About Crotalaria purshii DC.
Crotalaria purshii DC. is a densely pubescent perennial herb that reaches 0.2 to 0.5 meters in height. Its leaves are simple; middle and upper leaves are linear to lanceolate, measuring 4 to 10 mm wide and 3 to 6 cm long, while lower leaves are oblong to spatulate, measuring 6 to 15 mm wide and 2 to 3 cm long. Its peduncles are 3 to 12 cm long and bear 3 to 6 yellow flowers. The yellow petals are equal in length to or longer than the calyx, which is closely subtended by two linear, flat bractlets that are 4 to 6 mm long. This species is endemic to the coastal plain of the southeastern United States, with a range extending from southeastern Virginia to central Florida, and west to Louisiana. It grows in roadsides, sandy openings, and dry to mesic pinelands, occurring across a range of light conditions and in a variety of mostly sandy soil types. The genus Crotalaria is classified as a noxious weed by the Arkansas State Plant Board. Crotalaria purshii itself is listed as endangered and possibly extirpated by the Tennessee Department of Environment and Conservation. The seeds of this species can be used as a coffee substitute, though this use is not recommended because improper preparation can cause poisoning.
