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Montana Field Guide

Montana Field Guides

Onerow Watercress - Rorippa microphylla
Other Names:  Nasturtium microphyllum

Non-native Species

Global Rank: GNR
State Rank: SNA

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

External Links






 
General Description
Perennial from fibrous-rooted rhizomes. Stems prostrate or floating, hollow, 10–50 cm long. Leaves all cauline, petiolate, 2–6 cm long; the blades pinnately compound with lanceolate to elliptic lateral lobes and an elliptic terminal segment. Petals white, 4–5 mm long. Fruit a linear silique, 8–12 mm long, ca. 0.5 mm wide; style ca. 1 mm long; pedicels spreading to ascending, 8–12 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
Introduced in much of north-temperate North America, native to Europe (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 4

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Relative Density

Recency

 

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



Habitat

References
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Citation for data on this website:
Onerow Watercress — Rorippa microphylla.  Montana Field Guide.  .  Retrieved on , from