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

Coeloglossum viride var. virescens (L.) Hartm. (Muhl. ex Willd.) Luer
long-bracted frog orchid
Orchidaceae (Orchid family)

Introduction to Vascular Plants

© Heinz Baum  Email the photographer   (Photo ID #6159)

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Distribution of Coeloglossum viride var. virescens
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Species Information

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Perennial herb from fleshy roots, smooth throughout; stems 15-60 cm tall, leafy.
Stem leaves only, several, egg-shaped to oblong or oblanceolate, 4-15 cm long, 1-6.5 cm wide.
Inflorescence a few- to many-flowered terminal raceme, the bracts leaflike, ascending, lanceolate, several times longer than flowers, the flowers green to yellowish-green; sepals egg-shaped, 3-6 mm long, spreading; petals much narrower than sepals, narrowly lanceolate, 3-5 mm long; lip 6-10 mm long, wedge-shaped to oblong, 2- or 3-toothed at tip; spur shorter than lip, scrotum-shaped.
Capsules, ellipsoid, somewhat erect, about 12 mm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Mesic to wet forests, grassy slopes, shores, bogs and swamps in the lowland, steppe and montane zones; infrequent throughout BC east of the Coast-Cascade Mountains, rare along the coast; N to AK, YT and NT; E to NF and S to ME, PA, NC, TN, MO, NE, NM, AZ and WA; E Asia.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Coeloglossum viride var. virescens

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) 930 1213 1550
Slope Gradient (%) 2 36 62
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
153 174 190
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
2 3 4
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: ESSF(1), IDF(1), SBPS(1)


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.

Taxonomic and Nomenclatural Links

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General References