Nash, T.H., Ryan, B.D., Gries, C., Bungartz, F., (eds.) 2002. Lichen Flora of the Greater Sonoran Desert Region. Vol 1.

Thallus: crustose, effuse, film-like, smooth or slightly uneven, or evanescent upper surface: grayish, greenish or yellowish green to brownish, subgelatinous when wet Perithecia: almost globose, up to 0.45 mm in diam., fully immersed with only the ostioles showing as black dots; exciple: dark brown or black, laterally 20-30 µm thick, lacking periphyses; paraphyses: simple, few to many, c. 2.5 µm thick asci: subcylindrical, 130-170 x 17-25 µm, 8-spored ascospores: simple, (sub-)biseriate, narrowly ellipsoid, c. 18-26 x 7-10 µm Spot tests: all negative Secondary metabolites: none detected. Substrate and ecology: on loamy or sandy soil, mosses or detritus, in sheltered places from lowlands to alpine regions World distribution: widespread, often in holarctic regions of Eurasia, North and South America, and New Zealand Sonoran distribution: NW Baja California and Guadalupe Island.