Ten; see text Streptanthus glandulosus is a species of flowering plant in the mustard family known by the common name bristly jewelflower.

[2] It is native to California and southwestern Oregon, where it grows in many types of habitat, including grassland, chaparral, and woodlands.

Genetic and other analyses indicate that it is a species complex with ten subspecies which evolved as populations were isolated from each other.

[3] The complex includes subspecies previously considered separate species, such as the rare Tiburon jewelflower (ssp.

Each flower has an urn-shaped calyx of sepals one-half to over one centimeter long which can be almost any color from white to yellowish to pink or purple to nearly black.