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Montana Field Guide

Montana Field Guides

Creeping Yellowcress - Rorippa sylvestris
Other Names:  Yellow Fieldcress, Keek

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Non-native Species

Global Rank: G5
State Rank: SNA
C-value: 1


Agency Status
USFWS:
USFS:
BLM:


 

External Links

 
General Description
Stems ascending, branched, 15–50 cm. Leaves all cauline, petiolate, 2–15 cm long; the blade oblong, deeply pinnately lobed and dentate, the apical lobe similar to the lateral. Vestiture of sparse hairs on the lower stem otherwise glabrous. Petals yellow, 3–5 mm long. Fruit a linear silicle, 9–16 × up to 1 mm, glabrous; style 0.8–1.5 mm long; pedicels spreading, 7–11 mm long (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Montana Range Range Descriptions

Non-native
 


Range Comments
Introduced to BC to ND south to CA, MO; native to Eurasia (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 15

(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
Moist soil of fields, roadsides, gravelly riverbanks; plains, valleys (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Ecology
POLLINATORS
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).

Management


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.
    • 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. 2022. Manual of Montana Vascular Plants, Second Edition. Fort Worth, TX: BRIT Press. viii + 779 p.
  • Web Search Engines for Articles on "Creeping Yellowcress"
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Citation for data on this website:
Creeping Yellowcress — Rorippa sylvestris.  Montana Field Guide.  .  Retrieved on , from