Descurainia
tansymustard
6 species
2 subspecies and varieties
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Descurainia incanamountain tansymustard
Origin: Native
Descurainia incisa
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to Oregon and Nevada, east to the Rocky Mountains from Montana to Arizona, but not New Mexico.
Habitat: Moderately dry forest openings and sagebrush steppe.
Origin: Native
Flowers: April-June
ssp. incisa – cut-leaved tansymustard
Descurainia longepedicellatamountain tansymustard, narrow tansymustard, sticky tansymustard
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to Oregon and Nevada, east to the Rocky Mountains from Montana to Arizona, but not New Mexico.
Habitat: Moderately dry forest openings and sagebrush steppe.
Origin: Native
Flowers: April-June
Descurainia nelsoniiNelson's tansymustard, sagebrush tansymustard
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to Montana, Wyoming, Idaho, and Nevada.
Habitat: Sagrebrush-steppe to open montane forests.
Origin: Native
Flowers: May-June
Descurainia pinnatawestern tansymustard
Distribution: Occurring on both sides of the Cascades crest in Washington, but chiefly to the east; widely distributed throughout most of North America.
Habitat: Weedy native of fairly dry, open ground.
Origin: Native
Flowers: April-July
ssp. brachycarpa – shortpod tansymustard, western tansymustard
Descurainia sophiaflixweed
Distribution: East of the Cascades in Washington; introduced in most of the United States and Canada
Habitat: Weed of dry waste ground and other disturbed areas.
Origin: Introduced from Eurasia
Flowers: March-July