Descurainia incana

(Mountain Tansy-mustard)

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Descurainia incana, Hoosier Ridge, Summit Co. 4816

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Descurainia incana, Hoosier Ridge, Summit Co. 4801

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Descurainia incana, Hoosier Ridge, Summit Co. 9461

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Descurainia incana, Hoosier Ridge, Summit Co. 9436

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Descurainia incana, Mayflower Gulch, Summit Co. 4778

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Descurainia incana, Mayflower Gulch, Summit Co. 4765

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Descurainia incana, Hoosier Ridge, Summit Co. 4809

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Descurainia incana, Hoosier Ridge, Summit Co. 9428

Scientific Name Descurainia incana USDA PLANTS Symbol DEIN5
Common Name Mountain Tansy-mustard ITIS Taxonomic Serial No. 502003
Family Brassicaceae (Mustard) SEINet
Reference
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Description Life zones and habitat: Foothills to subalpine (5300 to 11500 ft.); gravelly areas, grassy slopes, steep rocky slopes, roadsides, disturbed sites, meadows, prairies.
Plant: Erect biennial 10 to 48 inches tall; thin, leafy stem, smooth or slightly hairy, not glandular, with branches above.
Leaves: Deeply-lobed (pinnatifid) leaves, stem leaves alternate; lobes linear to oblong or narrowly lanceolate.
Inflorescence: Custers of flowers in racemes at leaf nodes and top of stem; compact but becoming elongated at fruiting; small flowers with four yellow sepals and four yellow petals, all less than 1/10 inch long.
Bloom Period: May to August.
Fruit: About 3/8-inch long or less, erect and appressed (hugging the stem), slightly torulose and attached by stalks about the same length.
References: "Flora of Colorado" by Jennifer Ackerfield, SEINet and American Southwest.
BONAP Distribution Map


Map Color Key
Colorado Status:
Native

© Tom Lebsack 2022

Banner photo: Ten Mile Range and Rhodiola integrifolia (King’s Crown) in Summit County