- Crupina vulgaris is a Federal Noxious Weed and is native to southern Europe. It is a winter annual that grows 1-4 ft. (0.3-1.2 m) tall.
- Leaves are entire to finely dissected (leaves become more divided towards the apex) and up to 6 in. (15.2 cm) long. Crupina vulgaris begins as a basal rosette and eventually develops alternating dissected leaves that are rough to the touch.
- Flowers are purple to pink, long, slender (vase-shaped) and bloom from May until soil moisture is depleted.
- It reproduces by seed.
- Ecological Threat
- Dense populations of this plant can invade grasslands, pastures, rangelands, forested areas, canyons, riparian areas, roadsides and waste places in the western United States. Grazing (deer or livestock) or cutting can stimulate lateral branching, thereby increasing flower and seed production.
DiTomaso, J.M., G.B. Kyser et al. 2013. Weed Control in Natural Areas in the Western United States. Weed Research and Information Center, University of California. 544 pp. 
Oregon Department of Agriculture Plant Programs, Noxious Weed Control 
Washington State Noxious Weed Control Board 
University of California, Jepson Flora Project 
Colorado Weed Management Association 
Flora of North America, www.eFloras.org 
Nevada Department of Agriculture 
California Invasive Plant Council 
USDA NRCS PLANTS 
USDA ARS GRIN 
Images from Bugwood.org