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This species is accepted, and its native range is Tanzania.
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
Tanzania; endemic to the montane forests in the south of the eastern arc mountains.
Ecology
Montane forest margins; altitude, 1750 - 1850 m.
Morphology General Habit
A hairy, leafy climber to 2 m or more high
Morphology Leaves
Leaves herbaceous, spreading; petiole 18 - 50 mm long, villous all around; lamina 60 - 130 x 30 - 100 mm, broadly ovate, base deeply cordate, apex acuminate, with a broad subtruncate sinus between the semiorbicular incurved or overlapping basal lobes; densely pubescent on both surfaces becoming velvety especially underneath and in young leaves, margin entire, ciliolate
Morphology Reproductive morphology Flowers Calyx
Sepals linear-subulate, 2 - 3 x c. 0.5 mm at base, ± glabrous or sparsely pubescent
Morphology Reproductive morphology Flowers Corolla
Corolla (10 -) 17 mm long, straight; tube subcylindric, slightly inflated towards base, 7 - 10 mm long x 3 - 4 mm diam.; exterior whitish-green or orange-yellow, glabrous; interior apparently somewhat orange-red/yellow glabrous; lobes linear, attenuate, 6 - 10 x 0.5 - 1 mm wide at base, erect, connate at apex to form an oblong- elliptic cage-like structure c. 4 mm diam., orange- red/yellow, glabrous throughout
Morphology Reproductive morphology Flowers Corona
Corona ± subglobose, c. 1.5 x 1.5 mm, subsessile, biseriate, glabrous throughout; outer lobes ± forming 5 small pockets, emarginate or shortly bifid, with c. 0.2 mm long subhorizontally orientated teeth; inner lobes dorsiventrally compressed, linear-obtuse, 0.6 - 0.9 x c. 0.2 mm, slightly longer than anthers, closely applied to their backs and connivent over them; guide rails c. 250 μm long
Morphology Reproductive morphology Flowers Gynoecium Carpels
Carpels glabrous.
Morphology Reproductive morphology Flowers Pollinarium
Pollinia c. 350 x 200 μm, elliptic-oblong with an acute pellucid margin at apex; corpusculum elliptic, c. 150 x 80 μm
Morphology Reproductive morphology Inflorescences
Inflorescence of long, branched, pedunculate cymes up to 140 mm long; bracts linear- subulate, c. 2 x 0.3 mm at base, ± glabrous to sparsely pubescent
Morphology Reproductive morphology Inflorescences Peduncles
Peduncle 1 - 1.5 mm diam., densely pubescent all round, 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 up to 30+ -flowered, somewhat congested because the branches bearing fascicles are shorter and not widely variably in length, many flowers opening simultaneously; pedicels 10 - 24 mm, long and slender, glabrous or pubescent
Morphology Stem
Stem twining, branched, stout in older parts, dry stems hollow at centre; nodes with a distinct ring of simple, minute (c. 1 mm long) brownish-translucent multicellular hairs; internodes 60 - 200(- 275) mm long, 1.5 - 5 mm diam., villous all round
Note
This species is closest to Riocreuxia polyantha in vegetative form, corolla form and corona parts. R. splendida occurs north of the more widely distributed R. polyantha It is distinguished from R. polyantha and R. chrysochroma by the whitish/brownish-translucent densely villous hairs all around the stems and peduncles, and sometimes pedicels and sepals. The leaf blades appear thicker than in R. polyantha and are densely pubescent becoming villous especially underneath and in new growth The only other collections with a tendency towards that density of hairiness are some populations of the southern African R. torulosa. The pubescence in R. torulosa is, however, thinner and shorter, and the coronas in the two species are quite distinct

In R. splendida, the peduncles are less branched and the umbellate fascicles are somewhat congested and not well spaced and lax as in R. polyantha. The corolla is also more intense orange-yellow more or less throughout

Phenology
Flowering February - March.
Type
Tanzania, Uhehe near Makombe, on moist bank of stream, 1800 m, Feb. 1899, Goetze 681 (B†, holotype); Tanzania, Mbeya Distr., N slopes of Poroto Mts, 3 March 1932, St. Clair- Thompson 722 (K!, 2 sh., neotype, selected by Huber (1958)).

