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Cephalozia connivens:

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Cephalozia connivens (Dicks.) Lindb.                                                       Forcipated Pincerwort __________________________________________________________________________________

 

This liverwort has flattened pincer-shaped leaves that are almost longitudinally inserted, in common with the closely related species C. lunulifolia, C. macrostachya, and C. loitlesbergeri.  It has very long decurrent margins to the rear of its leaves, much more so than the others, and together with C. loitlesbergeri is monoecious, the other two being dioecious. It has leaf cells that at the base of the lobes  are much larger at 32-56mm long and 32-56mm wide than those of C. lunulifolia & C. loitlesbergeri, but all of these species need to have perianths for certain identification. [see illustrated key]. They are all plants of shaded, boggy sites growing on Sphagnum, Leucobryum or on wet rotting wood in very acid conditions compared with C. bicuspidata which will tolerate a range of pH from 1-3.

All records:

 
TQ49/TL40   18/19 Epping Forest, 1927. W C R Watson. Conf. H. H. Knight.
TQ49 40,95 18 Epping Forest, Cuckoo Pits, on wood.  1964. Eric Saunders.
  413,964 18 Epping Forest, Strawberry Hill Gravel Workings, south east corner on bank of pool with Sphagnum fimbriatum and Calypogeia mulleriana and Pleurozium schreberi. 12 May 1984 & 19 June 1985. Kenneth J. Adams. (Herb.KJA).
TL60 64,02+ 18 High Woods, nr. Mill Green, on rotting tree stump among Sphagnum. 1962 Eric Saunders.
TL81 84,13+ 19 Wickham Bishops, Chantrey Wood, on rotting wood by stream.  1963. Eric Saunders. (Herb.KJA).