Stathmostelma spectabile (N.E.Br.) Schltr.

First published in Bot. Jahrb. Syst. 51: 138 (1913)
This species is accepted
The native range of this species is Tanzania to S. Tropical Africa. 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 several annual stems arising from a slender or stout vertical tuber to 2 m long.
Morphology Stem
Stems erect, 0.5–1.5 m long, generally unbranched, densely pubescent with short white hairs. Leaves with petiole 5–20(–30) mm long, pubescent; lamina oblong or elliptic to ovate, 10–24 × 4–12 cm, apex acute or obtuse, base rounded to truncate, occasionally somewhate cuneate, both upper and lower surfaces with a dense indumentum of spreading white hairs
Morphology Reproductive morphology Inflorescences
Inflorescences extra-axillary with 4–12(–15) flowers in an erect umbel.
Morphology Reproductive morphology Inflorescences Peduncles
Peduncles erect, (1–)3–10 cm long, densely spreadingpubescent.
Morphology Reproductive morphology Flowers Calyx
Sepals linear-lanceolate, (4–)8–16 × 1–2 mm, acute, densely pubescent
Morphology Reproductive morphology Flowers Corolla
Corolla rotate to broadly campanulate, glabrous or pubescent at least towards tip on outer surface, minutely papillose within; lobes ovate to oblong or oblanceolate, 15–20(–30) × 6–10 mm, acute or obtuse
Morphology Reproductive morphology Flowers Gynostegium
Gynostegium shortly stipitate
Morphology Reproductive morphology Flowers Corona
Corona lobes arising just above the base of the staminal column and adnate to it to the base of the anthers, erect and somewhat fleshy, the free part longer than the staminal column, 8–12 × 2–4 mm, weakly pouched towards the base and concavecucullate for most of its length, apex rounded, the inner apical margins produced into a pair of inward-pointing teeth 2–3 mm long, with or without a tooth arising from the middle of the cavity, glabrous except along the midline of the cavity towards the base of the lobe
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anther wings 3–4 mm long, curved; anther appendages 2–3 mm long, semicircular and inflexed over apex of stylar head; corpusculum black, ovoid, 0.4–0.5 × 0.2 mm; translator arms with a membranous, obovate, convex and somewhat contorted proximal part 2–2.5 × 0.6–1 mm, and a filiform distal part ± 1.5 mm long broadening abruptly into a short clasping overlap with the pollinium.
Morphology Reproductive morphology Flowers Pollinia
Pollinia oblong, ± 1.5 × 0.4 mm, flattened
Morphology Reproductive morphology Flowers Gynoecium Style
Stylar head white or green, flat
Morphology Reproductive morphology Flowers Pedicel
Fruiting pedicel not contorted. Pedicels 2–5 cm long, pubescent
Morphology Reproductive morphology Fruits
Follicle erect, ovoid to fusiform, beaked, inflated or not, smooth or with weak longitudinal ridges, densely pubescent
Morphology Reproductive morphology Seeds
Seeds ± 5 × 3 mm; coma ± 4 cm long
Figures
Fig 101, p 411
[FTEA]

Goyder, D. J., Gilbert, M. G. & Venter, H. J. T. (2020). Apocynaceae (part 2). In: M. A. García (ed.), Flora Zambesiaca, Vol. 7(3). Royal Botanic Gardens, Kew.

Type
Malawi, 1891, Buchanan 553 (K lectotype), designated by Bullock in Kew Bull. 15: 196 (1961).
Morphology General Habit
Perennial herb with several annual stems arising from a slender or stout vertical tuber to 2 m long; stems 0.5–1.5 m long, generally unbranched, erect, densely pubescent with short white hairs
Morphology Leaves
Leaves with petiole 5–20(30) mm long, pubescent; lamina 10–24 × 4–12 cm, oblong or elliptic to ovate, apex acute or obtuse, base rounded to truncate, occasionally somewhate cuneate, both upper and lower surfaces with a dense indumentum of spreading white hairs
Morphology Reproductive morphology Inflorescences
Inflorescences extra-axillary with 4–12(15) flowers in an erect umbel, peduncles (1)3–10 cm long, erect, densely spreading-pubescent; pedicels 2–5 cm long, pubescent
Morphology Reproductive morphology Flowers Calyx
Sepals (4)8–16 × 1–2 mm, linear-lanceolate, acute, densely pubescent Sepals (4)8–16 × 1–2(5) mm, linear-lanceolate to lanceolate, acute
Morphology Reproductive morphology Flowers Corolla
Corolla rotate to broadly campanulate, glabrous or pubescent at least towards tip on outer surface, minutely papillose within; lobes 15–20(30) × 6–10 mm, ovate to oblong or oblanceolate, acute or obtuse Corolla red or orange; lobes weakly to strongly replicate
Morphology Reproductive morphology Flowers Gynostegium
Gynostegium shortly stipitate
Morphology Reproductive morphology Flowers Corona
Corona lobes arising just above the base of the staminal column and adnate to it to the base of the anthers, the free portion longer than the staminal column, 8–12 × 2–4 mm, erect and somewhat fleshy, weakly pouched towards the base and concave-cucullate for most of its length, apex rounded, the inner apical margins produced into a pair of inward-pointing teeth 2–3 mm long, with or without a tooth arising from the middle of the cavity, glabrous except along the midline of the cavity towards the base of the lobe Corona lobes red, orange or yellow, sometimes paler at the margins, with a slender or robust tooth to 3 mm long in the cavity
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anther wings 3–4 mm long, curved; anther appendages c.2–3 mm long, semicircular and inflexed over apex of stylar head
Morphology Reproductive morphology Flowers Gynoecium Style
Stylar head flat, white or green
Morphology Reproductive morphology Fruits
Fruiting pedicel not contorted; follicle erect, ovoid to fusiform, beaked, inflated or not, smooth or with weak longitudinal ridges, densely pubescent
Morphology Reproductive morphology Seeds
Seeds c.5 × 3 mm, ovate with a verrucose disc and a narrow inflated rim; coma c.4 cm long. Follicle 10–14 × 1.5–2 cm, fusiform, not inflated, smooth or with weak longitudinal ridges.
Morphology Reproductive morphology Inflorescences Bracts
Bracts filiform
Distribution
Zambia, Zimbabwe, Malawi. Also found in Tanzania
Ecology
Growing among grass in seasonally waterlogged grassland and in Brachystegia or mixed deciduous woodland, often in rocky ground or on limestone; 1000–1900 m.
[FZ]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0
  • Flora Zambesiaca

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

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

  • 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