Order: Peltigerales       Family: Collemataceae Enchylium polycarpon (Collema polycarpon) Growth type foliose. Identified by Brian Coppins Photos: On roadside wall. Corran, the Burren, Ireland. 'Cushion like' thallus when wet of numerous thick, +/- contorted, +/- radiating lobes, usually acending at centre. Numerous terminal apothecia, asci 8-spored, spores 1-3 septate, 18-28 × 6.5-8.5 µm, fusiform with acute apices. Isidia are absent. Occurs on exposed, hard, moist limestone and is often found with Collema multipartum. Most frequent in the Burren, Co. Clare and in west and central Ireland. Chemical reactions negative.

Enchylium polycarpon (Collema polycarpon). On roadside wall, Corran, Co. Clare. April 2009