Descurainia incisa ssp. incisa

(Mountain Tansy-mustard)

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Descurainia incisa, White River Plateau, Newcastle-Buford Rd., Garfield Co. 6095

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Descurainia incisa, White River Plateau, Newcastle-Buford Rd., Garfield Co. 6085

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Descurainia incisa, White River Plateau, Newcastle-Buford Rd., Garfield Co. 6086

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Descurainia incisa, White River Plateau, Newcastle-Buford Rd., Garfield Co. 6096

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Descurainia incisa, White River Plateau, Newcastle-Buford Rd., Garfield Co. 6084

Scientific Name Descurainia incisa ssp. incisa USDA PLANTS Symbol DEINI2
Common Name Mountain Tansy-mustard ITIS Taxonomic Serial No. 823353
Family Brassicaceae (Mustard) SEINet
Reference
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Description Life zones and habitat: Foothills to montane (5500 to 10000 ft.); meadows, roadsides, streamsides, wooded areas.
Plant: Erect perennial 6 to 33 inches tall; erect stems usually unbranched below and branched above, may be glandular or not and densely to sparsely pubescent.
Leaves: Pinnate basal leaves, obovate to oblanceolate in outline, 5/8 to 4 inches long with 2 to 9 pairs of lateral lobes with dentate to incised or entire margins; smaller stem leaves are sessile or short-petiolate, with oblong, lanceolate or linear lobes with dentate to denticulate or entire margins.
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: June to August.
Fruit: Less than 3/4-inch long, erect and appressed (hugging the stem), straight or somewhat curved inward, slightly torulose and attached by stalks about the same length.
References: "Flora of Colorado" by Jennifer Ackerfield, Flora of North America 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