Distribution: Introduced from Eurasia world-wide in arid regions; chiefly east of the Caascades, southern British Columbia to California.
Habitat: Dry, open ground and wasteland.
Flowers: June - August
Origin: Introduced from Eurasia
Conservation Status: Not of concern
Glabrous to pubescent annual, with numerous spreading-ascending, often purplish stems up to 1 m. long, becoming hardened and rounded, forming tumble-weeds.
Leaves alternate, linear, succulent, 1-3 cm. long, with a spiny tip, reduced upward but broadening at the base, becoming spiny bracts with scarious margins basally.
Flowers small, perfect, solitary or clustered in the axils of the bracts, each with a pair of bracteoles 2.5-3.5 mm. long; perianth 5-cleft nearly to the base, in fruit becoming winged, the wing veined; stamens 5, attached at the edge of a tiny, lobed disk; styles 2.
Fruit cup-shaped, 2.5 mm. broad, completely enclosed by the persistent calyx.