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This species is accepted, and its native range is S. Mozambique 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

Morphology General Habit
A mostly hairy, leafy climber to 3 m or more high
Morphology Leaves
Leaves herbaceous, spreading; petiole 15 - 60(- 80) mm long, terete, pubescent all around; lamina 30 - 90(- 157) x 17 - 60 (- 135) mm, ovate to broadly so, base deeply cordate, apex acuminate, occasionally acute, with a broad subtruncate sinus between the semiorbicular incurved or overlapping basal lobes; usually somewhat adpressed-pubescent on both sides, occasionally more or less glabrous, margin entire, ciliolate
Morphology Reproductive morphology Flowers Calyx
Sepals linear-subulate or lanceolate, acuminate, c. 2 - 4 x 0.5(- 0.7) mm at base, abaxially pubescent, occasionally ± glabrous
Morphology Reproductive morphology Flowers Corolla
Corolla (10 -) 12 - 18(- 20) mm long, straight, glabrous throughout, pale yellow or cream, occasionally more or less tinged with red, purplish or green; tube cylindric, ovoid-inflated at the base, 6 - 10(- 12) mm long x 2 - 4 mm diam.; lobes linear-attenuate, 5 - 8(- 10) x (0.5 -)1 mm wide at base, connivent-erect, connate at tips to form an ellipsoid or subglobose cage-like structure c. 5 mm diam., occasionally lobes orange-yellow, glabrous
Morphology Reproductive morphology Flowers Corona
Corona quite variable in general shape and diam.; ± oblong without subulate processes projecting from the sides to ± octopus-like due to the many processes radiating from the sides, 0.7 - 1 x 1 - 2.5 mm, with a conspicuous stipe 0.5 - 1 mm long, biseriate, glabrous throughout, yellowish with purple in parts; corona and staminal column usually visible through the thin membranous corolla when dry; outer lobes ± narrowly to broadly deltoid with long or short subulate or filiform processes, entire or bifid; 0.3 - 1.5 mm long x 0.2 - 0.4 mm wide near base, horizontally radiating high above the base of the stipe, yellowish or purple, adaxially shallow concave or channelled in the basal area; the filiform/subulate processes alternating with five pairs of minute or elongated teeth placed just below or forming one series with them, sometimes the teeth nearly or obsolete; inner lobes rudimentary, reaching to about the base of the anthers, rarely reaching halfway up the anthers (in var. bolusii), dorsiventrally compressed, closely applied to backs of anthers, oblong-obtuse, 0.1 - 0.2 mm long x 0.1 - 0.15 mm wide, rarely represented by an upward pointing claw-like process at the base of the anther; guide rails 200 - 400 μm long
Morphology Reproductive morphology Flowers Pollinarium
Pollinia 200 - 250 x 130 - 150 μm, elliptic. oblong with an acute pellucid margin at apex; corpusculum elliptic, 100 x 50 μm; carpels densely pubescent to completely glabrous
Morphology Reproductive morphology Fruits
Follicles subparallel or curved, cylindrical, apically tapering, (75 -) 180 - 100 (- 120) mm long x c. 3 mm diam. at centre, beaded due to conspicuous constrictions between seeds, glabrous or rarely pubescent; seed dorsiventrally compressed, linear-elliptic, 5 - 9 x c. 2 mm, dark brown or blackish with a c. 0.2 mm wide paler margin, concave on one side; coma c. 20 mm long.
Morphology Reproductive morphology Inflorescences
Inflorescence branched, paniculate cymes up to 100(- 150) mm long; bracts linear-subulate, 0.7 - 2 x c. 0.2 mm, abaxially mostly pubescent, rarely glabrous; peduncle 1 - 2 mm diam., variably puberulous, branching at the node or at a distance into up to 3 branches, each branch in turn mostly dichotomously or trichotomously branching once or twice to produce the profusely flowering terminals, pseudoumbels, 6 - 15-flowered, many flowers opening simultaneously; peduncles 1 - 3 at each node, 8 - 90 mm long, subhorizontally orientated (pendant), pubescent, bearing 2 - 3 distant umbellate fascicles (rarely only one fascicle) of 6 - 15 flowers, with or without an additional sessile fascicle at the node; pedicels 10 - 35 (- 40) mm, c. 0.2 mm diam., delicately long and slender, mostly pubescent all round, occasionally glabrous all round or minutely pubescent on the upper part and glabrous below
Morphology Stem
Stem twining, branched, stout in older parts; nodes slightly swollen, with a ring of simple, minute (c. 0.6 mm long) whitish-translucent multicellular hairs; internodes 11 - 60 mm long, 1.5 - 3(- 5) mm diam., mostly pubescent all round, occasionally unifariously or vaguely bifariously pubescent
Type
South Africa, Eastern Cape, King Williamstown Division, near Kachu, 6 Jan. 1832, Drege 4944 (K!, lectotype, fragment, selected by Dyer (1980)).

Native to:

Cape Provinces, Free State, KwaZulu-Natal, Lesotho, Mozambique, Northern Provinces

Riocreuxia torulosa Decne. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Jan 1, 1978 Sankey, H.J. [316], South Africa K000305542 Unknown type material
Jan 1, 1978 Wood, J.M. [4539], South Africa K000305541 Unknown type material
Jan 1, 1978 Cooper, T. [2719], South Africa K000305540 Unknown type material
Jan 1, 1978 Leendertz, R. [708], South Africa K000305543 Unknown type material
Jan 1, 1978 Junod, H.A. [724], South Africa K000305544 Unknown type material
Jan 1, 1978 Drege [2270], South Africa K000305546
Drege [4944], South Africa K000305545 Unknown type material

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

Accepted by

  • Germishuizen, G. & Meyer, N.L. (eds.) (2003). Plants of Southern Africa an annotated checklist Strelitzia 14: 1-1231. National Botanical Institute, Pretoria.
  • Goyder, D.J., Gilbert, M.G. & Venter, H.J.T. (2020). Flora Zambesiaca 7(3): 1-375. Royal Botanic Gardens, Kew.

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.
  • Goyder, D.J., Gilbert, M.G. & Venter, H.J.T. (2020). Flora Zambesiaca 7(3): 1-375. Royal Botanic Gardens, Kew.

Art and Illustrations in Digifolia
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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 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

Kew Science Photographs
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