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Piperia unalascensis (Alaska rein orchid)
Bransford, W.D. and Dolphia

Piperia unalascensis

Piperia unalascensis (Spreng.) Rydb.

Alaska Rein Orchid, Slender-spire Orchid

Orchidaceae (Orchid Family)

Synonym(s): Habenaria unalascensis, Platanthera cooperi, Platanthera unalascensis, Spiranthes unalascensis

USDA Symbol: PIUN3

USDA Native Status: L48 (N), AK (N), CAN (N)

1 or few stems, leafy near base, with pale green, bilaterally symmetrical flowers in long, slender, open racemes.

The species name comes from Unalaska, an island in the Aleutians. A number of small northern orchids were formerly put in the inclusive genus Habenaria, which has been divided into several smaller genera, including Piperia.


From the Image Gallery

1 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb
Leaf Complexity: Simple

Bloom Information

Bloom Time: Jun , Jul , Aug


USA: AK , CA , CO , ID , MI , MT , NM , NV , OR , SD , UT , WA , WY
Canada: AB , BC , ON
Native Distribution: Alaska south and east to Quebec, and south to Baja California, northern Nevada, Utah, Colorado, western South Dakota, and Minnesota; also near Great Lakes.
Native Habitat: Dry woods, gravelly streambanks, and open slopes.

National Wetland Indicator Status

This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

Additional resources

USDA: Find Piperia unalascensis in USDA Plants
FNA: Find Piperia unalascensis in the Flora of North America (if available)
Google: Search Google for Piperia unalascensis


Record Modified: 2007-01-01
Research By: TWC Staff

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