Petrophytum cinerascens (Piper) Rydb.
[= Petrophytum cinerascens]

Washington: Chelan: [locality and coordinates withheld; status in Washington: G1G2/S1S2 (Endangered; WANHP)],
North-facing steep granite bedrock cliffs with thin soil or bare rock. Veg cover <10%. With scattered Bromus tectorum, Poa bulbosa, Penstemon deustus, Epilobium brachycarpum, Salvia dorrii, & Poa secunda. Much of the cliffs along the highway burned in 2017 or 2018, but not this area. HerbariumSpecimenDuplicate: Petrophyton cinerascens Locally common but scattered. Plants mat forming, some as large as 30 x 30 inches. Https://intermountainbiota.org/portal/collections/individual/index.php?occid=33247801. Phenology: Bud, flowering.

Walter Fertig 33176, Jul 26, 2018
WS, Catalog: 411901, WS037100