Description
Key Characters:
Growth Form:
Annual herbs.
Stems:
Stems erect or ascending, 1–5 dm long, unbranched or with a few branches from base, appressed pubescent to villous.
Roots:
Leaves:
Leaves compound.
Alternate.
Leaflets broadly obovate–cuneate to suborbicular, 10–25 mm long, 10–15 mm wide.
Margins denticulate toward apex.
Lateral veins ending at margins.
Petiolate.
Stipules elliptic, adnate to petioles ca. 3/5 their length.
Flowers:
Flowers in heads, terminal, ovoid, 20–60 mm long, 0.1–15 mm in diameter, longer in fruit, peduncles 40–100 mm long.
Flowers papilionaceous; pedicels 0–1 mm long, bracts absent, bracteoles absent.
Calyx tube 2.7– 3.2 mm long, 10–nerved, densely villous, the throat closed by an annular callose thickening and a ring of hairs, the teeth subequal, linear, 5–7 mm long, spreading in fruit.
Corolla blood–red, white, or pink, 10–12 mm long.
Stamens 10; upper stamen distinct, the other 9 connate into a tube.
Ovary superior.
Fruit:
Pods ovoid; enclosed in calyx.
Seeds 1 per fruit; greenish yellow to reddish brown; ovoid; 2–2.5 mm long.
Ploidy:
2n = 14; 16
Habitat:
Elevation Range: