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

Amphiscirpus nevadensis (S. Watson) Oteng Yeboah
Nevada bulrush (Nevada clubrush)
Cyperaceae (Sedge family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #14540)

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Distribution of Amphiscirpus nevadensis
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Species Information

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General:
Perennial herb from rhizomes; stems scattered or in small tufts, circular in cross-section, tapered, tough and wiry, emergent for most of their length when growing in water, 10-40 cm tall.
Leaves:
Several, clustered near the base; sheaths persistent; blades firm, deeply grooved to thick and flat, mostly 1-2 mm wide, up to 20 cm long, often much shorter, the lowest ones sometimes reduced to scales.
Flowers:
Spikes (1) 2 to 10, terminal, 1-2 cm long, in compact, unstalked clusters; involucral bracts several, one or more of them short, reddish-tinged, resembling enlarged scales, the principal, longest ones slender, stiff, green, leaflike, 1.5-7 cm long, more or less spreading, sometimes resembling extensions of the stems, but more often diverging at an angle.
Fruits:
Scales numerous, shining brown, largely translucent except for the paler, firm midribs, which may be exserted beyond the scales into short, sharp, slender points, not notched at the tips; perianth bristles 1 to 3 (4), slender and much reduced, finely-barbed backwards, rarely surpassing the middle of the achenes, generally unequal; styles abruptly deciduous; achenes plano-convex, pale, firm-walled, about 2 mm long, the tips not sharp-pointed.
Notes:
The Eastham (1947) collection from the Fraser River delta was probably an introduction on sand dredgings.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Wet, usually alkaline, meadows in the steppe and montane zones; infrequent in SC BC; E to MB and S to NE, CO, UT, NV and CA; S America.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Amphiscirpus nevadensis

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) 516 1178 2360
Slope Gradient (%) 0 2 12
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
0 319 346
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
3 5 8
Modal Nutrient Regime
Class
E
Number of field plots
 species was recorded in:
16
Modal BEC Zone Class
IDF
All BEC Zones (# of stations/zone) species was recorded in: ESSF(4), IDF(11), IMA(1)

Climate

The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Scirpus nevadensis S. Watson

Taxonomic and Nomenclatural Links

Additional Photo Sources

Related Databases

General References