Order: Peltigerales Family: Collemataceae
Species: Collema multipartitum
Photos: On limestone. The Burren, Co. Clare, Ireland.
Thallus loosely attached, rounded or irregular, much branched, deeply lobed. Lobes are narrow, fan-shaped, irregular and +/- contorted. Apothecia frequent, isidia absent. Ascus clavate with strongly thickened apex. Spores 3-septate, 26-43 x 4.5-6.5 Ám. Micro photos below.
On hard, exposed limestone. Frequent in the Burren, scattered distribution elsewhere in Ireland. Often occurs with C. polycarpon. Chemical reactions negative.