Thelesperma subnudum Gray var. marginatum (Rydb.) T.E. Melchert ex Cronq.
[= Thelesperma subnudum]
Annotated by Peter Lesica, Aug 2008. Remarks: Tetradymia canescens var inermis became a jr synonym of Tetradymia canescens

Montana: Musselshell County: Dean Creek; ca. 6 miles southeast of Lavina. Elev. 3500 ft.
46.3166265° N, 108.7279227° W
Coordinate Source: USGS-website.
Common in open, sandy soil beneath scattered ponderosa pine on a moderate south-facing slope above a branch of Dean Creek. With Agropyron spicatum and Hedeoma drummondii. Phenology: Flowers.

Peter Lesica 3877, Jun 22, 1986
MONTU, Accession: 104382