Carex aurea Nutt.

Montana: Lincoln County: Kootenai National Forest, Rainbow Lake, 24 mi N of Libby, MT off FS rd 68. Elev. 4237 ft.
T33N R31W S6 S 1/2
Datum: WGS 84. Uncertainty: 1138 meters. Coordinate Source: Calc. from TRS. Updated PLSS locality from R32W to R31W.
Ca. 7 hectare lake surrounded by a floating Sphagnum mat on the E side and non-floating sedge fen on the S, W and N that covers and additional 7 hectares. Littoral regions of lake characterized by scattered clumps of Potamogeton amplifolius and Nuphar variegatum (neither very dense). Floating mat dominated by dense stand of Carex lasiocarpa, Menyanthes trifoliata, and C. interior. Sphagnum well-developed in places, absent in others. Slightly raised, hummocky peatland margins dominated by C. lasiocarpa, C. lenticularis, and Calamagrostis canadensis. A stand of 7 m high Alnus incana borders peatland/upland forest. Forest mixed w/ Pien, Pico, Laoc, and few Abla. Water chemistry (mg/L): hardness 25.8 (CaCO3), Ca 6.2, Mg 2.4, K 0.8. Abundance; prominent w/ C. lasiocarpa, and C. rostrata on slightly raised peatland margin next to alder stand on well-decomposed, moist peat w/ no moss accum. Hummock-forming. Phenology: Fertile.

R. Bursik 1137, Jun 25, 1988
With C. Clemens
ID, Accession: 99380, Barcode: ID016262