Northwest Naturalist

Xanthoria polycarpa “Pincushion Xanthoria”

Council Grove State Park, MT
March 16, 2015
Robert Niese

This lichen is relatively common on the old twigs of Populus and Pinus in open, nutrient-enriched areas (e.g. cow pastures) of the PNW. On angiosperm twigs, they tend to grow in a small pincushion-like form no more than 25mm across.