Desert senna

Senna covesii

Formerly Cassia covesii. Native leguminous perennial forb to subsrub with yellow flowers, blooming sporadically throughout the year in response to desert rain. Drought tolerant, occurring on dry sandy plains and washes in the Mohave and Sonoran Deserts and beyond; up to 4,500 ft. elevation. Easy established along roadsides and in xeriscapes. Visited by carpenter bees and bumble bees; larval host for Cloudless sulpher butterflies.