Crotalaria rogersii Baker f.

First published in J. Linn. Soc., Bot. 42: 347 (1914)
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

Leguminosae, various authors. Flora Zambesiaca 3:7. 2003

Morphology General Habit
Erect or rarely decumbent perennial herb, with 1–several simple to much branched stems from a woody rootstock (but also flowering in first year of growth), up to 2.7 m tall; branches densely covered with short appressed or crisped hairs.
Morphology Leaves
Leaves 3-foliolate; leaflets mostly 4–8.5 × 1.5–5.5 cm, oblanceolate-elliptic to broadly elliptic or obovate-elliptic, appressed puberulous beneath, often rather glaucous; petiole shorter to longer than the leaflets; stipules 1–4 mm long, filiform to linear-caudate, caducous, or lacking.
Morphology Reproductive morphology Flowers
Flowers similar to C.pallida, but the standard and more particularly the keel often flushed purple; beak of the keel slightly more incurved.
Morphology Reproductive morphology Fruits
Pod shortly stipitate, 2.8–3.5 × 0.6–0.9 cm, subcylindrical, appressed puberulous, often glabrescent, 18–28-seeded.
Morphology Reproductive morphology Seeds
Seeds 3.5–4 mm long, oblique-cordiform, minutely papillose, greenish-brown or mottled.
[FZ]

International Legume Database and Information Service

Conservation
Not Threatened
Ecology
Africa: Zambezian woodland, Zambezian bushland and thicket, Zambezian wooded grassland, Zambezian grassland
Morphology General Habit
Perennial, Not climbing, Herb
[ILDIS]

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

Morphology General Habit
Erect or rarely decumbent perennial, with 1-several simple or much-branched stems from a woody rootstock, up to 2–27 dm. tall, but also flowering in the first year of growth.
Morphology Stem
Stems finely ribbed, densely covered with short appressed or crisped and slightly spreading hairs.
Morphology Leaves
Leaves 3-foliolate; leaflets oblanceolate-elliptic to broadly elliptic or obovate-elliptic, up to 40–85 mm. long, 13–55 mm. wide, glabrous above, thinly appressed puberulous beneath, often glaucous; petiole 20–100 mm. long.
Morphology Leaves Stipules
Stipules filiform or linear-caudate, 1–4 mm. long, caducous, or absent.
Morphology Reproductive morphology Inflorescences
Racemes shortly pedunculate, up to 15–40 cm. long, with many flowers, crowded at least towards the top; bracts filiform, 3–7 mm. long, early caducous; bracteoles inserted at the base of the calyx, filiform or linear-caudate, up to 1–2 mm. long.
Morphology Reproductive morphology Flowers Calyx
Calyx becoming basally truncate and deflexed against the pedicel, 5–7 mm. long, rather densely appressed pubescent; lobes narrow, acuminate, longer than the tube.
Morphology Reproductive morphology Flowers Corolla
Standard elliptic, yellow, veined reddish, glabrous outside; wings little more than half as long as the keel; keel rather shallowly rounded, with a narrow rather projecting untwisted beak, (9–)11–14 mm. long, greenish-yellow, usually suffused with purple.
Morphology Reproductive morphology Fruits
Pod shortly stipitate, subcylindrical, slightly expanded towards the apex, 28–35 mm. long, 8–9 mm. across, appressed puberulous, often glabrescent, ± 18–26-seeded.
Morphology Reproductive morphology Seeds
Seeds oblique-cordiform, ± 4 mm. long, minutely papillose, greenish-brown.
Habitat
Characteristic of Brachystegia woodland, but also extending into deciduous bushland, grassland, lake shores and persisting in pastures and on cultivated land; 900–2550 m.
Distribution
T1 T2 T4 T5 T7
[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: 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

  • 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/

  • 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