Fig. 11. Polytrichadelphus lyallii. 



1 = Plant moist, with capsules, X i. 2 = Plant dry, Xi. 3 = Capsule, showing 

 double fold. 4 = Capsule, X 5. 5 = Cross section of capsule near base, X 10. 

 6 = Cross section of capsule near mouth, X 10. 7 = Calyptra. 8 = Hair of calyp- 

 tra. 9 = Peristome. 10 = Leaf. 11 = Leaf, X 15. 12 = Leaf tip, X 65. 13 = 

 Cross section of leaf. 14 = Cross section of a few lamellae, X 250. (Nos. 3, 7, 8, 9, 

 10, 13, after Sullivant.) 



