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

Achnatherum lemmonii subsp. lemmonii
Lemmon's needlegrass
Poaceae (Grass family)

Introduction to Vascular Plants
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E-Flora BC Static Map
Distribution of Achnatherum lemmonii subsp. lemmonii
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Species Information

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Perennial tufted grass from fibrous roots; stems 15-90 cm tall.
Sheaths open, smooth to hairy with short hairs; lower blades 0.5-1.5 mm wide, upper blades to 2.5 mm wide; lower ligules 0.5-1.2 mm long, blunt to pointed, the upper ligules to 2.5 mm long.
Inflorescence a narrow panicle, 7-21 cm long, the branches straight, appressed to ascending, the spikelets appressed to the branches; florets somewhat flattened laterally rather than rounded; glumes 7-11.5 mm long, smooth; lemmas 3-4.5 mm long, leathery, smooth above, short-hairy below, the hairs 0.5 mm long, the tips with thick, 0.1 mm long lobes at the ends, awned, the awns 16-30 mm long, the first segments rough or short-hairy, persistent; paleas 3/4 as long as the lemmas or nearly equal to them, the calluses 0.4-1.2 mm long, blunt.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Mesic to dry, open slopes in the lowland and montane zones; infrequent in SW BC, rare in SC BC; S to MT, AZ and CA.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Achnatherum lemmonii ssp. lemmonii

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) 215 361 814
Slope Gradient (%) 15 55 210
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
120 204 330
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 1 3
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: CDF(5), ICH(1)

Synonyms and Alternate Names

Achnatherum lemmonii (Vasey) Barkworth

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References