Scientific Name: Chorizanthe robusta var. hartwegii
Status: E, CH
A short-lived annual species in the buckwheat family, the Scotts Valley Spineflower is a low-growing herb with rose-pink margins confined to the basal portion of the teeth and an erect form of growth. Theflowers heads are medium-sized (0.4 to 0.6 inches in diameter) and distinctly aggregate. Each flower produces just one seed; the seeds are 3.5 to 4.0 millimeters (mm) long. Hooks on the spines which surround the seed facilitate seed dispersal. The Scotts Valley Spineflower is one of two varieties of the species Chorizanthe robusta. The other variety, known as robust spineflower, is restricted to sandy soils in coastal and near-coastal areas in Santa Cruz County.
Habitat: Sedimentary deposits of sandstone and mudstone.
Threats: Sand mining and residential development are the main threats to this species, along with its limited habitat and small population.