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Order: Lecanorales
Family: Parmeliaceae
Species: Melanohalea exasperata Photos: On Salix twigs. Ballingeary area, Cork, SW Ireland. Short olive-green, wrinkled and adpressed lobes with numerous warts with pale craters. Under-surface with rhizines. Usually fertile, red-brown apothecia with thick, warted margins. Papillae are flat-topped with pseudocyphellae at their tips. Isidia are absent. The asci are 8-spored with simple spores, 9-12 x 5-6 µm. Microscope photographs below. On well-lit twigs and branches of acid-barked deciduous trees, rarely occurs on trunks. Chemical reactions negative. Sometimes host to an undescribed species of Abrothallus |
Microscope photographs
Melanohalea exasperata. February and August 2009. (Previously Melanelia exasperata)