D. York 3365 with Julie Kierstead, Ellen Uhler, Michael Uhler, and Jennifer Whipple, 18 June 2022
United States, California, Siskiyou County, Shasta-Trinity National Forest, The Eddys, ridge between China Mtn. and Mount Eddy a few m E of the county line, ca. 210 m N-NW of Parks Creek Trailhead. Annual with white (appendages yellow) flowers, rare, growing in serpentine soils on a S-facing, exposed, gravelly slope, serpentine soil, gravelly, associated taxa: Danthonia unispicata, Eriogonum siskiyouense, Eriogonum umbellatum var. humistratum, Eriogonum umbellatum var. nelsoniorum, Eriophyllum lanatum, Festuca idahoensis, Penstemon roezlii, and Pinus jeffreyi. 41.34458, -122.53863, 2100 m (6888 feet) elevation.
Holotype: CAS1352444; Isotype: HSC105848