Order: Lecanorales       Family: Parmeliaceae Species: Melanohalea exasperata Growth type foliose. Photos: Ballingeary, Co. Cork and Kilcolman, Co. Limerick, Ireland Short olive-green, wrinkled, adpressed lobes, the numerous warts with pale craters. Under-surface with rhizines. Usually fertile, red-brown apothecia with thick, warted margins. Papillae flat-topped with pseudocyphellae at their tips. Isidia absent. Asci are 8-spored, spores simple, 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 Abrothallus bertianus

Microscope photographs



Melanohalea exasperata. August 2009 and August 2024