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This genus is accepted, and its native range is Tanzania to S. Africa.
Riocreuxia torulosa

[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

Cytology
Base chromosome number: 2n = 22 (Albers & Meve 2001: 648)
Morphology General Habit
Perennial herbs with somewhat woody rootstock, producing a tuft of slightly fleshy or sub-fusiform roots
Morphology Leaves
Leaves opposite, petiolate, simple, ovate, base conspicuously cordate, apex acuminate or very rarely acute; interpetiolar stipules of tufts of whitish or brownish-translucent hairs
Morphology Reproductive morphology Flowers
Flowers in laxly branched cymes or in fascicles at 1, 2 or 3 nodes of peduncle or flowering axis
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers dorsiventrally compressed, erect, subquadrate, incumbent on the ± globose or ± truncate stylar head, longer or shorter than staminal lobes; pollinia erect, oblong or elliptic with an acute pellucid margin at apex resembling a small beak, attached in pairs from near base by short caudicles to a small dark-brown corpusculum
Morphology Reproductive morphology Flowers Calyx
Sepals 5, linear-subulate, acuminate
Morphology Reproductive morphology Flowers Corolla
Corolla mostly tubular, straight, rarely campanulate, ± inflated at base; lobes 5, linear-attenuate, erect, shorter or longer than tube, mostly connate at tips to form a subglobose cage-like structure; Corona (1-)2 seriate, variable, subsessile distinctly stipitate
Morphology Reproductive morphology Fruits
Follicles paired, terete-fusiform, acuminate, usually ± beaded from being constricted between the seeds, glabrous or occasionally pubescent (i.e. in some R. torulosa specimens); seed dorsiventrally compressed, linear- elliptic or oblong, curling length-wise on drying to become convex-concave, with a very narrow marginal wing along perimeter, apex with a tuft of white fluffy hairs
Morphology Stem
Stems twining or sometimes suberect and tufted, sometimes becoming woody at base, mostly unifariously puberulous, rarely bifariously puberulous or puberulous all round
Type
Type species: R. torulosa (E. Mey.) Decne.

[FTEA]

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

Morphology General Habit
Perennial herbs with somewhat woody rootstock, producing a tuft of slightly fleshy or sub-fusiform roots.
Morphology General Exudate
Latex clear
Morphology Stem
Stems twining or sometimes suberect and tufted, sometimes becoming woody at base, mostly unifariously (rarely bifariously) puberulous, rarely puberulous all round
Morphology Leaves
Leaves opposite, petiolate, base conspicuously cordate; interpetiolar stipules of tufts of whitish or brownishtranslucent hairs. Flowers in laxly branched cymes or in fascicles at 1, 2 or 3 nodes of peduncle or flowering axis
Morphology Reproductive morphology Flowers Corolla
Corolla mostly tubular, straight or campanulate, ± inflated at base; lobes 5, linear-attenuate, erect, shorter or longer than tube, mostly connate at tips to form a subglobose cage-like structure.
Morphology Reproductive morphology Flowers Corona
Corolline corona absent Gynostegial corona (1–)2 seriate, variable, subsessile, stipitate.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers erect, dorsiventrally compressed, subquadrate, incumbent on the ± globose or ± truncate stylar head, longer or shorter than staminal lobes.
Morphology Reproductive morphology Flowers Pollinia
Pollinia erect, oblong or elliptic with an acute pellucid margin at apex resembling a small beak, attached in pairs from near base by short caudicles to a small dark-brown corpusculum
Morphology Reproductive morphology Fruits
Follicles paired, terete-fusiform, acuminate, usually ± beaded from being constricted between the seeds, glabrous; seed dorsiventrally compressed, linear-elliptic or oblong, curling length-wise on drying to become convex-concave, with a very narrow marginal wing along perimeter, apex with a tuft of white fluffy hairs

Native to:

Angola, Burundi, Cape Provinces, Free State, KwaZulu-Natal, Lesotho, Malawi, Northern Provinces, Rwanda, Swaziland, Tanzania, Zambia, Zimbabwe

Riocreuxia Decne. appears in other Kew resources:

First published in A.P.de Candolle, Prodr. 8: 640 (1844)

Accepted by

  • Albers, F. & Meve, U. (eds.) (2002). Illustrated handbook of succulent plants Asclepiadaceae, corr. 2nd printing: 1-318. Springer, Berlin, Heidelberg,New York.
  • Goyder, S., Harris, T., Masinde, S., Meve, U. & Venter, J. (2012). Flora of Tropical East Africa, Apocynaceae(2): 1-530.

Literature

Flora of Tropical East Africa

  • DC., Prodr. 8: 640 (1844)
  • E. & P. Pf 4(2): 273 (1895)
  • E.J. 18, Beibl. 45: 13 (1894)
  • G.P. 2(2): 780 (1876)
  • Goldblatt & Manning, Cape Plants, Strelitzia 9: 288 (2000)
  • Harv., Gen. S. Afr. Pl. ed. 2: 240 (1868)
  • K.B. 60: 410 (2005)
  • Retief & Herman, Pl. N. Prov. S. Afr., Strelitzia 6: 276 (1997)
  • S. Afr.: 227 (1983);

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