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Montana Field Guide

Montana Field Guides

Wild Yellowcress - Rorippa truncata
Other Names:  Rorippa curvipes var. truncata

Native Species

Global Rank: G5
State Rank: SNR
C-value: 4

Agency Status


External Links

General Description
Taprooted annual to short-lived perennial. Stems prostrate to ascending, 5–20 cm long, branched with racemes terminal and from upper leaf axils. Leaves all cauline, oblanceolate, 2–6 cm long, crenate-dentate to pinnately lobed, the terminal lobe largest. Vestiture of sparse simple hairs or glabrous. Petals yellow, 0.5–1 mm long, shorter than the sepals. Fruits linear-oblong siliques, 4–9 × 1.5–2.4 mm, glabrous; styles 0.2–0.5 mm long; pedicels spreading, 1–5 mm long (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
Found from California to Washington, east to Saskatchewan, North Dakota, and Missouri and south to Texas and northern Mexico (Rollins 1993).

Observations in Montana Natural Heritage Program Database
Number of Observations: 2

(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 around ponds, rivers, lakes; plains, valleys to subalpine (Lesica et al. 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
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • 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.
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Citation for data on this website:
Wild Yellowcress — Rorippa truncata.  Montana Field Guide.  .  Retrieved on , from