Ahtiana pallidula (aka Cetraria pallidula, Pallid Candlewax Lichen)
Substrate: On conifers such as Douglas Fir, Ponderosa pine, & Western Larch at low to medium elevations.
Description: Thallus pruinose, at least at lobe tips; lower surface pale yellow, wrinkled. Thallus loosely attached to ascending, pale yellow or greenish yellow, often pruinose on some lobes, with rounded, sometimes toothed lobes 4-10 mm wide; soredia & isidia absent; lower surface pale yellow, strongly wrinkled with a network of sharp ridges; rhizines abundant, pale, & slender. Apothecia abundant, produced on the margins, up to 10 mm in diameter, disks brown; black pycnidia rpominent, marginal or laminal.
Bibliography: Lichens of North America, by Brodo, Sharnoff, & Sharnoff
Database Entry: Distance Everheart 12-26-13