woolly distaff thistle, distaff thistle, saffron thistle
- 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