FIGURE 3 in Leprose and leproid lichens of the Galapagos, with a particular focus on Lepraria (Stereocaulaceae) and Septotrapelia (Pilocarpaceae)

FIGURE 3. Galapagos lichen thalli with pseudisidia; a Leprose thallus of Herpothallon granulare with granular 'pseudisidia' developing on fibrous hypothallus strands (Nugra 889; scale 5 mm); b–d Syncesia leprobola; b Thallus densely covered in pinkish pseudisidia (ecorticate, isidioid outgrowths); the thallus along the margin often aggregating into 'rhizomorphic' thallus strands (which are not exclusive to Syncesia rhizomorpha!), and clearly delimited by a deep brown arachnoid hypothallus (Bungartz 5021; scale 2.5 mm); c Densely pseudisidiate thallus; the only areas not covered in pseudisidia are regions where immature pseudothecia begin to develop (Bungartz 4810; scale 2 mm); d Densely pseudisidiate thallus with mature pseudothecia (Bungartz 8213; scale 1 mm).