First person to use this name on MO: Thomas Laxton
Plasmodium pink. Hypothallus thin and often protruding to form a white rim around the base. Aethaliate, depressed pulvinate, oval or ± irregular, 1-50 mm diam. and 1-3 mm thick, dark grey or olive-brown. Cortex thin and translucent, dehiscing irregularly. Pseudocapillitium shining, spongy, rigid and tough, forming a three-dimensional system of perforated plates. Spore-mass olive-coloured. Spores pale olive, in clusters of 5-25, turbinate and covered with long spines on the outside, almost smooth on the inside of the cluster, 10-13 µm diam.
Taken from: http://www.discoverlife.org/...