Stathmostelma angustatum K.Schum.

First published in Bot. Jahrb. Syst. 17: 132 (1893)
This species is accepted
The native range of this species is Ethiopia to NW. Tanzania. It is a perennial or tuberous geophyte and grows primarily in the seasonally dry tropical biome.


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.

Predicted extinction risk: not threatened. Confidence: confident

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 branched annual stem arising from a slender to stout napiform tuber.
Morphology Stem
Stem erect or ascending, 15–25 cm long, branched from near the ground, minutely pubescent with short white hairs
Morphology Leaves
Leaves with petiole to 5 mm long; lamina linear, 4–18 × 0.1–0.9 cm, acute, base cuneate, indumentum mostly restricted to margins and midvein.
Morphology Reproductive morphology Inflorescences
Inflorescences extra-axillary with 3–4 flowers in an erect umbel.
Morphology Reproductive morphology Inflorescences Peduncles
Peduncles 1.5–8 cm long, the lower inflorescences generally with longer peduncles than the upper ones, erect, minutely pubescent.
Morphology Reproductive morphology Inflorescences Bracts
Bracts filiform, pubescent.
Morphology Reproductive morphology Flowers Calyx
Sepals triangular to broadly ovate, 4–8 × 2–4 mm, acute, subglabrous to densely pubescent
Morphology Reproductive morphology Flowers Corolla
Corolla rotate to slightly reflexed, subglabrous on outer surface, minutely papillose within; lobes ovate, 12–14 × 5–6 mm, acute
Morphology Reproductive morphology Flowers Gynostegium
Gynostegium sessile
Morphology Reproductive morphology Flowers Corona
Corona lobes erect, white or green speckled with purple above on the outer surface, 6–10 × 4–6 mm, 1–1.5 times as long as column, concave-cucullate for most of their length, weakly pouched either side of the midline towards the base, apex rounded distally, the inner apical margins produced into a pair of inward-pointing acute teeth, inner margins of lobe papillose, cavity without a median tooth
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anther wings 3–4 mm long, curved, the basal tails curled under the anthers; anther appendages ± 1.5 mm long, semicircular and inflexed over apex of stylar head; corpusculum black, obovoid to subcylindrical, 0.6 × 0.2 mm; translator arms with a membranous, obovate, convex and somewhat contorted proximal part 2–3 × 0.6–0.7 mm, and a filiform distal part ± 1 mm long broadening abruptly into a clasping overlap with the pollinium.
Morphology Reproductive morphology Flowers Pollinia
Pollinia oblong, ± 1 × 0.3 mm, flattened
Morphology Reproductive morphology Flowers Gynoecium Style
Stylar head flat.
Morphology Reproductive morphology Flowers Pedicel
Fruiting pedicel not contorted. Pedicels 1.5–3 cm long, minutely pubescent
Morphology Reproductive morphology Fruits
Follicle erect, narrowly fusiform, 12–14 × 0.5–1 cm, with a basal stipe, not inflated, smooth, minutely pubescent
Morphology Reproductive morphology Seeds
Seeds ± 5 × 2–3 mm.


  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
  • Flora of Tropical East Africa

    • Flora of Tropical East Africa
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  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at and
    • © Copyright 2023 World Checklist of Vascular Plants.
  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at and
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants.