Polymeridium albidovarians

Polymeridium albidovarians is a species of corticolous (bark-dwelling) lichen in the family Trypetheliaceae. The lichen was first discovered in Indonesia on the island of Java, specifically at the Kawi-complex, Tjemarakandang, at an altitude of 2700 m. This species closely resembles Polymeridium albidum, but is differentiated by its UV+ (yellow) thallus and. The yellowish-white, thallus features spherical,, solitary ascomata measuring 0.2–0.4 mm in diameter, with an apical ostiole. The hamathecium is inspersed with oil droplets, and the number eight per ascus, contain three septa, and measure 20–23 by 6–8 μm without ornamentation. The lichen's chemistry is characterized by the presence of lichexanthone.