Horsebrush, a leafy, rigid shrub, can be found on the higher, dry slopes in the mountains of Southern California deserts.
Horsebrush (Tertradymia canescens) resembles many other species that flourish in the same type of habitat and belong to the same composite family. It reaches heights of a foot or more and has an unusual fragance.
The plant's narrow, linear leaves, which are covered with white wool, average about an inch long. The leaves, which curl when dry, alternate on the plant's woolly stems.
In the fall, horsebrush, which grows in clumps, is topped by hundreds of tiny yellow flowers growing in loose clusters. Each plant head has four flowers--each with yellow petals and yellowish, hairy bristles. The flowers are of the disk variety.