MOSSES WITH A HAND-tENS 



53 



only indication of their presence is a slight enlargement of the 

 ends of some of the branches. The capsules are almost spherical, 

 with a clear-cut lid and no peristome ; they mature in spring. 

 An attempt has been made to illustrate the remarkable trans- 



If 



H"i- If i¥ 



mm r 



J 



FiGORil 23. Hedwigia albicans, a, X i, dry and wet. b, Capsule with 

 a portion of the perichzetial leaves removed X 10. c. Branches, dry and wet 

 X 5- d, I^eaves X 10. 



formation that these plants undergo when moistened, but no 

 drawing can do justice to the magic of the change. 



PTYCHOMITRIUM. 



This genus is rare in most parts of our range and only one 

 species is likely to be found. 



P. INCURVUM (Schwaegr.) SuUiv. The plants of this 

 species are about % inch in height (J4 inch with fruit) and 



