Senna humifusa (Brenan) Lock

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

M. Thulin et al. Flora of Somalia, Vol. 1-4 [updated 2008] https://plants.jstor.org/collection/FLOS

Morphology General Habit

Herb or slightly woody plant, with prostrate densely pubescent stems up to at least 80 cm long

Morphology Leaves

Leaves 5–14.5 cm long, eglandular except sometimes for tiny bodies clustered at leaflet-insertions; stipules narrowly triangular, 6–13 mm long; leaflets 6–12 pairs, lanceolate or elliptic-lanceolate, 1.1–2.6(–3.5) x 0.3–1(–1.6) cm, acute or subacuminate at apex, pubescent with short spreading hairs

Morphology Reproductive morphology Inflorescences

Racemes 11–32 cm long; bracts ovate-acuminate, caducous

Morphology Reproductive morphology Flowers Corolla

Petals yellow, 1.5–2 cm long

Morphology Reproductive morphology Flowers Androecium Stamens

Stamens 10: 2 anthers large, 5 medium-sized, 3 small

Morphology Reproductive morphology Fruits

Pods oblong, flattened, c. 5–6 x 1–1.7 cm, not crested, but rounded over each seed, densely pubescent

Morphology Reproductive morphology Seeds

Seeds transversely arranged, compressed, ripe ones not seen.

Distribution

S1, 3; NE Kenya

Ecology

Altitude range 90–360 m.

Vernacular

Salmuko (Somali).

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

Morphology General Habit

Herb, or sometimes slightly woody, with prostrate densely pubescent eglandular stems up to 80 cm. or more long.

Morphology Leaves

Leaves 5–14.5 cm. long; petiole (0.3–1.4 cm. long) and rhachis eglandular or only with tiny clustered bodies at leaflet insertions. Stipules narrowly lanceolate-triangular, or the larger ones oblong-triangular, 1–nerved, 6–13 mm. long, 1.5–3 mm. wide near base. Leaflets in 6–12 pairs, lanceolate or elliptic-lanceolate, 1.1–2.6(–3.5) cm. long, 0.3–1 (–1.6) cm. wide, acute or subacuminate and often shortly mucronate at apex, shortly pubescent on both sides.

Morphology Reproductive morphology Inflorescences

Racemes (including peduncle) 11–32 cm. long; flowering axis densely pubescent.

Morphology Reproductive morphology Inflorescences Bracts

Bracts subtending flower-buds ovate-acuminate, 3.5–5 mm. long, 2.5–3 mm. wide.

Morphology Reproductive morphology Flowers Corolla

Petals yellow, 1.6–2 cm. long, 0.9–1.1 cm. wide.

Morphology Reproductive morphology Flowers Androecium Stamens

Stamens 10; filaments straight or nearly so; 2 anthers large, 5 medium, 3 small.

Morphology Reproductive morphology Fruits

Ripe pods not seen, probably similar to those of C. longiracemosa.

Habitat

Dry scrub with trees; 210–610 m.

Distribution

apparently endemic and so far found only at or near Wajir K1