Clusters of indigo-blue, pea-like flowers in spikes followed by black pods. Seeds in black pods often rattle in the wind. Foliage is blue-green (or gray-green) and growth habit is shrub-like. A very long-lived perennial. Forms a bushy mound. Part of our Pollinator Buffet plant tag series. The brown-belted bumble bee is a common bee that is attracted to the pollen and nectar of a wide variety of plants.