Pseudocalliergon trifarium (Web. & Mohr) Loeske
Annotated by Joe C. Elliott, Jan 2017.

Montana: Missoula County: About 12 air miles WSW of Seeley Lake townsite, at head of Boles Creek in Elk Meadow.
47.1005° N, 113.7126° W,
Uncertainty: 10 meters. Mapped from area marked on quad map provided in Odegard survey of 8/27/2013.
Flat slope. Calcareous marsh/meadow complex. Associated with Carex lasiocarpa, Deschampsia cespitosa, Utricularia minor, Chara, Potamogeton gramineus, Triglochin maritima, Scorpidium scorpiodes, Drepanocladus. Submerged to predominantly emergent in 1-5 inches standing water among sedges and other mosses. Highly calcareous silt loam soil. Woven among other mosses, with upright stem tips. Uncommon.

Craig T. Odegard 217, Aug 27, 2013
MONTU, Accession: 161099