San Juan Tumblemustard
Thelypodiopsis divaricata (Caulanthus divaricatus)

Family: Mustard (Brassicaceae)
AKA: Spreading Thelypodiopsis
Photo taken on: May 10, 2010
Location: Little Wildhorse Canyon, UT
Life Zones: Foothills
Habitat: Dry sandy areas, canyons

Growing to 3 feet high with twisting branches. Basal leaves are oblong to 4" long and soon wither. Stem leaves clasp the stem. It produces dense clusters of yellow flowers with four crinkled petals and a calyx ½" long. Seedpods are up to 4" long.

Flora of North America reference.