5 — 



Fig. 2. Hylocomium triquetrum x i; stem leaf x 4. 



4. H. sguarrosum (L. ) B. & S. has a more feathery look than H.pari- 

 etimftn, the leaves being thinner and more spreading (squarrose) on the 

 stems, which are usually red, as are also those of parietinum and pro- 

 liferu7n. The apices of the leaves are long and slender and reflexed. The 



k^ 



Fig. 3. On the left leaves of H. squai-rosinn y. 5: branch x 4: alar cells 

 highly magnified. On the right leaves of H. iyiquctrum x 5; alar cells 

 highly magnified showing pitted cell walls. 



alar cells are somewhat larger and clearer, but are not inflated. The cells 

 in this species are papillose, and the papillae are from the end walls of the 



