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McAdoo, David R.
Platanthera orbiculata (Pursh) Lindl.
Lesser roundleaved orchid, Roundleaf Rein Orchid, Round-leaved orchid
USDA Symbol: PLOR4
USDA Native Status: Native to U.S.
1 stalk rising between 2 broadly elliptical or round basal leaves lying on ground, bearing up to 25 white or greenish-white, bilaterally symmetrical flowers in a raceme.
This species has the largest flowers of all western rein orchids. Several kinds of moths feed on nectar in the spur and probably pollinate the flower.
Bloom InformationBloom Time: Jun , Jul , Aug
AK , CT , ID , IL , IN , MA , MD , ME , MI , MN , MT , NC , NH , NJ , NY , OH , PA , RI , SD , TN , VA , VT , WA , WI , WV Canada: NB
, PE Native Distribution:
British Columbia east to Labrador and south to northern Oregon, northern Idaho, and northwestern Montana; also in northern regions of eastern United States. Native Habitat:
Moist forest floors. USDA Native Status: L48(N), AK(N), CAN(N),
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Record Modified: 2012-09-30
Research By: TWC Staff