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

Phleum alpinum L.
alpine timothy
Poaceae (Grass family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #4324)

E-Flora BC Static Map
Distribution of Phleum alpinum
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, strongly tufted grass from fibrous roots; stems often decumbent, and rooting at the nodes, not bulbous at the base, 15-50 cm tall/long.
Leaves:
Sheaths smooth; blades flat, 4-7 mm wide, the margins rough; ligules blunt, nearly entire, 1-3 (4) mm long; ear-shaped lobes at the leaf-bases lacking or small and blunt to rounded, more obvious on the upper leaves.
Flowers:
Inflorescence a nearly globe-shaped to short-cylindrical panicle, 1-4.5 cm long, often over 1 cm wide when pressed; glumes hairy on the sides, fringed with long, bristlelike hairs on the keels, 3.5-4.5 mm long, abruptly narrowed to the stout awns, the awns 1.5-2.5 (3) mm long; lemmas short-hairy, toothed by the 5 nerves, 2-2.5 mm long; paleas nearly equal to the lemmas; anthers 1-1.4 (1.5) mm long.

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

Flower Colour:
Yellow
Blooming Period:
Late Spring
Source:  The USDA

Habitat / Range

Moist to mesic meadows and streambanks from the montane to alpine zones; common throughout BC except rare on the Queen Charlotte Islands and Vancouver Island; circumpolar, N to AK, YT and NT, E to NF and S to NH, ME, SD, NM, AZ and CA; Greenland, Iceland, Eurasia, S America.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Phleum alpinum

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) 7 1879 2563
Slope Gradient (%) 0 21 220
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
0 164 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 4 8
Modal Nutrient Regime
Class
C
Number of field plots
 species was recorded in:
1008
Modal BEC Zone Class
ESSF
All BEC Zones (# of stations/zone) species was recorded in: AT(76), BAFA(88), BWBS(3), CMA(4), CWH(5), ESSF(649), IMA(49), MH(19), MS(32), SBPS(3), SBS(5), SWB(23)

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 alpine tundra & boreal.

Synonyms and Alternate Names

Phleum alpinum var. commutatum (Gaudin) Griseb.
Phleum commutatum Gaudin
Phleum commutatum var. americanum (Fourn.) Hultén

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References