Lepraria celata
Lepraria celata is a species of leprose lichen in the family Stereocaulaceae. The powdery greyish-green lichen, described as a new species in 2006, occurs in eastern Europe.
Taxonomy
The species was described as new to science by Šárka Slavíková-Bayerová in 2006. The type specimen was collected in Ukraine and is housed in the Charles University Herbarium, Prague. The type specimen was collected in western Ukraine, in the Eastern Carpathians, north of Rakhiv. It was found on the western slope of Terentin Mountain, near its peak, at an elevation of. The specimen was growing in a shaded fissure of siliceous rocks above the tree line. It was collected on 19 July 2004 by S. Bayerová and is preserved as the holotype in the Charles University herbarium. The species epithet celata is derived from the Latin word meaning "hidden", referring to the species' long period of being unrecognised.Description
This lichen forms a powdery grey-green to pale grey crust with edges that can be either diffuse or clearly defined. It lacks and has no true inner layer. The base layer consists of sparse patches of white threads. The reproductive structures consist of abundant fine powder-like typically measuring 35–50 μm in diameter. Projecting threads are rarely present on these granules, and when present are short.The species contains atranorin and roccellic/angardianic acid. The results of standard chemical spot tests are K− or +, C−, and Pd−.