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

Agrostis oregonensis Vasey
Oregon bentgrass
Poaceae (Grass family)

Introduction to Vascular Plants
Once images have been obtained, photographs of this species will be displayed in this window.Click on the image to enter our photo gallery.
Currently no image is available for this taxon.
E-Flora BC Static Map
Distribution of Agrostis oregonensis
Click here to view the full interactive map and legend
Details about map content are available here
Click on the map dots to view record details.

Species Information

Click on the image below to view an expanded illustration for this species.



General:
Perennial, tufted grass from fibrous roots, the tufts scattered; stems 12-75 cm tall.
Leaves:
Sheaths smooth; blades 10-30 cm long, 2-4 mm wide, flat; ligules 2-4.5 mm long.
Flowers:
Inflorescence egg-shaped, usually very loose and open, 8-35 cm long, at least twice as long as wide, the branches spreading, the lower branches 2-10 cm long, ascending, branching above the middle; spikelets sparse; glumes 2.2-3.6 mm long; lemmas 1.5-2.5 mm long, awnless, the callus hairs sparse, to 0.2 mm long; paleas absent or if present, as thin membranes less than 1/4 as long at the lemmas, to 0.2 mm long; anthers 0.5-1.2 mm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist to wet meadows, streamsides, bogs, fens and forest openings in the lowland zone; frequent in coastal BC; N to AK and S to WY, ID, NV and CA.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Agrostis oregonensis

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) 238 630 1630
Slope Gradient (%) 0 4 15
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
135 201 320
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
6 6 8
Modal Nutrient Regime
Class
D
Number of field plots
 species was recorded in:
30
Modal BEC Zone Class
CWH
All BEC Zones (# of stations/zone) species was recorded in: CDF(1), CWH(25), ESSF(1), IDF(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 cool temperate & cool mesothermal.

Taxonomic and Nomenclatural Links

Additional Photo Sources

Related Databases

General References