Robert W. Freckmann Herbarium

  Descurainia pinnata (Walter) Britton subsp. brachycarpa (Richardson) Detling image
Photographer: Gary Fewless           

Botanical Illustration

PNW Weed Management Handbook
Family Brassicaceae
Descurainia pinnata (Walter) Britton subsp. brachycarpa (Richardson) Detling
green tansy mustard, pinnate tansy mustard, western tansy mustard
Descurainia: in honor of Francois Descourain (1658-1740), a French pharmacist and botanist
pinnata: Latin for "featherlike;" feathered or feathery, pinnate, in reference to the leaves
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Native
Plant: erect, annual/biennial, 8"-28" tall forb
Flower: yellow, 4-parted, 1/8" wide; inflorescence up to 12" long in a loose cluster of stalked flowers; blooms May-July
Fruit:club-shaped pod, not drooping; fruit drawing seeds in 2 rows
Leaf:stem leaves 1-3 times pinnately-divided into fine, feathery leaflets
Habitat: full to partial sun; dry; disturbed areas

More Information Natural Communities Herbarium Specimens
All Descurainia list Google- Images or Text

Flora of North America (off site)
Descurainia brachycarpa (Richardson) O.E.Schulz
Descurainia pinnata (Walter) Britton var. brachycarpa (Richardson) Fernald
Sisymbrium brachycarpum Richardson
Sisymbrium canescens Nutt. var. brachycarpa (Richardson) S.Watson
Sophia brachycarpa (Richardson) Rydb.

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