Stathmostelma diversifolium Goyder

First published in Kew Bull. 53: 604 (1998)
This species is accepted
The native range of this species is S. Ethiopia to N. Tanzania. It is a perennial or tuberous geophyte and grows primarily in the seasonally dry tropical biome.

Descriptions

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 long, slender or more usually stout, napiform tuber.
Morphology Stem
Stem erect or ascending, 6–30 cm long, branched from near the ground, minutely pubescent with short white hairs
Morphology Leaves
Leaves with petiole 1–10 mm long; lamina linear to lanceolate or oblong, 4–10 × 0.1–3 cm, acute, base cuneate or truncate, minutely pubescent with short, stiff hairs on both upper and lower surfaces.
Morphology Reproductive morphology Inflorescences
Inflorescences extra-axillary with up to 4 flowers in an erect umbel.
Morphology Reproductive morphology Inflorescences Peduncles
Peduncles erect, 0.5–2(–6) cm long, the lower inflorescences with or without longer peduncles than the upper ones, minutely pubescent.
Morphology Reproductive morphology Inflorescences Bracts
Bracts caducous.
Morphology Reproductive morphology Flowers Calyx
Sepals triangular, 2–7 × 1–2 mm, acute, densely pubescent
Morphology Reproductive morphology Flowers Corolla
Corolla reflexed, dull yellow-green to white or pink, pubescent at least towards tip on outer surface, glabrous within; lobes strongly revolute, ovate, 7–15 × 3–4(–8) mm, acute
Morphology Reproductive morphology Flowers Gynostegium
Gynostegium with stipe 1–3 mm long
Morphology Reproductive morphology Flowers Corona
Corona lobes erect, white speckled with purple above on the outer surface, 4–7(–10) × 3–5(–7) mm, 1–2 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 acute teeth and a laterally flattened, entire or bifid tooth 1.5–3(–4) × 0.6–1(–1.5) mm arising from the middle of the cavity, inner margins of lobe papillose
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anther wings 2.5–4 mm long, curved; anther appendages ± 1.5 mm long, semicircular and inflexed over apex of stylar head; corpusculum black, obovoid to subcylindrical, 0.5–0.6 × 0.2 mm; translator arms with a membranous, obovate, convex and somewhat contorted proximal part 1.6–2 × 0.6–1 mm, and a filiform distal part 1–1.6 mm long broadening abruptly into a short clasping overlap with the pollinium.
Morphology Reproductive morphology Flowers Pollinia
Pollinia oblong, 1–1.6 × 0.3–0.5 mm, flattened.
Morphology Reproductive morphology Flowers Gynoecium Style
Stylar head flat
Morphology Reproductive morphology Flowers Pedicel
Fruiting pedicel not contorted. Pedicels 1–3 cm long, minutely pubescent
Morphology Reproductive morphology Fruits
Follicle erect, ovoid, 5–7 × 1.5–2 cm, with an attenuate beak, not inflated, with 1 or more lines of weakly developed teeth along the dorsal surface, densely pubescent
Figures
Fig 102, p 420
Ecology
Open grassland; 1100–1800 m
Distribution
Flora districts: K1 K4 K6 T1 T2 Range: Southern Ethiopia
[FTEA]

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: threatened. Confidence: confident
[AERP]

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