Senna covesii (Desert Senna, Coues' Senna, Rattleweed, "rattlebox", "dais" or "Cove Senna") is a perennial subshrub in the family Fabaceae, native to the Mojave Desert in southeastern California, southern Nevada, and Arizona in the United States, and northern Baja California in Mexico. It is found on desert plains and in sandy washes between 500-600 meter altitude, and very common in Joshua Tree National Park, and is also found in the Sonoran Desert. The specific name honors ornithologist Elliott Coues. It grows to 30-60 centimeter tall, and is leafless most of the year. The leaves are pinnate, 3-7 centimeter long, with 2-3 pairs of leaflets (no terminal leaflet), the leaflets elliptical, 1-2.5 centimeter long. The flowers are yellow in color, with five rounded petals about 12 millimeter long.