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

[FZ]

Loganiaceae, A. J. M. Leeuwenberg. Flora Zambesiaca 7:1. 1983

Morphology General Habit
Shrub, climbing shrub, large liana or much branched small tree (as shrub 1·50–5 m. high, as liana 2–20 m. high or more, climbing over shrubs and in trees and then up to 70 m. long, as tree 3–10(15) m. high).
Morphology Trunk
Liana trunk 2–9 cm. in diam. (or more?); bark dark brown, thin, with many lenticels; wood pale yellow. Tree trunk 15–25 cm. in diam.; bark pale or dark grey or pale grey–brown with darker patches, smooth, in section orange; wood pale yellow.
Morphology Branches
Branches lenticellate, usually very dark brown, often covered with a pale skin which splits and peels off, not sulcate when dry; branchlets glabrous or shortly pubescent, not or slightly sulcate when dry.
Morphology General Tendrils
Tendrils solitary, only present in climbing shrubs or lianas.
Morphology Leaves
Leaves: petiole glabrous, 2–6 mm. long; lamina slightly shining and dark green above, less shining to dull and paler beneath, coriaceous or thinly coriaceous in the sun, in the shade thinner and thinly coriaceous or papyraceous, also when living, ovate, narrowly ovate, elliptic, or narrowly elliptic, 1–5–3 times as long as wide, 3–8 x 1·2–3·5 cm., in lianas in the shade up to 16 x 7 cm., distinctly acuminate or in the shade mostly caudate at the apex, usually mucronate at the very apex, cuneate, rounded, or occasionally subcordate at the base, glabrous on both sides; two pairs of secondary veins from or from above the base curved along the margin, outer usually fainter; tertiary venation reticulate, inconspicuous.
Morphology Reproductive morphology Inflorescences
Inflorescences axillary, solitary or several together, lax or congested, usually much shorter than the leaves, 1–2·5 x 1–1·5 cm., few–flowered, 1–3 times branched.
Morphology Reproductive morphology Flowers
Flowers 4–5–merous.
Morphology Reproductive morphology Flowers Calyx
Sepals pale green, connate at the base, subequal ovate, broadly ovate, or triangular, 1–1–3 times as long as wide, 0·6–1 x 0·6–1 mm., acute or obtuse, very minutely ciliate, glabrous on both sides or shortly pubescent outside, without colleters.
Morphology Reproductive morphology Flowers Corolla
Corolla in the mature bud 3–4 times as long as the calyx, 2–3·5 mm. long, and rounded at the apex, white, yellow, or sometimes orange, glabrous or minutely papillose–pubescent outside, inside with a ring of hairs in the throat and often, when outside so, minutely papillose–pubescent on the lobes; tube short, urceolate, 1–1·4(1·7) times as long as the calyx, 1–1·4 mm. long; at the throat 1·4–2·2 mm. wide; lobes 1·4–1·6(2·7) times as long as the tube, oblong, 1·3–2·2 times as long as wide, 1·2–2·2 x 0·8–1·3 mm., acute, recurved from somewhat below the middle.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens exserted; filaments 0·5–1·2(2) times as long as the anthers, inserted at the mouth of the corolla tube; anthers suborbicular or oblong, 0·6–0·9 x 0·3–0·7 mm., glabrous.
Morphology Reproductive morphology Flowers Gynoecium Pistil
Pistil glabrous, 1·1–2·5 mm. long; ovary ovoid, slightly longer than wide, 0·7–1 x 0·6–0·8 mm., 2–celled; style short, 0·4–1·5 mm. long; stigma capitate or sometimes obscurely bilobed.
Morphology Reproductive morphology Flowers Gynoecium Ovary Ovules
In each cell 4–7 ovules.
Morphology Reproductive morphology Fruits
Fruit orange or orange–yellow, immature pale green and often with a glaucous bloom, or glacous, small, soft, globose or subglobose, often laterally compressed, sometimes shortly stipitate within the calyx, 11–18 x 10–18 x 10–18 mm., with smooth skin, 1–seeded, mat, mostly oblique pedicellate. Wall thin, about 0·3 mm. thick. Pulp orange.
Morphology Reproductive morphology Seeds
Seed pale brown, depressed–globose or ellipsoid, 9 x 7x 5–12 x11 x 8 mm., shortly and densely pubescent, smooth, with a central hilum at one side.
Morphology Reproductive morphology Seeds Testa
Testa thin.

[FWTA]

Loganiaceae, C. F. A. Onochie & A. J. M. Leeuwenberg. Flora of West Tropical Africa 2. 1963

Morphology General Habit
With solitary tendrils, shrub or small tree (known in E. Africa as a tree up to 80 ft. high)
Morphology Branches
Branchlets conspicuously lenticellate, ultimate ones often covered with a pale skin which later splits and peels off
Morphology Reproductive morphology Flowers
Flowers greenish-yellow, in few-flowered axillary cymes
Ecology
In forest thickets.

