Rumex praecox Rydb.
Annotated by Arthur Cronquist, 1941.

Idaho: Custer County: Boulder Creek near Wildhorse Creek, 25 miles S. W. of Chilly. Elev. 7300 ft.
Rocky edge. New to Idaho. Phenology: Flowers & Fruits.

Arthur Cronquist 3316, Jul 22, 1941
IDS, Accession: 2015.001, Barcode: IDS0032055