Fabaceae
Humularia

Humularia drepanocephala (Baker) P.A.Duvign.

First published in Bull. Soc. Roy. Bot. Belgique 86: 190 (1954)
This species is accepted
The native range of this species is Tanzania to Zambia. It grows primarily in the seasonally dry tropical biome.

Descriptions

Leguminosae, B. Verdcourt. Flora Zambesiaca 3:6. 2000

Morphology General Habit
Erect herb or subshrub 20–40 cm tall.
Morphology Stem
Stems tufted, woody, ± densely pubescent with hairs which are not or scarcely bulbous-based, but glabrescent towards the base; rootstock massive, woody.
Morphology Leaves
Leaves 2-foliolate (rarely 4-foliolate); leaflets subsessile, 7–27 × 7–18 mm, obliquely obcordate, the main nerve dividing the blade into very unequal parts, the smaller part two-thirds to the same height as and one-twelfth to two-thirds the width of the larger part, cuneate, glabrous, entire or sparsely and very finely denticulate, sometimes only at the apex; petiole 4–20 mm long; stipules 9–28 × 6–20 mm, elliptic, obovate or deltoid, obtuse at the apex, unequally auriculate at the base, leaf-like, entire or finely ciliate-denticulate, glabrous, persistent.
Morphology Reproductive morphology Inflorescences
Inflorescences 8–15-flowered; peduncle 2–7 mm long, densely hairy; rhachis 3–6 cm long; pedicels 3–4 mm long; bracts yellow-green, 11–17 × 10–18 mm, split for one-seventh to one-half of their length into 2 obtuse to acuminate, apiculate, entire or denticulate lobes, glabrous; bracteoles 2–3 × 0.5–1 mm, lanceolate, entire, glabrous.
Morphology Reproductive morphology Flowers Calyx
Calyx 7–9 mm long, glabrous.
Morphology Reproductive morphology Flowers Corolla
Standard cream to orange-yellow, 9–11 × 4–4.5 mm, panduriform; wings pale yellow.
Morphology Reproductive morphology Fruits
Fruit of 1 article, 5–6.5 × 4.5–5 mm, semicircular, glabrous.
[FZ]

Leguminosae, J. B. Gillett, R. M. Polhill & B. Verdcourt. Flora of Tropical East Africa. 1971

Morphology General Habit
Erect herb or subshrub 20–40 cm. tall.
Morphology Stem
Stems tufted, woody, ± densely pubescent with hairs which are not or scarcely bulbous-based, but glabrescent towards the base; rootstock massive, woody.
Morphology Leaves
Leaves 2-foliolate; leaflets subsessile, obliquely obcordate, 0.7–2.7 cm. long, 0.7–1.8 cm. wide, the main nerve dividing the blade into very unequal parts, the smaller part two-thirds to the same height and one-twelfth to two-thirds the width of the larger part, cuneate, glabrous, entire or sparsely and very finely denticulate sometimes only at the apex; petiole 0.4–2 cm. long; stipules elliptic, obovate or deltoid, 0.9–2.8 cm. long, 0.6–2 cm. wide, obtuse at the apex, unequally auriculate at the base, leafy, entire or finely ciliate-denticulate, glabrous, persistent.
Morphology Reproductive morphology Inflorescences
Inflorescences 8–15-flowered; rhachis 3–6 cm. long; peduncle 2–7 mm. long, densely hairy; pedicels 3–4 mm. long; bracts yellow-green, 1.1–1.7 cm. long, 1–1.8 cm. wide, split for one-seventh to one-half of their length into 2 obtuse to acuminate, apiculate, entire or denticulate lobes, glabrous; bracteoles lanceolate, 2–3 mm. long, 0.5–1 mm. wide, entire, glabrous.
Morphology Reproductive morphology Flowers Calyx
Calyx 7–9 mm. long, glabrous.
Morphology Reproductive morphology Flowers Corolla
Standard cream to orange-yellow, panduriform, 0.9–1.1 cm. long, 4–4.5 mm. wide; wings pale yellow.
Morphology Reproductive morphology Fruits
Pods of 1 article, semicircular, 5–6.5 mm. long, 4.5–5 mm. wide, glabrous.
[FTEA]

International Legume Database and Information Service

Conservation
Not Threatened
Ecology
Africa: Zambezian woodland, Afromontane grassland
Morphology General Habit
Perennial, Not climbing, Herb/Shrub
[ILDIS]

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]

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/179627/1584545

Conservation
LC - least concern
[IUCN]

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

    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

  • IUCN Categories

    • IUCN Red List of Threatened Species
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • International Legume Database and Information Service

    • International Legume Database and Information Service (ILDIS) V10.39 Nov 2011
    • 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

  • World Checklist of Vascular plants (WCVP)

    • 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