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

[KBu]

P. Siro Masinde. (2005). A Revision of the African Genus Riocreuxia Decne. (Apocynaceae: Asclepiadoideae-Ceropegieae). Kew Bulletin, 60(3), 401-434. Retrieved from http://www.jstor.org/stable/4111063

Distribution
South Africa.
Ecology
Grassveld; altitude, c. 700 m.
Morphology General Habit
A sparsely hairy, leafy climber, 1 m or more high
Morphology Leaves
Leaves herbaceous, spreading; petiole 8 - 40 mm long, terete, pubescent all round or only along rims of adaxial channel; lamina 20 - 75 x 12 - 55 mm, broadly or elongated ovate, base deeply cordate, apex acuminate; with a broad subtruncate sinus between the semiorbicular incurved or overlapping basal lobes; sparsely and rather minutely pubescent on both sides to more or less glabrescent, lower surface sometimes more densely pubescent, margin entire, ciliolate
Morphology Reproductive morphology Flowers Calyx
Sepals linear-subulate, 2 - 3 x 0.3 - 0.5 mm at base, glabrous
Morphology Reproductive morphology Flowers Corolla
Corolla 7 - 12 mm long, straight, glabrous throughout; tube subcylindric, ± contracted at mouth, 3 - 5 mm long x 2 - 4(- 5) mm diam.; exterior whitish or pale yellow interior probably similarly coloured: lobes linear or linear-filiform, 4 - 6 x 0.3 - 0.5 mm wide at base, arching to connate tips to form an ellipsoid or subglobose cage-like structure 4 - 5 mm diam., pale yellowish or somewhat orange at base and purple brown much of the length above
Morphology Reproductive morphology Flowers Corona
Outer lobes narrowly triangular or ± oblong, upcurving-erect as high as or higher than stylar head with apex obtuse or bifid, c. 1.2 x 0.5 mm broad at base.
Morphology Reproductive morphology Flowers Gynoecium Carpels
Carpels glabrous
Morphology Reproductive morphology Flowers Pollinarium
Pollinia c. 290 - 400 x 160 μm, elliptic. oblong with an acute pellucid margin at apex; corpusculum elliptic, 140 x 60 μm
Morphology Reproductive morphology Fruits
Follicles paired, acutely divergent, cylindrical, apically tapering, c. 115 x 3 mm diam. at centre, only slightly beaded; seed dorsiventrally compressed, linear- oblong, c. 10 x c. 2 mm, dark brown or blackish with a paler margin, concave on one side; coma c. 20 mm long.
Morphology Reproductive morphology Inflorescences
Inflorescence of short compact sessile, subsessile or rarely shortly pedunculate umbellate cymes up to 15 (- 20) mm long; bracts subulate, c. 2 - 3 mm long, glabrous; peduncle 0 - 3(- 15) mm long, c. 1 mm diam., puberulous or glabrous, with 1(- 2) rather dense ± terminal clusters of flowers, 5 - 15-flowered; pedicels 2 - 6 mm, c. 0.3 mm diam., sparsely pubescent or glabrous
Morphology Stem
Stem produced annually, twining, branching, stout in older parts; nodes with a distinct ring of simple, whitish/brownish-translucent multicellular hairs; internodes 15 - 110 mm long, 1.5 - 3 mm diam., uni- or bifariously pubescent
Note
On the type sheet, it is noted that the corolla tube is white and the corolla lobes red-brown. The only specimen of var. alexandrina has clearly pedunculate cymes. However, there are specimens of var. flanaganii with a mixture of sessile and pedunculate cymes (e.g. Pegler 214) and this character appears to be quite variable.
Phenology
Flowering in December.
Type
South Africa, Natal, Alexandra Distr., Station Dumisa, Moyeni, 700 m, 6 Dec. 1911, Rudatis 1540 (BM!, holotype!; K!, PRE, isotypes).

Native to:

KwaZulu-Natal

Riocreuxia alexandrina (H.Huber) R.A.Dyer appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Rudatis, H. [1540], South Africa K000305696 isotype

First published in Bothalia 13: 436 (1981)

Accepted by

  • Germishuizen, G. & Meyer, N.L. (eds.) (2003). Plants of Southern Africa an annotated checklist Strelitzia 14: 1-1231. National Botanical Institute, Pretoria.

Literature

Kew Backbone Distributions

  • Germishuizen, G. & Meyer, N.L. (eds.) (2003). Plants of Southern Africa an annotated checklist Strelitzia 14: 1-1231. National Botanical Institute, Pretoria.

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 Bulletin
Kew Bulletin
http://creativecommons.org/licenses/by-nc-sa/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