Menyanthes trifoliata L.

Montana: Lincoln County: Kootenai National Forest; Rainbow Lake; 24 mi N of Libby, MT off FS rd 68. Elev. 1292 m.
T33N R32W S6 S
Datum: NAD 27. Uncertainty: 800 meters. Coordinate Source: TRS2LL.
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 an additional 7 hectares. Littoral regions of lake characterized by scattered clumps Potamogeton amplifolius and Nuphar variegatum (neither very dense). Floating mat dominated by dense stand of Carex lasiocarpa, Menyanthes trifoliata, and C. muricata. Sphagnum cover well-dev. 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 chem: )mg/L) hardness 25.8 (CaCO3), Ca 6.2, Mg 2.4, K 0.8. Assoc.: C. rostrata, C. lasiocarpa, P. palustris, and D. anglica. Substrate saturated. Prominent, forming an almost solid, low-growing cover on floating mat. Few plants found in fruit, Phenology: Fruits.

R. Bursik 1159, Jun 25, 1988
With C. Clemens
ID, Accession: 100149, Barcode: ID130377