Apocynaceae
Secamone

Secamone erythradenia K.Schum.

First published in Bot. Jahrb. Syst. 17: 141 (1893)
This species is accepted
The native range of this species is W. Central Tropical Africa to Zambia. It is a climbing shrub and grows primarily in the seasonally dry tropical biome.

Descriptions

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
Angola, Huilla, wooded parts of Morro de Lopollo, Welwitsch 5941 (K lectotype, C, COI, LISU), lectotype designated here.
Morphology General Habit
Woody climber with twining stems
Morphology General Shoots
Young shoots, petioles, midribs and inflorescences pubescent, the hairs reddish, spreading
Morphology Leaves
Leaves shortly petiolate; petiole 0.7–2.2 mm long; lamina 0.9–3.1 × 0.5–1.4 cm, ovate or ovate-lanceolate, apex acute or occasionally obtuse or rounded, generally apiculate, the base rounded or slightly cordate, lower epidermis smooth, pubescent
Morphology Reproductive morphology Flowers
Flowers solitary or 2–5 in lax, axillary cymes
Morphology Reproductive morphology Inflorescences
Inflorescences 1–2 cm long
Morphology Reproductive morphology Flowers Pedicel
Pedicels 2–5 mm long
Morphology Reproductive morphology Flowers Calyx
Calyx lobes 1.5–2 × 0.7–1 mm, ovate, obtuse
Morphology Reproductive morphology Flowers Corolla
Corolla 3.5–5 mm long, white; tube 2–2.5 mm long, campanulate; lobes 2–3 × c.1 mm, oblong, obtuse; corolline corona of 5 pairs of fleshy ridges stretching from the base of the corolla tube to the corolla lobe sinus, widest about halfway up the tube
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Staminal corona lobes longer than the staminal column, flattened dorsally or triangular in section, free in the upper half and incurved over the stamens, the tip entire or shallowly 3-lobed
Morphology Reproductive morphology Flowers Gynoecium Style
Apical portion of stylar head exserted for up to c.1 mm from the staminal column, ovoid-clavate, bifid, occasionally partially enclosed by the staminal corona lobes
Morphology Reproductive morphology Seeds
Follicles 6.5–7.5 × 0.7–0.8 cm, pubescent towards the base, shallowly striate, fawn to brown, reflexed.
Distribution
Zambia Also known from D.R. Congo and Angola.
Ecology
Mushitu forest and dry evergreen thickets; 1000–1300 m.
[FZ]

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]

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

  • 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 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