Tephrosia dregeana E.Mey.

Flora Zambesiaca Leguminosae subfamily Papillionoideae by R.K. Brummitt

Morphology Reproductive morphology Flowers Corolla

Petals 5–6 mm long, purple to blue or pink, very rarely described as yellow. Petals 5–6 mm long, purple to blue or pink, very rarely described as yellow.

Morphology Reproductive morphology Flowers Androecium Stamens

Stamen tube joined above. Stamen tube joined above.

Morphology Reproductive morphology Flowers Gynoecium Ovary

Ovary pubescent; style glabrous, with pencillate tip.

Morphology Reproductive morphology Fruits

Pods (15)20–25(30) × (3.5)4(4.5) mm, boat-shaped, closely appressed-pubescent, light creamy-brown to straw-coloured. Pods (15)20–25(30) × (3.5)4(4.5) mm, boat-shaped, closely appressed-pubescent, light creamy-brown to straw-coloured.

Morphology Reproductive morphology Seeds

Seeds (1)2–6, c.3.5 × 2.5 × 1 mm, subreniform-oblong, conspicuously flattened, light brown, the aril scarcely developed. Seeds (1)2–6, c.3.5 × 2.5 × 1 mm, subreniform-oblong, conspicuously flattened, light brown, the aril scarcely developed.

Distribution

Also in South Africa, Namibia and Angola.

Ecology

Combretum apiculatum, Terminalia prunioides, Sclerocarya savanna on shallow sand overlying limestone; elsewhere from sandy and gravelly ground, often in river beds, on dolomite, schist, granite, etc.

Morphology General Habit

Annual with a long slender taproot to perennial with a woody stock. Annual with a long slender taproot to perennial with a woody stock.

Morphology Stem

Stems 10–60 cm high, often becoming woody at the base, with sparse to sometimes moderately dense, appressed or rarely ascending hairs. Stems 10–60 cm high, often becoming woody at the base, with sparse to sometimes moderately dense, appressed or rarely ascending hairs.

Morphology Leaves

Leaves pinnate with (1)2–4(5) pairs of leaflets; petiole (1)1.3–3(4) cm long, petiole and rachis together (1.5)2.5–5.5(8.5) cm long, pubescent like the stem; leaflets (1.3)2–4.5(7) × 0.1–0.6(0.7) cm, linear to linear-elliptic or rarely narrowly elliptic, subcuneate at the base, acute to subobtuse at the apex; upper surface glabrous or appressed-pubescent, lower surface somewhat thinly appressed-pubescent; stipules 2–7 × 0.3–0.8 mm, linear. Leaves pinnate with (1)2–4(5) pairs of leaflets; petiole (1)1.3–3(4) cm long, petiole and rachis together (1.5)2.5–5.5(8.5) cm long, pubescent like the stem; leaflets (1.3)2–4.5(7) × 0.1–0.6(0.7) cm, linear to linear-elliptic or rarely narrowly elliptic, subcuneate at the base, acute to subobtuse at the apex; upper surface glabrous or appressed-pubescent, lower surface somewhat thinly appressed-pubescent; stipules 2–7 × 0.3–0.8 mm, linear.

Morphology Reproductive morphology Flowers

Flowers in terminal racemes up to 35 cm long; bracts 1–2 × 0.3 mm, subulate; pedicels 2–7(10) mm long, very slender. Flowers in terminal racemes up to 35 cm long; bracts 1–2 × 0.3 mm, subulate; pedicels 2–7(10) mm long, very slender.

Morphology Reproductive morphology Flowers Calyx

Calyx 1.5–2.5(3) mm long, appressed-pubescent with greyish hairs; lateral teeth much shorter than to about equalling the tube, upper teeth joined for about half their length. Calyx 1.5–2.5(3) mm long, appressed-pubescent with greyish hairs; lateral teeth much shorter than to about equalling the tube, upper teeth joined for about half their length.

Morphology Reproductive morphology Flowers Gynoecium Pistil

Ovary pubescent; style glabrous, with pencillate tip.

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