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Montana Field Guide

Montana Field Guides

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

Non-native Species

Global Rank: G5
State Rank: SNA

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 1

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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 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

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

Observations in Montana Natural Heritage Program Database
Number of Observations: 1

(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 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Creeping Yellowcress — Rorippa sylvestris.  Montana Field Guide.  .  Retrieved on , from