MOSSES WITH A HAND-LENS 



PAGE 



Plants of moist banks ; leaves not crisped 



.Dicranella. 41 



22. Plants greenish-white Leucobryum. 50 



Plants dark to light-green, not white 23. 



23. Leaves two-ranked ; plants appearing flattened 



Fissidens. 30 



Leaves not two-ranked, arising from all sides 

 of the stem 24. 



24. Capsules smooth when dry 25. 



Capsules furrowed or wrinkled when dry 28. 



25. Capsules with a long slender neck. .. .Trematodon. 40 

 Capsules with neck short or wanting 26. 



26. Plants in habit, peristome, and calyptra like the 



hair-caps Pogonatum alpinum. 25 



Calyptra not hairy; peristome of 16 teeth 27. 



27. Peristome double ; dry capsules usually with a 



short neck (long in Pohlia elongata) 



Bryum and Pohlia. 97 



Peristome single ; capsules without neck, not 



strumose Dicranum. 45 



Peristome single; capsule plainly strumose.... 



Oncophorus. 39 



28. Capsules subglobose when wet 



Philonotis and Bartramia. 94 



Capsules elongated, often subcylindric 29. 



29. Growing on rotten wood Dicranum. 45 



Growing on soil or bases of trees 30. 



30. Growing in swamps or very wet places ; per- 



istome double Aulacomnium palustre. 92 



Growing in barren places, roadsides, paths, etc. ; 



peristome various 31. 



Growing on soil, base of trees, or rocks ; per- 

 istome single Dicranella. 41 



Growing most commonly at base of trees in 



woods ; peristome double 



Aulacomnium hcterostichum. 94 



31. Capsules strongly curved, mouth at one side 



t . . . . Punaria. 89 



Capsules inclined, only slightly unsymmetric. . . .32. 



32. Seta yellow Ditrichum pallidum. 38 



