Crotalaria ringoetii Baker f.

First published in É.A.J.De Wildeman, Pl. Bequaert. 2: 509 (1924)
This species is accepted
The native range of this species is S. Tanzania to S. Tropical Africa. It is an annual and grows primarily in the seasonally dry tropical biome.

Descriptions

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

Morphology General Habit
Erect laxly branched annual, up to 9 dm. tall.
Morphology Stem
Stem slender, appressed puberulous.
Morphology Leaves
Leaves 1-foliolate; leaflets linear-oblanceolate to oblong -oblanceolate, up to 12–40 mm. long and 1–7 mm. wide, acute to rounded at the apex, glabrous above, appressed puberulous beneath; petiole ± 1–3(–4) mm. long.
Morphology Leaves Stipules
Stipules absent.
Morphology Reproductive morphology Inflorescences
Racemes lax, up to 8–20 cm. long, many-flowered, often with a few other flowers clustered in the axils below; bracts shortly linear-lanceolate, ± 0·5–1·5 mm. long; bracteoles absent.
Morphology Reproductive morphology Flowers Calyx
Calyx 3–4 mm. long, with the tube protracted on the lower side, appressed puberulous with hairs generally dark-coloured at the base; upper lobes narrowly attenuate-triangular, much longer than the tube.
Morphology Reproductive morphology Flowers Corolla
Standard elliptic-obovate, pale yellow with 2 reddish marks at the base inside and reddish veined outside, puberulous apically outside; wings shorter than the keel; keel bent at right-angles in the lower third, with a narrow twisted beak, slightly incurved at the tip, 4–5 mm. long.
Morphology Reproductive morphology Fruits
Pod sessile, subglobose-ovoid, 3–4 mm. long, appressed puberulous, 2-seeded.
Morphology Reproductive morphology Seeds
Seeds orbicular-cordiform, ± 2 mm. long, with a small aril, smooth, brown or purplish tinged.
Habitat
Brachystegia woodland, also persisting as a weed of cultivated ground; 800–1800 m.
Distribution
T4 T7 T8
[FTEA]

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

Morphology General Habit
Erect laxly branching annual 0.2–1 m tall; stem slender, appressed puberulous.
Morphology Leaves
Leaves 1-foliolate; leaflets 10–45 × 1–8 mm, linear-oblanceolate above to oblong-elliptic below, upper ones acute, appressed puberulous beneath; petiole 1–3(4) mm long; stipules 0.
Morphology Reproductive morphology Inflorescences
Racemes 5–25 cm long, laxly many-flowered, with a few other flowers developing in the axils below; bracts 0.5–1.5 mm long, linear to shortly linear-lanceolate; pedicel 2–3(5) mm long, without bracteoles.
Morphology Reproductive morphology Flowers Calyx
Calyx 2.5–3.5 mm long, appressed puberulous with generally brown-based hairs; upper lobes attenuately triangular-lanceolate, 2–2.5 times as long as the tube.
Morphology Reproductive morphology Flowers Corolla
Standard elliptic-obovate, pale yellow, with reddish lines and medially puberulous outside, and with red fringed basal patches inside; wings shorter than the keel; keel 4–5 mm long, angular, with a narrow twisted slightly incurved beak.
Morphology Reproductive morphology Fruits
Pod sessile, 3–3.5 × 3 mm, ovoid-globose, puberulous, 2-seeded.
Morphology Reproductive morphology Seeds
Seeds 2–2.7 mm long, oblique-cordiform, smooth, with a small aril.
[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]

International Legume Database and Information Service

Conservation
Insufficiently known
Ecology
Africa: Zambezian woodland
Morphology General Habit
Annual, Not climbing, Herb
[ILDIS]

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