with purple-brown bristly hairs. Each flower is about 1" long and nearly as wide; it has a short tubular calyx and 5 petals. The petals are arranged like a typical pea-flower: there is large upright banner, a pair of lateral wings, and a partially hidden keel (the latter consisting of two petals). There is a patch of pale yellow at the base of the banner. The blooming period occurs from late spring to mid-summer and lasts about a month. Fertile flowers are replaced by elongated seedpods about 2-3" long. The seedpods are somewhat flattened and covered with purple-brown bristly hairs. Each seedpod eventually splits open into two parts to release its seeds. The root system is rhizomatous, often forming vegetative offsets.