398 
IV. MUSCI. 
Division 3. Diploperistomt. — Peristome double. 
* Calyptra cucullate. 
a. leaves strongly distichous , tristichous or bifarious. 
f Fruitstalk very short. 
Leaves distichous, oblique, broad, shining. Capsule erect . . .59. Neckera. 
ft Fruitstalk moderate or long. 
Leaves distichous, not oblique, serrate. Capsule erect .... 60. Trachyloma. 
Stems prostrate or creeping. Leaves distichous. Capsule ceruuous 
or horizontal 64. Omalia. 
Stems erect, hardly branched. Leaves distichous, strongly serrate. 
Fruitstalk from the base of the stem. Capsule inclined . . . 65. Rhizogonium. 
Stems dendroid, much branched. Leaves tristichous. Capsule 
suberect, ceruuous or pendulous 67. Hypopterygium . 
Stems creeping or prostrate. Leaves distichous, piliferous, nerveless. 
Capsule cernuous 63. Hypnum. 
/8. Leaves imbricate all round the stem , secund or pointing every way , rarely obscurely 
distichous or bifarious. 
+ Fruitstalk very short. 
Stem erect. Capsule not furrowed. Leaves with a stout nerve . 56. Cyrtopus. 
Rhizome creeping. Capsule erect, furrowed. Leaves nerveless or 
2-nerved 53. Cladomnion. 
Rhizome creeping. Stems pendulous, very loug (erect in M. nitens). 
Leaves shining, membranous, concave. Capsule erect . . .54. Meteoriuh. 
ft Fruitstalk moderate or long. 
Habit dendroid. Stems naked below, above pinnately or verticillately 
branched. Capsule erect, or inclined by the curvature of the 
fruitstalk 61. Isothecium. 
Stems creeping or prostrate, pinnately or vaguely branched. 
Capsule curved, horizontal, or pendulous, not furrowed. Calyptra 
glabrous 63. Hypnum. 
Stem compressed, pinnately branched. Capsule erect, straight, 
cylindric. Leaves entire, nerves 0, or 2, and short .... 62. Entodon. 
Stems erect, simple. Leaves strongly serrate. Fruitstalk from 
the bases of the stems. Capsule inclined 65. Rhizogonium. 
Stem creeping, branched. Leaves piliferous. Capsule curved, 
furrowed, cernuous. Calyptra hairy 70. Racopilum. 
Calyptra mitriform. 
a. Fruitstalk very short. 
Stem erect or pendulous, branched. Leaves imbricate all round 
the stem. Capsule erect, sunk in the perichactial leaves . . .55. Cryph^a. 
Stem erect, unbranched. Leaves tristichous, dorsal small. Capsule 
erect, almost sessile 68. Cyathophorum. 
0. Fruitstalk moderate or long. 
Stems creeping, branched. Leaves obscurely tristichous, piliferous. 
Capsule curved, grooved. Calyptra hairy 70. Racopilum. 
Stems dendroid. Leaves tristichous, dorsal smaller. Capsule sub- 
erect cernuous or pendulous 67. Hypopterygium. 
Stems suberect or creeping. Leaves more or less distichous ; cells 
large, lax. