General: Perennial herb from a slender rhizome, with stolons; stems erect or ascending, to 60 cm tall, hollow, glabrous or hairy.
Leaves: Alternate, pinnately compound; leaflets 5, the upper egg-shaped, 15-20 mm long, the basal pair stipule-like, egg-shaped; stipules represented by small dark glands.
Flowers: Inflorescence a compact, stalked, axillary umbel of 7 to 12 pea-like flowers, the umbel-stalks to 15 cm long, with 3-parted bracts below the umbel; corollas yellow, 12-15 mm long; calyces about 7 mm long, the lance-triangular teeth slightly longer than the tube, usually fringed with long hairs.
Fruits: Pods, linear-oblong, about 2.5 cm long, glabrous, not constricted between the seeds.
If more than one illustration is
available for a species (e.g., separate illustrations were provided for two
subspecies) then links to the separate images will be provided below.
Note that individual subspecies or varietal illustrations are not always available.
