Crotalaria glauca Willd.

First published in Sp. Pl., ed. 4. 3: 974 (1802)
This species is accepted
The native range of this species is Tropical Africa. It is an annual or subshrub 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 or spreading annual or short-lived perennial, up to 5–12(–18) dm. tall, slender-stemmed, laxly branched above, glabrous or practically so.
Morphology Leaves
Leaves subsessile, simple; blade varying from linear to oblong-lanceolate or elliptic, up to 10–85 mm. long, 2–10 mm. wide, glaucous.
Morphology Leaves Stipules
Stipules absent.
Morphology Reproductive morphology Inflorescences
Racemes lax, up to 4–15(–20) cm. long, 3–12-flowered; bracts linear to narrowly elliptic, 1–9 mm. long; bracteoles inserted on the pedicel, filiform, small.
Morphology Reproductive morphology Flowers Calyx
Calyx 4–6(–7) mm. long, glabrous or sparsely puberulous; lobes narrow, much longer than the tube.
Morphology Reproductive morphology Flowers Corolla
Standard suborbicular, pale yellow, veined brown outside; wings longer than the keel, bright yellow; keel semi-orbicular, crested behind the small often slightly circumflexed blunt beak, 6–8 mm. long.
Morphology Reproductive morphology Fruits
Pod cylindrical, with the 2·5–7 mm. long stipe ± 16–32 mm. long, glabrous, ± 12–32-seeded.
Morphology Reproductive morphology Seeds
Seeds obliquely oblong-cordiform, 2–3 mm. long, smooth, shiny bottle-green to brown.
Habitat
Grassland, deciduous woodland and open bushland, restricted to locally damp places in generally dry areas, also persisting on roadsides and cultivated ground; 500–2280 m.
Distribution
K3 K4 K5 K6 T1 T2 T3 T4 T5 T6 T7 T8 U1 U2 widespread in all but the very driest parts of tropical Africa
[FTEA]

International Legume Database and Information Service

Conservation
Not Threatened
Ecology
Africa: Lake Victoria regional transition zone; grasslands, Zambezian grassland, Guinea-Congolia/Sudania regional transition zone; grasslands., Guinea-Congolia/Zambezia regional transition zone; grassland., Sudanian grasslands, Somalia-Masai grasslands
Morphology General Habit
Annual, Not climbing, Herb
[ILDIS]

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

Morphology General Habit
Erect annual or short-lived perennial, laxly branched above, up to 0.5–1.2(1.8) m tall, with a rather slender glabrous or subglabrous stem.
Morphology Leaves
Leaves almost always estipulate, subsessile, simple; blade (1.2)2–8.5 × 0.2–1(1.5) cm, linear to oblong-lanceolate, oblong or rarely elliptic-obovate, glabrous or practically so, ± glaucous, sometimes drying blackish.
Morphology Reproductive morphology Inflorescences
Racemes laxly 3–12-flowered; bracts 1–9 mm long, linear to narrowly elliptic; bracteoles on the pedicel, filiform, small.
Morphology Reproductive morphology Flowers Calyx
Calyx 4–7 mm long, glabrous or sparsely puberulous; lobes narrow, longer than the tube.
Morphology Reproductive morphology Flowers Corolla
Standard subcircular, pale yellow, veined brownish, glabrous outside; wings exceeding the keel, bright yellow; keel 6–8 mm long, semicircular, crested behind the small beak.
Morphology Reproductive morphology Fruits
Pod with the (3)4–7 mm long stipe (1.8)2.4–3.6 cm long, cylindrical, glabrous, 24–32-seeded.
Morphology Reproductive morphology Seeds
Seeds 2–3 mm long, obliquely oblong-cordiform, smooth, shiny, bottle-green to brown.
[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]

Papilionaceae, Hutchinson and Dalziel. Flora of West Tropical Africa 1:2. 1958

Morphology General Habit
Erect glabrous herb, 1–3 tt. high, or taller in long grass
Morphology Reproductive morphology Flowers
Flowers yellow, distant on lax axillary and terminal racemes
Note
Plant drying black in var. welwitschii Bak. f.
[FWTA]

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

  • Flora of West Tropical Africa

    • Flora of West Tropical 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