Collemataceae Scytinium turgidum (Leptogium turgidum) Growth type foliose Chemical results negative Probably under-recorded on calcareous soil and walls, also found on crumbling mortar. Shiny, thickish dark-olive to reddish-black thallus with small, turgid lobes that can appear shrubby, the upper surface often densely granular-isidiate. Apothecia either absent or abundant with concave discs. Spores 3-septate becoming muriform. Microscope photographs below. Intermediate morphs occur between Leptogium plicatile (with larger lobes) and Leptogium schraderi (cylindrical lobes)

Microscope photographs



Leptogium turgidum
St. Aldhelm's, Lytchett heath and Wareham, Dorset. January 2014, December 2016