MOSSES WITH A HAND-tENS 



PAGE 



Capsules gymnostomous, leaf-cells large, clear 



Physcomitrium in Punariaccac. go 



Capsules peristomate I3 



13. Capsules with a large swollen hypophysis, which , 



is usually larger and more conspicuous than 

 the spore-bearing part ; leaves not papillose ; 

 growing on decaying animal rmttevSplachnaceae. 88 



Capsules without hypophysis (some with slender 

 necks ) . I4- 



14. Capsules strongly plicate when dry and empty, 



often strongly unsymmetric 15. 



Capsules not plicate or striate when dry or only 

 very slightly so 18. 



15. Peristome single Dicranaceae. 34 



Peristome double 16. 



16. Capsules subglobose ; inner peristome without 



cilia, or cilia very small Bartramiaccae. 94 



Capsules elongated, cilia well developed 17. 



17. Capsules strongly unsymmetric with the mouth 



nearly on one side ; segments opposite the 



teeth. Punariaceae. 89 



Capsules only slightly vmsymmetric ; segments 



alternating with the teeth Aulacomniaceae. 92 



18. Capsules subpendent to pendent ; peristome 



double Bryaccae. 96 



Capsules often imsymmetric or inclined, but 

 never subpendent; peristome single, teeth 

 usually forked or twisted or both ig. 



19. Leaves nearly always crisped when dry; per- 



istome in most cases of filiform twisted teeth. 



Tortulaceae. 63 



Leaves rarely crisped ; peristome of 16 reddish 



forked teeth which are never twisted 



Dicrtmaceae. 34 



20. Aquatic, long and floating, with leaves straight ; 



or plants shorter with falcate-secund leaves 

 and often only partially submerged ; capsules 

 immersed or emergent, never exserted. . . : 

 Pontinalaceae. 146 



