Navadni poprhar Phlyctis argena

Features

Thallus smooth, thin or thick then rough and cracked, pale green-white or grey-green when fresh, becoming creamy to pale brownish in dried specimens; forming small to large patches surrounded by a white prothallus.

Species	Lišaji
Living space	Bright forest, Deciduous forest
Size

Description

Soralia sometimes paler than the thallus, irregular, ulcerose, coalescing, soredia fine to coarsely granular, pale green to blue-green. Anamorph: conidia 5-6.5 × 3 μm, narrowly ellipsoidal, ± curved. Teleomorph: ascomata apothecia, rare, 200-500 µm diam., grey to grey-black, ± rounded but often irregular in outline, embedded within the thallus, concave to flat, ± pruinose. Thalline exciple elevated, granular. True exciple thin, flexuose, usually covered by the granules of the thalline exciple. Asci one-spored. Ascospores 90-130 × 30-50 μm, strongly muriform, without apiculate apices. Thallus C–, K+ blood-red (crystals), KC+ red, Pd+ orange-red, UV– (norstictic acid). It occurs more frequently on deciduous trees with a smooth crust in sunny positions, sometimes also on rocks and between mosses. It is common and resistant to pollution.