Dichelyma uncinatum Mitt.

Montana: Mineral County: St. Regis River about 1 mi downstream from Twelvemile Creek. Lolo National Forest.
47.3467° N, 115.2773° W,
Uncertainty: 20 meters. "Mapped from specimen's GPS coordinates, which matched with auxiliary locality information. Standard 20 m uncertainty applied unless auxiliary information suggested otherwise."
In mature cottonwood stand with diffuse shrub understory. Attached to cobbles, cottonwood trunks, and old tires in a seasonally flooded river backwater behind a dike. Loose mats with pendant stems to 4 inches long. With Populus balsamifera, Cornus sericea, Amelanchier alnifolia, Philadelphus lewisii, Maianthemum stellatum, and several mosses.

Craig T. Odegard 229, Jul 16, 2014
MONTU, Accession: 164031