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Montana Field Guide

Montana Field Guides

Dense-flower Pepper-grass - Lepidium densiflorum

Native Species

Global Rank: G5
State Rank: S5

Agency Status
MNPS Threat Rank:
C-value: 3

External Links

General Description
Annual or biennial. Stems erect, 8–50 cm, usually branched above. Basal leaves petiolate, narrowly oblanceolate with sinuate to shallowly lobed margins, withering early. Stem leaves sessile. Vestiture of sparse, short, simple hairs. Flowers white; petals ca. 1 mm long or lacking; stamens 2. Fruit broadly obovate, glabrous to pubescent, 2.5–3.5 mm long, notched; style lacking; pedicels spreading, glabrous or puberulent, 1.5–3.5 mm long. (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

In Montana we have varieties densiflorum, pubicarpum (A. Nelson) Thell., and ramosum (A. Nelson) Thell.

Species Range
Montana Range


Range Comments
Widespread in temperate North America (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 265

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



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

Disturbed soil of fields, grasslands, steppe, open forest; plains, valleys, montane (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Guenther, G.E. 1989. Ecological relationships of bitterbrush communities on the Mount Haggin Wildlife Management Area. M.Sc. Thesis. Bozeman, MT: Montana State University. 73 p.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Peterson, J. G. 1969. The food habits and summer distribution of juvenile Sage Grouse in central Montana. M.Sc. Thesis. Bozeman, Montana: Montana State University. 39 p.
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Citation for data on this website:
Dense-flower Pepper-grass — Lepidium densiflorum.  Montana Field Guide.  .  Retrieved on , from