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Montana Field Guide

Montana Field Guides

Modoc County Yellowcress - Rorippa tenerrima

Native Species

Global Rank: G5
State Rank: SNR

Agency Status
MNPS Threat Rank:
C-value: 4

External Links

General Description
Glabrous annual from a thickened taproot. Stems prostrate to ascending, 3–20 cm long, branched. Leaves basal and cauline; the basal withering early; stem leaves oblanceolate, 1–8 cm long, pinnately lobed with sinuate margins, the terminal lobe largest. Petals yellow, 0.5–0.8 mm long, shorter than the sepals. Fruit a lanceolate silique, 3–7 × 1–1.5 mm, papillose (use 20X); style 0.2–0.6 mm long; pedicels ascending, 1–3 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range

Range Comments
BC to SK, south to CA, NM, TX, MO and Mexico (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 3

(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)

Mud along shores of lakes, ponds, streams; plains, valleys, montane (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap: Bombus rufocinctus (Thorp et al. 1983).

  • Literature Cited AboveLegend:   View Online Publication
    • Thorp, R.W., D.S. Horning, and L.L. Dunning. 1983. Bumble bees and cuckoo bumble bees of California (Hymenoptera: Apidae). Bulletin of the California Insect Survey 23:1-79.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
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Citation for data on this website:
Modoc County Yellowcress — Rorippa tenerrima.  Montana Field Guide.  .  Retrieved on , from