Platanthera unalascensis
Alaska rein orchid
Orchidaceae (Orchid family)

Introduction to Vascular Plants


© Adolf Ceska     (Photo ID #5652)


E-Flora BC Static Map

Distribution of Platanthera unalascensis
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Species Information

Perennial herb from tubers, 1-4 cm long, with a few fibrous roots; stems 15-90 cm tall.
Basal 2 to 5, oblanceolate, 7-15 cm long, 0.5-4 cm wide; stem leaves bractlike.
Inflorescence a terminal, spikelike raceme, 5-40 cm long, usually open, sometimes densely-flowered above, the flowers small, green, faintly-scented, the scent pleasant; sepals 2-5.5 mm long, lanceolate, the upper sepal ascending or pointed forward; petals 2-5.5 mm long, lanceolate, somewhat erect to pointed forward; lip 2-5 mm long, oblong to triangular, usually pointed downward, the tip upcurved; spur 1.5-5 mm long, pointed back or downward.
Capsules, ellipsoid, ascending to erect.

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 coniferous forests, grassy slopes, meadows, thickets and streambanks in the lowland, steppe and montane zones; frequent throughout BC south of 56 degrees N, especially east of the Coast-Cascade Mountains; N to AK, E to NF and S to MI, SD, NM, UT, NV and CA; Baja CA.

SourceThe Illustrated Flora of British Columbia


Synonyms and Alternate Names:
Piperia unalascensis (Spreng.) Rydb.