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

Stellaria obtusa Engelm.
blunt-sepaled starwort (Rocky Mountain chickweed)
Caryophyllaceae (Pink family)

Introduction to Vascular Plants

© Ryan Batten  Email the photographer   (Photo ID #66786)

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Distribution of Stellaria obtusa
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Species Information

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Perennial herb from a slender rhizome; stems prostrate to ascending, several, branched, matted, glabrous, 3-20 cm tall/long.
Basal leaves lacking; stem leaves opposite, egg-shaped, abruptly sharp-pointed, 5-12 mm long, 2.5-8.0 mm wide, glabrous except for a few long basal, marginal hairs, unstalked or the lower ones short-stalked; stipules lacking.
Inflorescence of solitary flowers in the leaf axils; petals lacking; sepals 4 or 5, egg-shaped to elliptic, 2-3 mm long, very slightly or not at all papery on the margins, more or less obtuse.
Capsules globose-egg-shaped, 2-4 mm long, 6-valved; seeds 0.6-0.7 mm long, dark brown, finely though distinctly cross-wrinkled with undulate ridges.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Wet to moist meadows and streambanks in the montane zone; rare E of the Coast-Cascade Mountains in S BC; N to S AK, E to AB and S to CO and CA.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Stellaria obtusa

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) 525 1577 2257
Slope Gradient (%) 3 13 30
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
0 22 340
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
2 4 6
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: AT(4), IDF(2)


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

Alsine obtusa (Engelm.) Rose
Alsine viridula Piper
Alsine washingtoniana (B.L. Rob.) A. Heller
Stellaria viridula (Piper) H. St. John
Stellaria washingtoniana B.L. Rob.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References