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

Poa confinis Vasey
beach bluegrass (coastline bluegrass)
Poaceae (Grass family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #9408)

E-Flora BC Static Map
Distribution of Poa confinis
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Species Information

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General:
Perennial grass from fibrous roots, rhizomes and stolons; stems erect or decumbent, 7-30 cm tall, about 0.5 mm wide.
Leaves:
Sheath margins open 1/3-2/3 their length; sterile shoots slender, tufted; blades 0.5-1.5 mm wide, in-rolled, mostly threadlike, moderately thick, outer surface smooth, inner surface of blades of sterile shoots usually distinctly rough or minutely soft-hairy; ligules 0.5-2 mm long, the tips blunt to sharp-pointed, backs rough.
Flowers:
Inflorescence an erect panicle, 1-5 cm long, moderately congested, loosely contracted, the branches 1 to 2 per node, sparsely to distinctly rough; spikelets laterally compressed, 3-8 mm long, 2- to 5-flowered; glumes unequal, the lower ones 2.5-3 mm long, 1- to 3-nerved, the upper ones 3-4 mm long; rachillas hairless or sparsely minutely soft-hairy; lemmas lanceolate, 2.5-4 (4.5) mm long, the tips sharp-pointed, surface finely rough, hairless, or keel and some marginal nerves sparsely minutely soft-hairy below; calluses hairless or diffusely, shortly, sparsely cobwebby; palea keels rough; flowers of different plants female, male or all or partially bisexual (mixed female and bisexual); anthers vestigial or 1.5-2 mm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Semi-stable sandy sites and beaches in the lowland zone; infrequent in coastal BC; S to N CA.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Poa confinis

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) 2 2 2
Slope Gradient (%) 0 0 0
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
0
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
2 2 2
Modal Nutrient Regime
Class
A
Number of field plots
 species was recorded in:
1
Modal BEC Zone Class
CWH
All BEC Zones (# of stations/zone) species was recorded in: CWH(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.

Taxonomic and Nomenclatural Links

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General References