Scirpus rollandii Fern.
[= Trichophorum pumilum]
Annotated by ITIS, 20 Mar 2009. Remarks: Trichophorum pumilum became a jr synonym of Scirpus rollandii

Montana: Teton County: [locality and coordinates withheld; status in Montana: S3 (Rare; MTNHP)],
Common in a small fen west of the road. On humics with Potentilla fruticosa, Juniperus horizontalis, and Lobelia kalmii. In limestone parent matterial. Lat/long listed on label as "N 48, 00, 203 W 112, 36, 743". Phenology: Flowers and Fruits.

John R. Pierce 1785, Jul 27, 2004
MONTU, Accession: 130643