Calypso bulbosa var. occidentalis (L.) Oakes (Holz.) B. Boivin
Orchidaceae (Orchid family)

Introduction to Vascular Plants


© Gary Ansell     (Photo ID #13037)


E-Flora BC Static Map

Distribution of Calypso bulbosa var. occidentalis
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Species Information

Perennial herb from fleshy, cylindrical or globe-shaped corms; stems 5-20 cm tall, smooth but with 2 to 4 sheathing bracts.
Single basal, long-stalked, blades elliptical or heart- to egg-shaped, smooth, 3-6.5 cm long, stalks 1-6 cm long.
Inflorescence a single, showy, terminal flower, the flowers variegated with purple, pink, and yellow; sepals and lateral petals alike, magenta with 3 darker veins, narrowly lanceolate, 12-25 mm long; lip slipper-shaped, nodding, pouched, yellowish-purple to reddish-purple, variously spotted or streaked with darker purple, 15-25 mm long, the lower portion with apron, hairy above; hood-like column purplish, 8-11 mm long, widely egg-shaped, arched over pouch.
Capsules, erect, ellipsoid, 2-3 cm long.
Two varieties are found in BC

1. Bristlelike hairs on lips sparse, whitish; lip apron white, mottled or irregularly blotched with purple................... var. occidentalis (Holzinger) Boivin

1. Bristlelike hairs on lips numerous, yellow; lip apron yellowish................ var. americana (R.Br.) Luer

SourceThe Illustrated Flora of British Columbia


If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

Habitat and Range

Dry to moist, mossy forests in the lowland, steppe and montane zones; var. occidentalis - common W of the Coast-Cascade Mountains; var. americana - common E of the Coast-Cascade Mountains; circumpolar; var. occidentalis - N to AK and YT and S to ID and CA, Eurasia; var. americana - N to AK, YT and NT, E to NF and S to ME, VT, MI, WI, MN, SD, NM and AZ.

SourceThe Illustrated Flora of British Columbia


Synonyms and Alternate Names:
Calypso bulbosa subsp. occidentalis (Holz.) Calder & Roy L. Taylor