Petrophytum hendersonii (Canby) Rydb.
Annotated by Ben Legler, 2011. Sources: Flora of PNW.

Washington: Mason County: Olympic National Forest: steep slope above Spur Road 360 east of Forest Service Road 2352 and 1.7 air miles SE of Spider Lake. Elev. 568 m.
47.393781° N, 123.397462° W
Datum: WGS 84. Uncertainty: 27 meters. Coordinate Source: GPS.
Steep, open, south-facing rocky slope among conifer forest; thin soil over basalt with sparse cover of shrubs and herbaceous vegetation including Holodiscus discolor, Acer glabrum, Sedum oreganum, Luina hypoleuca, and Festuca. Flowers past; plants forming loose clumps and mats on vertical rock face, locally common. Phenology: Flowers and Fruits.

Ben Legler 12061, Jul 23, 2011
WTU, Accession: 407167, Barcode: WTU-V-020300