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All Fungi
Phlyctis argena
Nomenclature
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Family: PhlyctidaceaeGenus: Phlyctis
SUMMARY
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. 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 (75-)90-130(-140) × (25-)30-50 μm, strongly muriform, without apiculate apices.
Chemistry: thallus C–, K+ blood-red (crystals), KC+ red, Pd+ orange-red, UV– (norstictic acid).