Categories DavidCastle grounds December fungi: redlead roundhead Post author By David Post date 18 December 2015 Redlead roundhead mushrooms, small but with a bright red cap.Originally from Australia. First recorded in Britain in 1957, growing on sawdust. Nowadays quite widespread, usually growing on wood mulch. ← Castle grounds December fungi: magpie and roundhead → Castle grounds December fungi: more magpie inkcaps