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

Poa marcida Hitchc.
weeping bluegrass (withered bluegrass)
Poaceae (Grass family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #29773)

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Distribution of Poa marcida
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Species Information

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Perennial, loosely to densely tufted grass from fibrous roots, sometimes with short rhizomes; stems 20-80 cm tall.
Sheaths smooth, the margins open about 1/10 their length; sterile shoots emerging mainly inside sheaths with tubular two-keeled buds protecting the scales; blades 1.5-5 mm wide, flat; ligules 0.5-2 mm long, the tips blunt, the backs smooth.
Inflorescence a lax panicle, 6-22 cm long, narrowly lanceolate, sparse, the branches 1 to 3 per node, ascending, lax, rough on angles; spikelets laterally compressed, 3.5-7 mm long, (1-) 2- (4-) flowered; lower glumes 1-nerved; rachilla internodes about 1 mm long, smooth, hairless; lemmas narrowly lanceolate, 3.2-5 mm long, the tips long-pointed, surface smooth, hairless, the lateral nerves moderately prominent; calluses sparsely cobwebby; palea keels smooth to rough; flowers bisexual; anthers 0.5-1.2 mm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Wet to moist meadows and bogs in the lowland zone; infrequent on Vancouver Island; rare in the lower Fraser valley (Vancouver); S to NW OR.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Poa marcida

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




Elevation (metres) 5 224 1200
Slope Gradient (%) 0 8 75
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
0 243 350
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
1 5 7
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: CWH(54), ESSF(1), SBS(1)


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 cool mesothermal.

Synonyms and Alternate Names

Poa saltuensis var. marcida (Hitchc.) B. Boivin

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References