Phyllopsora himalayensis
Phyllopsora himalayensis is a species of bark-dwelling lichen in the family Ramalinaceae. It was described as a new species in 2011 by Gaurav Kumar Mishra, Dalip Kumar Upreti, and Sanjeeva Nayaka. It occurs in temperate parts of the Himalayas in northern India, where it grows on the bark of rough-barked trees in moist, humid forest at about 1,500–3,140 m elevation. The species epithet refers to the Himalayas, the type locality.
The thallus is squamulose with a thin white. The squamules are closely attached, rounded to elongate, sometimes overlapping, and about 0.1–0.5 mm wide, with a smooth pale green to yellow upper surface. It produces mostly globular isidia, and the and medulla contain crystals that dissolve in potassium hydroxide solution. Apothecia are common, up to 2.0 mm across, with a brown to dark brown. The ascospores are hyaline, simple, narrowly ellipsoid to fusiform, 5–10 × 1–2.5 μm. Pycnidia are also common, producing straight, rod-shaped conidia 6–12 × 1–1.5 μm. In terms of chemical spot tests, the thallus is K+ and C−/KC−/PD−, with atranorin detected by thin-layer chromatography.