Flora of North America species comparison

20–70 cm.

erect to procumbent or decumbent, terete, pubescent.

30–70 × 10–20 mm;

stipules linear, 1–2 mm;

leaflets (9–)19–37, blades elliptical or ovate, leaflets of larger leaves 3.5–6 × 1.5–2.5 mm.

alternate, odd-pinnate;

stipules present, distinct, dark-tipped, membranous;

petiolate;

leaflets 15–37, blade margins entire, surfaces pubescent.

pedunculate, 2–8-flowered, axillary, umbellate heads;

bracts present or absent, pinnate or unifoliolate and leaflike;

bracteoles 1–8, 0.5 mm, dark-tipped, membranous.

1–3 cm in flower, 3–7 cm in fruit.

0–1 mm.

calyx 3.5–5 mm, lobes 1.5–2.5 mm, less than or equaling tube length;

corolla white or pink, 6–9 mm.

papilionaceous;

calyx ± actinomorphic, tubular or campanulate, lobes 5;

corolla white, pink, or yellow [purple], keel obtuse, inconspicuous;

stamens 10, diadelphous;

anthers basifixed;

styles glabrous;

stigmas terminal.

loments, stipitate, laterally compressed [terete], linear or curved, constricted between seeds or not, laterally dehiscent into indehiscent segments, segments oblong or elliptic oblong, reticulate-veined, pubescent.

2–5-flowered, 10 mm diam.;

bract shorter than flowers, 5–9-foliolate.

1.5–2 × 1 mm.

3–9, compressed-orbicular to ellipsoid-orbicular, smooth;

hilum lateral.

compressed, constricted between seeds, 12–25 × 2–2.7 mm;

segments 3–7, elliptic-oblong, 2.8–3.5 mm;

beaks straight, sometimes hooked at tip, 2–5 mm.

= 7.