Streptanthus

Streptanthus is a genus of plants within the family Brassicaceae. There are 56 known species within the genus Streptanthus, distributed through the western and south-central United States and northern Mexico. The common names for this genus are twistflower and jewelflower. Twenty-four of the species and eleven lesser taxa occur in California, thirty-two of which are California endemics; seventeen of these California taxa are classified as rare plants.

==Species and subspecies== 56 species are accepted. The following are some of the species (or subspecies) of the genus Streptanthus (county locations are not intended to be exhaustive): Streptanthus amplexicaulis Streptanthus anceps Streptanthus anomalus Streptanthus barbatus – Pacific jewelflower Streptanthus barbiger – Bearded jewelflower Streptanthus barnebyi Streptanthus batrachopus – Mt. Tamalpais jewelflower Streptanthus bernardinus – Laguna Mountain jewelflower Streptanthus brachiatus – Socrates Mine jewelflower Streptanthus bracteatus – Bracted twistflower Streptanthus breweri – Brewer's jewelflower Streptanthus californicus Streptanthus callistus – Mt. Hamilton jewelflower Streptanthus campestris – Southern jewelflower Streptanthus carinatus – Lyreleaf jewelflower Streptanthus cooperi Streptanthus cordatus – Heartleaf twistflower Streptanthus coulteri Streptanthus crassicaulis Streptanthus cutleri – Cutler's jewelflower Streptanthus diversifolius – Variableleaf jewelflower Streptanthus drepanoides – Sicklefruit jewelflower Streptanthus farnsworthianus – Farnsworth's jewelflower Streptanthus fenestratus – Tehipite Valley jewelflower (Fresno County, California) Streptanthus flavescens Streptanthus glandulosus  – Bristly jewelflower, common jewelflower (Mendocino County to San Luis Obispo County, California) Streptanthus glandulosus subsp. albidus – Metcalf Canyon jewelflower (Santa Clara County, California), endangered Streptanthus glandulosus subsp. arkii Streptanthus glandulosus subsp. glandulosus Streptanthus glandulosus var. hoffmanii Streptanthus glandulosus subsp. josephinensis Streptanthus glandulosus subsp. niger – Tiburon jewelflower (Marin County, California), endangered Streptanthus glandulosus subsp. pulchellus Streptanthus glandulosus subsp. raichei Streptanthus glandulosus subsp. secundus Streptanthus glandulosus subsp. sonomensis Streptanthus glaucus Streptanthus gracilis – Alpine jewelflower Streptanthus hallii Streptanthus hammittii , Hammitt's clay-cress (Riverside and San Diego counties, California) Streptanthus hesperidis Streptanthus heterophyllus Streptanthus hispidus – Mt. Diablo jewelflower (Contra Costa County, California) Streptanthus howellii – Howell's jewelflower Streptanthus hyacinthoides – Sandhill twistflower (Texas, Arkansas, Louisiana, Oklahoma, Nebraska) Streptanthus inflatus Streptanthus insignis – Plumed jewelflower Streptanthus juneae (San Bernardino Mountains, San Bernardino County, California) Streptanthus lasiophyllus Streptanthus lemmonii Streptanthus longisiliquus – Longfruit jewelflower Streptanthus maculatus – Clasping jewelflower, type species, (Arkansas, Oklahoma, Texas) Streptanthus major Streptanthus medeirosii (Tehachapi Mountains, Kern County, California) Streptanthus morrisonii – Morrison's jewelflower Streptanthus oblanceolatus Streptanthus oliganthus – Masonic Mountain jewelflower Streptanthus petiolaris Streptanthus pilosus Streptanthus platycarpus Streptanthus polygaloides – Milkwort jewelflower Streptanthus simulans Streptanthus squamiformis Streptanthus tortuosus – Mountain jewelflower, shieldplant Streptanthus vernalis – Early jewelflower Streptanthus vimineus