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Montana Field Guide

Montana Field Guides

Mountain Tansymustard - Descurainia incana
Other Names:  Descurainia richardsonii

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Native Species

Global Rank: G5
State Rank: SNR
C-value: 3


Agency Status
USFWS:
USFS:
BLM:


 

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General Description
Biennial. Stems 10–80 cm. Stem leaves 3–8 cm long, ovate to oblanceolate, pinnate, the pinnae lobed to entire. Vestiture of minute branched hairs to glabrous or glandular. Petals yellow, 1–2 mm long. Fruit curved to straight, erect to ascending, 4–15 mm × up to 1 mm, tapering at both ends; style 0.2–0.4 mm long; seeds 4 to 8 per locule in 1 row; pedicels erect to spreading (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Infraspecific taxa recognized currently for Montana are subspecies incana or viscosa, and variety macrosperma.

Few Floras agree entirely on how to treat these taxa. Lesica (2012) reconized four taxa at the varietal level: viscosa, macrosperma, major, and incana.

Species Range
Montana Range Range Descriptions

Native
 


Range Comments
AK to QC south to CA, UT, CO, SD and MN (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 66

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat
Grasslands, steppe, open forest, often where disturbed; plains, valleys, montane (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
  • Literature Cited AboveLegend:   View Online Publication
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Ament, R.J. 1995. Pioneer Plant Communities Five Years After the 1988 Yellowstone Fires. M.Sc. Thesis. Bozeman, MT: Montana State University. 216 p.
    • Clark, D. 1991. The effect of fire on Yellowstone ecosystem seed banks. M.Sc. Thesis. Montana State University, Bozeman. 115 pp.
    • Seipel, T.F. 2006. Plant species diversity in the sagebrush steppe of Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 87 p.
    • Williams, K.L. 2012. Classification of the grasslands, shrublands, woodlands, forests and alpine vegetation associations of the Custer National Forest portion of the Beartooth Mountains in southcentral Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 376 p.
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Citation for data on this website:
Mountain Tansymustard — Descurainia incana.  Montana Field Guide.  .  Retrieved on , from