Common: Triangle Bur Weed, Triangle Bursage, Triangleleaf Bursage
The Rabbit Bush shrub grows in desert habitats and is one of the most abundant plants in the Arizona Sonoran Desert, growing on steep, rocky slopes. The Rabbit Bush also invades grasslands that have been overgrazed. It grows from a taproot with many lateral and random roots, often with dead branches tangled in the living plant. The leaves are about 0.8 inch and become hairless as they age. Branches and new leaves are thinly coated with hair. The Rabbit Bush can live as long as 50 years. Airborne allergens can cause contact dermatitis in humans.