[FTEA]

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

Morphology General Habit
Climber, hairy, leafy to 2 m or more high.
Morphology Stem
Stem twining, branched, stout in older parts, villous all round, dry stems hollow at centre; nodes with a distinct ring of simple, ± 1 mm long brownish-translucent hairs
Morphology Leaves
Leaves herbaceous, spreading; petiole 18–50 mm long, villous all around; lamina broadly ovate, 60–130 × 30–100 mm, base deeply cordate, apex acuminate, with a broad subtruncate sinus between the semiorbicular incurved or overlapping basal lobes, densely pubescent on both surfaces becoming velvety especially underneath and in young leaves, margin ciliolate
Morphology Reproductive morphology Inflorescences
Inflorescence of long, branched, pedunculate cymes up to 140 mm long; peduncle densely pubescent, branching into up to 3 branches, each branch in turn mostly dichotomously or trichotomously branching once or twice; pseudoumbels up to 30+-flowered, somewhat congested, many flowers opening simultaneously.
Morphology Reproductive morphology Inflorescences Bracts
Bracts linear-subulate, ± 2 × 0.3 mm at base, ± glabrous to sparsely pubescent.
Morphology Reproductive morphology Flowers Pedicel
Pedicels 10–24 mm, glabrous or pubescent
Morphology Reproductive morphology Flowers Calyx
Sepals linear-subulate, 2–3 × ± 0.5 mm, ± glabrous or sparsely pubescent
Morphology Reproductive morphology Flowers Corolla
Corolla (10–)17 mm long, straight; tube subcylindric, slightly inflated towards base, 7–10 mm long × 3–4 mm diameter, exterior whitish-green or orange-yellow, glabrous, interior apparently somewhat orange-red/yellow; lobes erect, orange-red/yellow, linear, 6–10 × 0.5–1 mm, attenuate, connate at apex to form an oblong-elliptic cage-like structure ± 4 mm diameter, glabrous throughout.
Morphology Reproductive morphology Flowers Corona
Corona ± subglobose, ± 1.5 × 1.5 mm, subsessile, biseriate, glabrous throughout; outer lobes ± forming 5 small pockets, emarginate or shortly bifid, with ± 0.2 mm long subhorizontally orientated teeth; inner lobes linear-obtuse, 0.6–0.9 × ± 0.2 mm, slightly longer than anthers, closely applied to their backs and connivent over them; guide rails ± 0.25 mm long
Morphology Reproductive morphology Flowers Pollinia
Pollinia elliptic-oblong, 0.35 × 0.2 mm; corpusculum elliptic, ± 0.15 × 0.08 mm
Morphology Reproductive morphology Flowers Gynoecium Carpels
Carpels glabrous
Morphology Reproductive morphology Fruits
Follicles and seed unknown.
Ecology
Montane forest margins; 1750–1850 m
Note
Further field work may reveal that R. splendida is within the range of variation of R. polyantha.
Distribution
Range: Not known elsewhere Flora districts: T5 T7

Native to:

Tanzania

Riocreuxia splendida K.Schum. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
St. Clair-Thompson [722], Tanzania K000305552 neotype
St. Clair-Thompson [722], Tanzania K000305553 neotype

First published in Bot. Jahrb. Syst. 28: 460 (1900)

Accepted by

  • Goyder, S., Harris, T., Masinde, S., Meve, U. & Venter, J. (2012). Flora of Tropical East Africa, Apocynaceae(2): 1-530.

Literature

Kew Backbone Distributions

  • Goyder, S., Harris, T., Masinde, S., Meve, U. & Venter, J. (2012). Flora of Tropical East Africa, Apocynaceae(2): 1-530.

Flora of Tropical East Africa

  • E.J. 28: 460 (1900)
  • F.T.A. 4(1): 466 (1903)
  • K.B. 60: 412, fig. 2 (2005).

Flora of Tropical East Africa
Flora of Tropical East Africa
http://creativecommons.org/licenses/by-nc-sa/3.0

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