Vascular Plants - Amaranthaceae - Salsola:
Salsola tragus
Page Author: David Giblin
prickly Russian thistle 
Blooms: June - August
Habit: herb
Duration: annual
Origin: Introduced from Eurasia
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.
Species Description:

General: Glabrous to pubescent annual, with numerous spreading-ascending, often purplish stems up to 1 m. long, becoming hardened and rounded, forming tumble-weeds.
Leaves: 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: 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.
Fruits: Fruit cup-shaped, 2.5 mm. broad, completely enclosed by the persistent calyx.
Accepted Name:
Salsola tragus L.
Synonyms:
Salsola australis R. Br.
Salsola iberica (Sennen & Pau) Botsch. ex Czerepanov
Salsola kali L.
Salsola kali L. var. tenuifolia Tausch ex Moq.
Salsola pestifer A. Nelson

Treated in Flora of the PNW as:
Salsola kali
Additional Resources:

PNW Herbaria Specimens: View list of all Salsola tragus specimens in the Consortium of Pacific Northwest Herbaria database.

WTU Herbarium Specimens: View list of Salsola tragus specimens in the WTU Herbarium database.

Washington Flora Checklist: Salsola tragus treatment.

E-Flora BC: Salsola tragus atlas page.

CalPhotos: Salsola tragus images.

USDA Plants Database: Salsola tragus.
Additional photographs of Salsola tragus:
(click on a thumbnail to view larger photo)

J. William Thompson

J. William Thompson

Richard Old

Richard Old

Richard Old

G. D. Carr, 2007

G. D. Carr, 2007

G. D. Carr, 2007

G. D. Carr, 2007

Brian Luther, 2014

Craig Althen, 2015

Craig Althen, 2015

Robert L. Carr, 2013

Robert L. Carr , 2014

Robert L. Carr , 2014

Robert L. Carr , 2014

Brian Luther, 2015

Brian Luther, 2015

Brian Luther, 2015

Brian Luther, 2016

Ron Bockelman, 2015

Ron Bockelman, 2015

Ron Bockelman, 2015

Ron Bockelman, 2015

Ron Bockelman, 2015
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