ATRAGENE TENUILOBA (Gray) Britton,Bull. Herb. Boiss. 3: 206. 1895.
Clematis alpina var. occidentalis subvar. tenuiloba A. Gray in Newton & Jenney, Rep. Geol. Black Hills, 531. 1880.
Clematis Pseudoatragene var. snbtriternata Kuntze, Verh. Bot. Ver. Prov. Brand. : 160. 1884.
This species' has been reported hitherto only from the Black Hills and Colorado Mountains. In the Little Belt Mountains near Neihart Pass, at an altitude of 7000 ft., Aug. 10, 1895, Flodman no. 467; also near Helena in 1895, Rydberg, no. 2652.