Jungermannia atrovirens Dumort.
Annotated by David H. Wagner, 23 Oct 2018. Remarks: Verification Notes: oil bodies: 3-4 μm/cell, oblong - dull - not quite smooth; perianth appears shorter than bracts - J. hyalina? But no reddish rhizoids. Fits J. atrovirens, except perianth. (EH) Mature perianths exserted.

Washington: Chelan County: Okanogan-Wenatchee National Forest, Chelan Ranger District. Okanogan-Wenatchee NF Fen Study, Poison Springs. From Hwy 97 turn on to the Methow Valley road and follow it about 5 mi to the Black Canyon Road (FS4010.) Follow the 4010 all the way up to intersection with 8020 rd. Turn north onto 8020 and follow it approx. 5 mi to the headwaters of Poison Creek. The wetlands can be reached by walking down the unmaintained 145 spur to the creek and then walking up to the creek to the wetland. Elev. 5540 ft.
UTM Zone 10U, 708842E, 5328476N; T30N R21E WM, Sec. 22.
Aspect: 270%. Slope: 20%. Light: full shade. Topography: toeslope. ¶Habitat: This wetland is high up near the top of the ridge, a valley that strangely runs parallel to the ridge and contains several spring sites. Even though it has a fair slope (20 percent), moss development has taken place. It is a long narrow fen. ¶Associated Species: ABLA, PIEN, PICO, CADI6, LEGI, RILA, LOINS, VAMY2, LICA2, SALIX, RHAL2, LUPO2, SYFOF, SETR, PLAQ2, SAOD2, PYAS, PLST4, PLST4, PYSE, ERANA3, ARM04, CAREX, VEVI. Substrate: granitic rock.¶Location Notes: plants were growing on Spagnum, other mosses and wood substrates throughout the wetland. ¶[Envelope with multiple specimens, filed under the first name on packet.] Substrate: saxicolous.

Erica Heinlen 6414, Grace Kwak
WTU, Barcode: WTU-B-079567