typical. uliginosum. perigoniale. minus. 



Fig. 23. Polytrichum commune and varieties. 



1 = Dry plants, X i. (The typical plant often has more erect leaves.) 2 = Tip 



of plant showing perichatial leaves and capsule, X i. 3 = Capsules, X 5. 4 = Pores 



from surface of capsule; the arrows point up in capsule, X 365. 5 = Cross sections 



of a few lamellcc showing their height, and depth of notching of apical cell, X 250. 



