Identification has been an important interest of the members from the start of the Moss Exchange Club. Field meetings and workshops are held by the Society that allow training in identification skills. Census Catalogues, of the distribution of bryophytes in the British Isles by
vice-county were compiled by the Moss Exchange Club. From 1960 onwards recording has been more detailed and the records have been incorporated into UK atlases and on-line records.
Habitat destruction and atmospheric pollution have major effects on bryophyte distributions, but there have been concerns about the effects of collecting, especially of rarer species. The Society has adopted the
BSBI code of conduct for picking, collecting, photographing and enjoying wild bryophytes. A collection of specimens was built up by the Society, with additions bequeathed by some members. Some of this
herbarium were shared or donated in full to the
Natural History Museum, London where the herbarium was co-located. From 1946 the Society only added
voucher specimens related to distribution records. It consisted of around 21,000 specimens in 1969 and was moved to the
National Museum of Wales, Cardiff. Several hundred voucher specimens continued to be added annually, along with some bequests. By 2021 the total was 45,000 specimens. ==Society publications==