- Carthamus lanatus is a winter annual forb that can grow up to 3.3 ft. (1 m) tall.
- Stem leaves are alternate, pinnate, stiff, and covered in small hairs. Base of the leaves lack petioles and weakly clasp stems. Basal leaves are like the stem leaves but larger.
- Flowers are disk shaped, yellow, 1-1.4 in. (25-35 mm) long. Receptacles are cone- shaped. Blooming occurs from July to August.
- Fruit is brown, oblong, 0.16-0.24 in. (4-6 mm) long, and notched near the base. Seeds are brownish in color, narrow, and 0.4-0.5 in. (10-13 mm) long.
- Ecological Threat
- Carthamus lanatus prefers disturbed areas such as roadsides, fields, and pastures. It is native to the Mediterranean and Europe.
Oregon Department of Agriculture Plant Programs, Noxious Weed Control 
University of California, Jepson Flora Project 
California Invasive Plant Council 
USDA NRCS PLANTS 
USDA ARS GRIN 
Images from Bugwood.org