Polygonum cuspidatum Siebold & Zucc. × Polygonum sachalinense F. Schmidt
Annotated by Peter F. Zika, 2001. Remarks: Polygonum x bohemicum

Idaho: Nez Perce County: Garden Gulch Creek, 2 mi E. of Lapwai. Elev. 1360 ft.
T35N R03W S6
Datum: NAD 27. Uncertainty: 800 meters. Coordinate Source: TRS2LL.
Rangeland habitat, silt loam substrate. Bromus tectorum community, other common species Centaurea solstitialis, Conium maculatum, Hypericum performatum. Phenology: Flowers.

L. Lass s.n., Jul 6, 1993
With H. Carson
ID, Accession: 107990, Barcode: ID088469