Crotalaria johnstonii Baker

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: threatened. Confidence: low confidence

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

Morphology General Habit

Erect branching annual 15–40 cm tall; branches slender, ascending, often mostly from near the base of the plant, densely pubescent with appressed to slightly spreading hairs at first, somewhat glabrescent.

Morphology Leaves

Leaves mostly 3-foliolate, uppermost occasionally 1-foliolate; leaflets 8–20 × 2–7 mm, oblanceolate to elliptic-oblanceolate, pubescent on both surfaces; petiole 4–10 mm long; stipules 0.

Morphology Reproductive morphology Inflorescences

Racemes 4–13 cm long, subdense at top, lax below, 10–30-flowered, developing other flowers in the axils below; bracts 2–3 mm long, linear, subequalling mature pedicels; bracteoles 0.

Morphology Reproductive morphology Flowers Calyx

Calyx 4–5 mm long, densely pubescent; upper lobes narrowly triangular, 2–3 times as long as the tube.

Morphology Reproductive morphology Flowers Corolla

Standard obovate, yellow marked brown, ± densely or at least extensively pubescent outside; wings nearly as long as the keel; keel (5)5.5–6.5 mm long, angular, with a narrow twisted beak incurved at the tip.

Morphology Reproductive morphology Fruits

Pod subsessile, globose, 3.5–4 mm across, 1–2-seeded.

Morphology Reproductive morphology Seeds

Seeds 2.5 mm long, oblique-cordiform, smooth, arillate.