Native to:

Benin, Burkina, Burundi, Congo, Ghana, Guinea, Ivory Coast, Kenya, KwaZulu-Natal, Liberia, Madagascar, Mozambique, Nigeria, Northern Provinces, Rwanda, Sierra Leone, Swaziland, Tanzania, Uganda, Zambia, Zaïre, Zimbabwe

Strychnos usambarensis Gilg ex Engl. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Jan 1, 1971 Chase, N.C. [8512], Zimbabwe K000285537
Jan 1, 1967 Swynnerton, C.F.M. [125], Zimbabwe K000426779 isotype
Jan 1, 1967 Swynnerton, C.F.M. [125], Zimbabwe K000426780 isotype
Jan 1, 1967 Holst, C. [3582], Tanzania K000426674 isotype
Jan 1, 1966 Cooper, G.P. [300], Liberia K000426560 isotype
Jan 1, 1966 Cooper, G.P. [300], Liberia K000426561 holotype
Jan 1, 1960 Balsinhas, A. [173], Mozambique K000285538
Milne-Redhead, E. [5123], Ghana 17678.000
Brenan, J.P.M. [8316], Tanzania 17679.000
Drummond, R.B. [3607], Tanzania 17680.000

First published in Abh. Königl. Akad. Wiss. Berlin 1894: 36 (1894)

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.
  • Bruce, E.A. & Lewis, J. (1960). Flora of Tropical East Africa, Loganiaceae: 1-47.
  • Exell, A.W. & Wild, H. (eds.) (1960). Flora Zambesiaca 1(1): 1-336. Royal Botanic Gardens, Kew.
  • Fischer, E., Rembold, K., Althof, A. & Obholzer, J. (2010). Annotated checklist of the vascular plants of Kakamega forest, Western province, Kenya Journal of East African Natural History 99: 129-226.
  • Germishuizen, G. & Meyer, N.L. (eds.) (2003). Plants of Southern Africa an annotated checklist Strelitzia 14: 1-1231. National Botanical Institute, Pretoria.
  • Kalema, J. & Beentje, H. (2012). Conservation checklist of the trees of Uganda: 1-235. Kew Publishing, Royal Botanic Gardens, Kew.
  • Leeuwenberg, A.J.M. & Bamps, P. (1979). Flore d'Afrique Centrale (Zaire-rwanda-Burundi), Loganiaceae: 1-149. Jardin Botanique National de Belgique.
  • Lejoy, J., Ndjele, M.-B. & Geerinck, D. (2010). Catalogue-flore des plantes vasculaires des districts de Kisangani et de la Tshopo (RD Congo) Taxonomania 30: 1-307.
  • Sita, P. & Moutsambote, J.-M. (2005). Catalogue des plantes vasculaires du Congo, ed. sept. 2005: 1-158. ORSTOM, Centre de Brazzaville.
  • Thiombiano, A., Schmidt, M., Dressler, S., Ouédraogo, A., Hahn, K. & Zizka, G. (2012). Catalogue des plantes vasculaires du Burkina Faso Boissiera 65: 1-391.

Literature

Flora of West Tropical Africa

  • Bruce & . Lewis in F.T.E.A. Loganiac. 34.
  • E. A. Bruce in Kew Bull. 10: 627, fig. 1B (1956)
  • F.T.A. 4, 1: 526
  • in Engl. Pflanzenw. Ost.-Afr. C: 311 (1895)

Kew Backbone Distributions

  • Fischer, E., Rembold, K., Althof, A. & Obholzer, J. (2010). Annotated checklist of the vascular plants of Kakamega forest, Western province, Kenya Journal of East African Natural History 99: 129-226.
  • Leeuwenberg, A.J.M. & Bamps, P. (1979). Flore d'Afrique Centrale (Zaire-rwanda-Burundi), Loganiaceae: 1-149. Jardin Botanique National de Belgique.
  • Lejoy, J., Ndjele, M.-B. & Geerinck, D. (2010). Catalogue-flore des plantes vasculaires des districts de Kisangani et de la Tshopo (RD Congo) Taxonomania 30: 1-307.
  • Sita, P. & Moutsambote, J.-M. (2005). Catalogue des plantes vasculaires du Congo, ed. sept. 2005: 1-158. ORSTOM, Centre de Brazzaville.
  • Thiombiano, A., Schmidt, M., Dressler, S., Ouédraogo, A., Hahn, K. & Zizka, G. (2012). Catalogue des plantes vasculaires du Burkina Faso Boissiera 65: 1-391.

Flora Zambesiaca
Flora Zambesiaca
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Flora of West Tropical Africa
Flora of West Tropical Africa
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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