E-Flora BC: Electronic Atlas of the Flora of British Columbia

Nasturtium officinale W.T. Aiton
common watercress
Brassicaceae (Mustard family)

Introduction to Vascular Plants

© Bryan Kelly-McArthur  Email the photographer   (Photo ID #70356)

E-Flora BC Static Map
Distribution of Nasturtium officinale
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Species Information

General:
Aquatic or semi-aquatic perennial herb from a fibrous root; stems leafy, succulent, submersed or partly floating, sometimes prostrate on mud, 10-60 cm long, only the tip usually erect, rooting at the nodes, glabrous or sparsely hairy.
Leaves:
Basal leaves pinnate with 3-7 leaflets, egg-shaped to broadly oblong, unstalked, without ear-like lobes at the bases, entire or wavy-margined, terminal leaflets larger than lateral, stalked, base of the stalks usually with small ear-like lobes at the bases, glabrous; stem leaves similar.
Flowers:
Racemes corymbose, elongate in fruit; flower stalks 6-20 mm long, spreading or even slightly recurved to ascending; petals white to purplish-tinged, 3-4 mm long, broadly spoon-shaped; sepals 2.5-3.5 mm long, glabrous, the outer pair pouched at base.
Fruits:
Siliques, widely spreading to somewhat ascending, slightly curved upward to straight, narrowly oblong, 10-25 mm long, 2-3 mm wide; beaks obscure, rarely to 0.5 mm long; seeds distinctly 2-rowed, flattened and very slightly wing-margined, coarsely wrinkled, about 1 mm long, about 24-60 pits per side.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Streams and shallow ponds in the lowland and montane zones; frequent in S BC, rare northward; introduced from Europe.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Nasturtium officinale

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class

Minimum

Average

Maximum

Elevation (metres) 780 780 780
Slope Gradient (%) 25 25 25
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
175 175 175
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
5 5 5
Modal Nutrient Regime
Class
D
Number of field plots
 species was recorded in:
1
Modal BEC Zone Class
BG
All BEC Zones (# of stations/zone) species was recorded in: BG(1)

Synonyms and Alternate Names

Rorippa nasturtium-aquaticum (Linnaeus) Hayek

Taxonomic and Nomenclatural Links

Additional Photo Sources

Related Databases

General References