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

Platanthera unalascensis
Alaska rein orchid
Orchidaceae (Orchid family)

Introduction to Vascular Plants

© Adolf Ceska  Email the photographer   (Photo ID #5652)

E-Flora BC Static Map
Distribution of Platanthera unalascensis
Click here to view our interactive map and legend
Details about map content are available here
Click on the map dots to view record details.

Species Information

Click on the image below to view an expanded illustration for this species.

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.

Source: The Illustrated Flora of British Columbia

Habitat / 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.

Source: The Illustrated Flora of British Columbia

Synonyms and Alternate Names

Piperia unalascensis (Spreng.) Rydb.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References