Order: Peltigerales Family: Collemataceae
Species: Leptogium turgidum
UK photographs. Identified by Brian Coppins
Shiny, thickish dark-olive to reddish-black thallus with small, turgid lobes that can appear shrubby. The upper surface is often densely granular-isidiate, apothecia can be either absent or abundant.
Occurs on calcareous soil and walls, also found on crumbling mortar. There are few Irish records but it is probably under-recorded. Chemical reactions negative.
Intermediate morphs occur between Leptogium plicatile (larger lobes) and Leptogium schraderi (cylindrical lobes).
Leptogium turgidum February 2010