MOSSES WITH A HAND-LENS XV 



PAGE 



Seta dark red-brown Ceratodon. 40 



33. Leaves like those of Dicranum longi folium (see 



plate XI); seta arched in the middle; cap- 

 sule without neck, pendent ; peristome single 

 Dicranodontium longirostre. 48 



Leaves lanceolate ; seta bent at the top ; capsule 



long-necked Leptobryum. 102 



Leaves lanceolate; capsule with short neck.... 



Pohlia nutans. 100 



Leaves broadly ovate-lanceolate to ovate 



Mnium and Bryum. 103 



34. Leaves without costa 35. 



Leaves costate 36. 



35. Leaves acute, white tipped ; capsules entirely im- 



mersed, subglobose, opening by a lid. .Hedwigia. 52 

 Leaves obtuse, without white tips ; capsule split- 

 ting into 4 valves Andreaea petropliila. 15 



36. Leaves crisped when dry, never white tipped. . . . 



Ptychomitrium. 53 



Leaves not crisped, often white tipped 



Grimmia and Rhacomitrium. 55-59 



Leaves not crisped ; capsule splitting into four 



valves Andreaea. 15 



B. 



1. Growing on stones in or near running water. ... 2. 



Not growing in water 4. 



Growing on the stems of partially submerged 



bushes Dichelyma. 146 



2. Long and floating (Fissidcns Julianus may be 



sought here) Fontinalis. 146 



Not long and floating 3. 



3. Leaves without costa Hypnuui. 115 



Leaves costate - 



Rhynchostegium rusci forme, Brachythecinin, 

 Amblystegium, Hypnum ochraceum. 



4. Leaves two-ranked or appearing so, flattened 



into one plane 5. 



Leaves not lying in one plane 7. 



5. Leaves without costa 6. 



