Order: Peltigerales       Family: Collemataceae Species: Scytinium plicatile (Leptogium plicatile) Growth type foliose. UK photographs. Identified by Brian Coppins Variable. Convoluted dark olive-brown or red-brown thallus, loosely rosette-shaped, closely adpressed. Thick, tough, +/- ridged lobes with divided, pleated margins (most noticable when dry). Coarse, isidia-like warts are sometimes present, apothecia infrequent. Found on hard, damp limestone and horizontal tombstones. Occasional on siliceous rock affected by calcareous seepage. Similar: Collema auriforme. Becomes jelly-like when wet.

Scytinium plicatile (Leptogium plicatile) February 2010