Irish lichens

Scytinium plicatile, Leptogium plicatile

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.

Leptogium plicatile

Leptogium plicatile
Scytinium plicatile (Leptogium plicatile) February 2010

All images used are copyright. Please contact me if you find errors.