woolly distaff thistle USDA PLANTS Symbol: CALA20
U.S. Nativity: Exotic
Habit: Forbs/Herbs
Carthamus lanatus L.

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Taxonomic Rank: Magnoliopsida: Asterales: Asteraceae
Synonym(s): distaff thistle, saffron thistle

Appearance
Carthamus lanatus is a winter annual forb that can grow up to 3.3 ft. (1 m) tall.
Foliage
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
Flowers are disk shaped, yellow, 1-1.4 in. (25-35 mm) long. Receptacles are cone- shaped. Blooming occurs from July to August.
Fruit
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.

Selected Images from Invasive.orgView All Images at Invasive.org


Plant(s); in flower
Joseph M. DiTomaso, University of California - Davis, Bugwood.org
Additional Resolutions & Image Usage

Plant(s); in flower
Joseph M. DiTomaso, University of California - Davis, Bugwood.org
Additional Resolutions & Image Usage

Plant(s); immature
Joseph M. DiTomaso, University of California - Davis, Bugwood.org
Additional Resolutions & Image Usage

Seedling(s);
Joseph M. DiTomaso, University of California - Davis, Bugwood.org
Additional Resolutions & Image Usage

EDDMapS Distribution:
This map is incomplete and is based only on current site and county level reports made by experts and records obtained from USDA Plants Database. For more information, visit www.eddmaps.org
 


State(s) Where Reported invasive.
Based on state level agency and organization lists of invasive plants from WeedUS database.


Invasive Listing Sources:
California Invasive Plant Council