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This species is accepted, and its native range is Mpumalanga to 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, Swaziland, Lesotho.
Ecology
Forest margins; altitude, 900 - 1800 m.
Morphology General Habit
A mostly glabrous leafy climber, 2 m or more high
Morphology Leaves
Leaves herbaceous, spreading; petiole 40 - 50(- 80) mm long, terete, pubescent along rims of adaxial channel; lamina (23 -)60 - 120(- 180) x (16 -)40 - 90(- 130) mm, ovate, elliptic-ovate or rarely basal leaves semi-orbicular, base deeply or shallowly cordate, apex acuminate or occasionally acute or apiculate; deeply cordate leaves with a broad subtruncate sinus between the semi-orbicular incurved or overlapping basal lobes; usually glabrous on both sides but with marginal areas and basal parts of main veins minutely scaberulous, margin entire
Morphology Reproductive morphology Flowers Calyx
Sepals linear-subulate or lanceolate, 2 - 3 x c. 0.5 mm at base, glabrous
Morphology Reproductive morphology Flowers Corolla
Corolla (14 -) 16 - 22 mm long, straight, conspicuously striated; tube cylindric, slightly inflated towards base, (7 -)10 - 15(- 19) mm long x 4 - 5 mm diam., longer than lobes; exterior with longitudinal purple, brown, purple-brown or green veins producing conspicuous striations, interior, green/yellow-cream, glabrous throughout; lobes 4 - 7(- 10) x 1 - 2 mm wide at base, oblong-lanceolate or linear-lanceolate, apically tapering into filiform processes, connate at tips and forming a ± triangular cage-like structure; exterior with purple, brown, purple-brown or greenish striations, interior often yellow-green, glabrous thoughout
Morphology Reproductive morphology Flowers Corona
Corona cupular, width ± twice the height, 1.2 - 1.6 mm high x c. 2.7 mm in diam., subsessile, uniseriate to biseriate, glabrous throughout; outer lobes deltoid, subhorizontally radiating, narrowly channelled at centre, ± confluent at lower level towards base and again at a higher level towards apex, apex entire or notched, teeth parallel; outer lobes sometimes forming a continuous rim even opposite anthers; inner lobes variable in length, rudimentary to ± obsolete or as long as anthers or represented by two tangential ridges confluent with outer lobes; when inner lobes present, dorsiventrally compressed, linear-obtuse, c. 1 x 0.2 mm, as long as or shorter than anthers, usually thin and very closely applied to their backs and connivent over them; guide rails, c. 400 μm long, well exposed, conspicuously cream to yellowish
Morphology Reproductive morphology Flowers Gynoecium Carpels
Carpels glabrous
Morphology Reproductive morphology Flowers Pollinarium
Pollinia c. 300 x 200 μm, elliptic-oblong with an acute pellucid margin at apex; corpusculum elliptic, c. 150 x 70 μm
Morphology Reproductive morphology Fruits
Follicles paired, acutely divergent, cylindrical, apically tapering, 100 - 117 mm long x c. 4 mm diam. at centre, glabrous; seed linear-elliptic, dark brown, c. 8 x 2 mm with a c. 0.1 mm wide paler margin.
Morphology Reproductive morphology Inflorescences
Inflorescence of branched paniculate cymes, 60 - 120(- 170) mm long; bracts linear-subulate, 1 - 2 mm long, glabrous; peduncle 1 - 1.5 mm diam., glabrous, branched at the node into 2 or 3 peduncles and then producing the umbellate cymes but mostly dichotomously or trichotomously branching once or twice before producing flowers; pseudoumbels (5 -)15-flowered, many flowers opening simultaneously; pedicels (17 -) 25 - 35(- 40) mm long, c. 0.5 mm diam., long, slender and pendulous with erect flowers, glabrous
Morphology Stem
Stem produced annually, twining, sparingly branched, stout in older parts, hollow at centre when dry; nodes slightly swollen; internodes 70 - 190 mm long, 2 - 4 mm diam., glabrous or occasionally thinly unifariously puberulous
Note
Riocreuxia picta is readily distinguishable by the striations produced by the purple, brown or purple- brown longitudinal nerves on the corolla and by the corolla lobes that are abruptly narrowed apically into filiform processes. The point of connation is therefore rather weak with the result that in dried specimens, they may become free. The outer corona parts in this species are well developed and complex. Inner corona lobes when present can be quite difficult to distinguish from the anthers because they are thin, linear-obtuse membranous processes that are very tightly adpressed to the backs of anthers and hence appearing to be a part of them. This can be especially problematic when the inner lobes are more or less equal in length and breadth to the anthers. When the corona is wetted in an aqueous solution, the staminal lobes can easily be recognised by gently scraping the backs of the anthers downwards so as to pull them back. They are also smoother, paler and much thinner compared to the less smooth, yellowish, much thicker anthers. Inner lobes are sometimes represented by thin linear processes which are much narrower than the anther and extending to 3/4 way up and very tightly applied to their backs. A careful examination of the dorsal side of the anthers should be made to determine their presence or absence. In most specimens examined during this investigation, the inner corona lobes were at least present. The species is probably more closely related to R. torulosa but it also has many common characters with R. polyantha.
Phenology
Flowering January - April.
Type
South Africa, Transvaal, margins of Makwonga Forest near Barberton, April 1890, Galpin 908 (B†, holotype, K!, lectotype, selected by Huber (1958: 170); PRE, isolectotype).

Native to:

Free State, KwaZulu-Natal, Lesotho, Northern Provinces, Swaziland

Riocreuxia picta Schltr. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Jan 1, 1978 Burtt-Davy, J. [1580], South Africa K000305548
Jan 1, 1978 Galpin, E.E. [908], South Africa K000305547 Unknown type material

First published in Beibl. Bot. Jahrb. Syst. 45: 24 (1894)

Accepted by

  • Germishuizen, G. & Meyer, N.L. (eds.) (2003). Plants of Southern Africa an annotated checklist Strelitzia 14: 1-1231. National Botanical Institute, Pretoria.
  • Retief, E. & Meyer, N.L. (2017). Plants of the Free State inventory and identification guide Strelitzia 38: 1-1236. 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.
  • Retief, E. & Meyer, N.L. (2017). Plants of the Free State inventory and identification guide Strelitzia 38: 1-1236. 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