Calliergon richardsonii (Mitt.) Kindb.
Annotated by David H. Wagner, 30 Mar 2016.

Washington: Okanogan County: Okanogan-Wenatchee National Forest, Tonasket Ranger District, Headwaters Sinlahekin Creek. Access at point where 3900 road crosses far upper Sinlahekin Creek. Wetland begins immediately west of road as a lightly wooded area that with further western travel becomes open meadow at the far northern end of the wetland system. Accessing site will require walking SW through lightly wooded (PICO) wetland to area of transition and then into norther end of open, SSE-NNW orientated wetland meadow. Elev. 6273 ft.
UTM Zone 11, 285283E, 5401373N; T37N R23E WM, Sec. 2.
Habitat: In the far northern portion of a half-mile long, narrow, apparently primarily groundwater wetted, mostly moss and sedge dominated wetland with frequently deep (52+ inches) organic soil.¶¶Associated Species: lichen/moss layer: AUPA70, SPHAG2, PLEL2, TONI70, HEBL2; herb layer: CATES, CAUT. ¶¶ Substrate: wetland.¶¶Location Notes: Specimens were incidental within a collection of an interesting leafy liverwort. Wetland overall with a notable number apparently rare or uncommon WA plant species including Carex tenuiflora; the mosses Splachnum spaericum, Calliergon richardsonii, Scorpidium scorpioides, S. cossoniim Paludella squarrosa, TONI70, and Fissidens osmundioides.

Rick Dewey RD072315-1608a, Jul 23, 2015
WTU, Barcode: WTU-B-079522