A common and distinctive red fruited lichen, found on rotting wood and peat banks on heaths and moorland. The podetia are very variable and care must be taken to distinguish it from Cladonia macilenta (podetia finely soredate with K+ yellow reaction)

References: 
Smith, C.W. et al. editors (2009) The Lichens of Great Britain and Irelandd
Dobson, F.S. (2018) Lichens: an Illustrated Guide to the British and Irish Species
Ahti, Stenroos & Moberg. editors (2013) Nordic Lichen Flora. Volume 5 Cladoniaceae