Verrucariaceae Verrucaria elaeina Growth type crustose Chemical results negative Common and can be abundant on limestone, concrete, siliceous rock and brick. Characteristic of shaded weakly calcareous rock in many habitats. The thallus is grey-green to pale brownish-green with numerous +/- immersed perithecia, the apex sometimes slightly irregular. Spores narrow ellipsoid, (15-)17.5-21(-24) x (6-)7.5-8.5(-9.5) µm. Similar: V. praetermissa. Thicker thallus, freshwater habitat

Verrucaria elaeina
On limestone. Portland, Dorset. March 2016