Melanohalea exasperata Parmeliaceae
Melanohalea exasperata

Growth type foliose
Chemical reactions negative.

Found on the well-lit twigs and branches of acid-barked deciduous trees but rarely occurs on trunks.

The olive-green, wrinkled and adpressed lobes are covered with numerous warts with pale craters. Usually fertile, the reddish-brown apothecia with thick, warted margins and simple spores, 9-12 x 5-6 Ám. Isidia are absent. Microscope photograph below.

Sometimes host to an undescribed species of Abrothallus


Melanohalea exasperata


Melanohalea exasperata


Melanohalea exasperata

Microscope photograph
Melanohalea exasperata
Melanohalea exasperata
Holton Lee and Studland, Dorset. December 2012 and 2013

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