21 
crisped when dry; cells mostly round-oval, less often sub- 
oblong, seldom narrower. Paraphyllia sometimes wanting. 
Fam. 13. Hypnacee. 
A. Capsule generally symmetric and erect, not 
curved. 
I. Pylaisiece. Leaves neither distichous nor falcate ; 
angular or alar cells subquadrate; costa short and double 
or indistinct. Endostomial segments sometimes partly con- 
nate with the teeth; annulus mostly indistinct. Pedicel 
of the capsule smooth. Monoecious. 
46. Pylaisia. Endostomial segments reaching above 
the teeth. Lid of the capsule not rostrate. Alar (angular) 
leaf-cells small, usually green. 
47. Pylaisiella (new genus). Endostomial segments 
lower than the teeth. Lid of the capsule rostrate. Spe- 
cial alar cells sometimes large and pellucid. 
B. Capsule generally asymmetric and inclined or 
curved. 
chous, often incurved or subfaleate, acute, generally acu- 
minate, mostly recurved at the borders; alar cells vesiculi- 
form and rotundate, orange or hyaline; inner cells generally 
narrow. Capsule usually small; lid rostrate ; pedicel smooth. 
48. Raphidostegium. Leaves usually small; costa 
mostly indistinct. Stem without paraphyllia. 
Ill. Plagiotheciece. Leaves generally distichous or 
subdistichous by the complanate branches, not curved, 
seldom recurved at the borders; alar cells polygonal or 
indistinct; inner cells generally narrow. Lid of the cap- 
sule sometimes rostrate; pedicel usually smooth. Stem 
Sometimes (in some species of ak Mpeg nct with : 
 paraphyllia. ; 
a. Leaves vaamifose above. 
49. Rhynchostegium. Leaves —M dia acute; 
II. Raphidostegiew. Leaves not rarely subdisti- 
cells not seriate; costa often simple. Lid of the capsule - 
usually rostrate. Stem often. with. ar 
