Habitat: Pine forests.
Substrate: Pinus boles and roots.
Spores: Annual in fall.
Conservation Status: Not of concern
Annual conk produced in fall and persisting into winter. Fruitbody may be either a semicircular bracket or a top-shaped, stemmed, terrestrial conk. Terrestrial fruitbodies are growing from roots. Cap is shades of brown and velvety. Pores are small, round, light-colored, and refracting. Taste is lemon, and a blackish reaction to KOH. Similar to Phaeolus schweinitzii which has greenish, larger, more irregular pores.
PNW Herbaria: Specimen records of Onnia triquetra in the Consortium of Pacific Northwest Herbaria database
CalPhotos: Onnia triquetra photos