Pertusariaceae Pertusaria hymenea Growth type crustose Chemistry: Cortex: K-, C+ yellow, KC+ orange, UV+ orange. Medulla: K- Usually on shaded, smooth or rough-barked trees. Rare on shaded rocks Very variable. Thick grey to grey-green thallus with slightly zoned margin, warts with 1(-4) apothecia with thick, crenulate margins, the discs +/- open. Asci are 8-spored, thick walled simple spores 60-110 x 30-50 µm. Microscope photographs below. Associated lichenicolous fungi include Laeviomyces pertusariicola and Dactylospora parasitica Similar: P. pertusa. Discs less open, 2-7 apothecia in each wart

Microscope photographs



Pertusaria hymenea
Holton Lee, Upton Park and Kingston Lacy, Dorset. December 2012, January 2013, November 2016