The descriptive text, below the map, is from the Cornish Red Data Book (2009). The map on this web page depicts the organisms distribution and shows the records made pre-2000 and those made since.
Range & Status
(syn. Jungermannia caespiticia Lindenb.). Widespread in N. and C. Europe; also New York State and Alaska. In Britain, recent records are mainly from the Pennines of N. England, with isolated localities in mid-Wales and E. Cornwall. Formerly also E. Gloucestershire, Surrey and Isle of Wight.
One locality, near Luckett (SX37W), where it was recorded from 1963-1970.
Habitat & Ecology
The Cornish site is on damp, mineral-rich soil in old mine workings. Elsewhere it is a pioneer species of moist base-poor soils in a variety of habitats, including moorland edges, stream banks and reservoir margins. It is a dioicous species in which perianths are rare and capsules very rare; only sterile and male plants have been found in Cornwall. Gemmae occur frequently.
There is no recent information from the Cornish site, where it was last recorded in 1970.
I.J. Bennallick, S. Board, C.N. French, P.A. Gainey, C. Neil, R. Parslow, A. Spalding and P.E. Tompsett. eds. 2009. Red Data Book for Cornwall and the Isles of Scilly. 2nd Edition.Croceago Press.
The Cornish Red Data Book Project was led by the Cornwall and Isles of Scilly Federation for Biological Recorders (CISFBR). The full text and species accounts (minus the maps) are available on the CISFBR website.