Stathmostelma rhacodes K.Schum.

First published in Bot. Jahrb. Syst. 17: 131 (1893)
This species is accepted
The native range of this species is South Sudan to NW. Tanzania. It is a perennial and grows primarily in the seasonally dry tropical biome.

Descriptions

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation
Predicted extinction risk: not threatened. Confidence: confident
[AERP]

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

Morphology General Habit
Perennial herb with a single annual stem arising from a vertical, napiform tuber.
Morphology Stem
Stems erect or ascending, 0.1–0.6 m long, simple or occasionally branched below, minutely pubescent with short white hairs
Morphology Leaves
Leaves sessile or with petiole to 5 mm long; lamina linear, 5–15 × 0.1–1 cm, acute, base truncate or rounded, minutely pubescent with short, stiff hairs on both upper and lower surfaces
Morphology Reproductive morphology Inflorescences
Inflorescences extra-axillary with 2–4 flowers in an erect umbel.
Morphology Reproductive morphology Inflorescences Peduncles
Peduncles erect, 1.5–15(–25) cm long, the lower inflorescences with markedly longer peduncles than the upper ones, thus raising all the flowers to approximately the same level, minutely pubescent.
Morphology Reproductive morphology Inflorescences Bracts
Bracts caducous.
Morphology Reproductive morphology Flowers Pedicel
Pedicels 1.5–5 cm long, pubescent Fruiting pedicel not contorted.
Morphology Reproductive morphology Flowers Calyx
Sepals lanceolate to ovate, 3–6 × 1–2 mm, acute, usually tinged red towards tip, pubescent
Morphology Reproductive morphology Flowers Corolla
Corolla pink to orangered, rotate or slightly reflexed, glabrous on outer surface, minutely papillose towards the base within; lobes oblong to obovate, 9–15 × 4–6 mm, acute, plane
Morphology Reproductive morphology Flowers Gynostegium
Gynostegium with stipe 1–3 mm long
Morphology Reproductive morphology Flowers Corona
Corona lobes erect and arching over head of column, red or orange with orange or yellow teeth, at least twice as tall as column including teeth, main part of lobe glabrous and shiny, 4–7 × ± 2 mm, weakly pouched towards the base on each side of the mid-line, appearing concave-cucullate for most of its length but in fact solid except for the papillose proximal and upper margins, apex rounded distally, the inner apical margins produced abruptly into a pair of teeth, teeth erect or angled away from column, ovate to broadly oblong, 2–3 × 1–2 mm, acute or obliquely truncate apically, often somewhat constricted at the base, a third tooth to 3–4 mm long arising from the middle of the cavity, curved upwards or inwards
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anther wings 2–3 mm long, curved; anther appendages 1–1.5 mm long, semicircular and inflexed over apex of stylar head; corpusculum black, subcylindrical, ± 0.4 × 0.1 mm; translator arms with a membranous, obovate, convex and somewhat contorted proximal part 1.2–1.4 × 0.4 mm, and a filiform distal part 0.5–0.8 mm long broadening abruptly into a clasping overlap with the pollinium.
Morphology Reproductive morphology Flowers Pollinia
Pollinia oblong or obovate, ± 0.8 × 0.3 mm, flattened
Morphology Reproductive morphology Flowers Gynoecium Style
Stylar head flat
Morphology Reproductive morphology Fruits
Follicle erect, fusiform, 10–12 × 0.5 cm, beaked, not inflated, smooth, minutely pubescent when young, glabrous at maturity
Morphology Reproductive morphology Seeds
Seeds ± 8 × 4 mm.
Ecology
Grassland, often where seasonally waterlogged; 900–2300 m
Note
Very similar to the upland form of S. pedunculatum, differing principally in the corona teeth but perhaps also in the subglabrous follicle.
Distribution
Range: South Sudan Flora districts: U2 U3 U4 K2 K3 K4 K5 K6 T1
[FTEA]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0
  • Flora of Tropical East Africa

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

    • 'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    • 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 Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0