Parmotrema erectociliatum

The upper thallus surface of Parmotrema erectociliatum is whitish gray to ivory and can have a shiny or dull appearance, with some irregular cracking. The upper surface is covered in soredia, which are powdery structures that contain fungal spores. The soralia (structures that produce the soredia), are located at the margins of the lobes and can be linear or crescent-shaped. The lobes are broad, small to moderate-sized, 2–7 mm wide, and rotund in shape. The edges of the lobes are defined by a conspicuous black rim and have long, stout, and slender cilia that are black, mostly straight, and typically 0.5–1 mm long. The lower surface of the lichen has a narrow, blackened area that is 0.5–1 mm wide, with short, stout, and black rhizines. Apothecia and pycnidia, which are reproductive structures, were not observed in this species.^[2]

The cortex contains atranorin, while the medulla has salazinic acid. The expected results of standard chemical spot tests in the cortex are P+ (yellow),K+ (yellow), KC−, C−, UV−; and in the medulla P+ (deep yellow), K+ (yellow soon turning dark red), KC−, C−, UV−.^[2]

• List of Parmotrema species