POLYTRICHACE^E.] 60 [Polytrichum. 



elegant coat of long hairs is produced with great rapidity, and chiefly from 

 the apex of the organ. The capsule shows small stomata in the cuticle above 

 the hypophysis, and on section we observe the corrugated spore sac, 

 suspended externally from the lining of the capsule and internally from the 

 columella by numerous delicate cellular threads. 



In addition to the description of the epiphragm already given, it may be 

 mentioned that in P. attenuatum, gracile and sexangulare, there is also a thick 

 intramarginal ring beneath. 



TAB. V. 



A. Catharinea angustata. 



a. female plant (Doune, McKinlay). b. male plant (Hurst, Mitten). 



B. Catharinea undulata. 



a. typical form (Abbey wood, Braithwaite'). ft. var. minor (Ashton, Hunt). 



C. Catharinea crispa. 



a. female plant (New Jersey, James), b. male plant (Hebden bridge, Hobkirk). ft. var. 

 densifolia $ (Oakmere, Wilson). 



D. Oligotrichum incurvum. 



a. b. female and male plant (Ben Lawers, Braithwaite). 



TAB. VI. 



A. Polytrichum subrotundum. 



a. b. female and male plant (Virginia water, C. F. White), ft. var. longisetiim (Ditto). 



B. Polytrichum aloides. 



a. b. female and male plant (Wimbledon, Braithwaite). ft. var. Dicksoni (Strome ferry, 

 Hunt). 



C. Polytrichum urnigerum. 



a. b. female and male plant (Bowdon, Hunt), ft. var. humile (Aislaby, Braithwaite). 



D. Polytrichum alpinum. 



a. b. female and male plant (Ben Ledi, Braithwaite). 



TAB. VII. 



A. Polytrichum sexangulare. 



a. b. female and male plant (Glen Callater, Hunt). 



B. Polytrichum gracile. 



a. b. female and male plant (Hale moss, Wilson). 



C. Polytrichum attenuatum. 



a. b. female and male plant (Rigg mill, Whitby, Braithwaite). 



