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

Calamagrostis lapponica (Wahlenb.) Hartm.
Lapland reedgrass
Poaceae (Grass family)

Introduction to Vascular Plants

© Ryan Batten  Email the photographer   (Photo ID #52974)

E-Flora BC Static Map
Distribution of Calamagrostis lapponica
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Species Information

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Perennial grass from fibrous roots and rhizomes; stems 30-90 cm tall, unbranched, with 2 to 3 nodes.
Leaf blades 5-15 cm long, 2-4 mm wide, flat or in-rolled, rough short-hairy above, smooth below; ligules 1.5-4 mm long, entire.
Inflorescence a lax panicle 4-12 cm long, its branches up to 4 cm long and appressed to somewhat spreading; spikelets 1-flowered; glumes 4-5.5 mm long, thin, long-pointed, rough, at least on the keels, usually purplish below, often becoming bronze-coloured at the tips; lemmas 3.5-5 mm long, finely rough short-hairy, translucent at the summits, the awns slender, straight to somewhat twisted and bent, reaching the tips of the lemmas, the callus hairs somewhat tufted, of varying length, mostly as long as the lemmas; paleas slightly shorter than the lemmas, thin and translucent; rachillas about 1 mm long, with copious hairs reaching the tips of the lemmas; anthers usually poorly developed and sterile.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Mesic to moist sites in the montane to alpine zones; infrequent in N BC east of the Coast-Cascade Mountains; circumboreal, N to AK, YT and NT and E to NF; Greenland, Eurasia.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Calamagrostis lapponica

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) 1044 1732 2580
Slope Gradient (%) 0 11 60
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
140 238 320
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 3 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: BAFA(14), ESSF(2), IMA(1), SWB(3)


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.

Synonyms and Alternate Names

Calamagrostis lapponica var. alpina Hartm.
Calamagrostis lapponica var. groenlandica Lange
Calamagrostis lapponica var. nearctica A.E. Porsild

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References