of West Tropical Africa
Flora of West Tropical 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