Platanthera dilatata (Pursh) Lindl. ex Beck var. albiflora (Cham.) Ledeb.
Annotated by Charles F. Williams, 2010. Sources: FPNW/USDA-NRCS Plants Database. Remarks: taxonomic update

Idaho: Fremont County: Site 17. Targhee National Forest. Along Henry’s Lake Outlet upstream from the bridge on the road from Island Park Lodge to Big Springs. Some of the collections may have been made in sections 17,18, 19, and 21, but they were all made in or in the margins of, Henry’s Lake Flats; Elevation 1950m. Elev. 1950 m.
44.52329° N, 111.2870235° W; T14N R44E S20 SW 1/4
Datum: WGS 84. Uncertainty: 500 meters. Coordinate Source: BioGeomancer.
Marshy meadows, wood margins, and edges of streams and springs. Associated with Geranium richardsonii, Pedicularis groenlandica, Thalictrum occidentale, and Carex aquatilis. Voucher: Whitehead, G.S. 1983. M.S., Idaho State U. Flora of the Island Park Geothermal Study Area. Duplicates to: IDS, RM. Phenology: Flowers.

Gordon S. Whitehead 446, 6/29/1977-7/4/1977
IDS, Accession: 2012.012, Barcode: IDS0021415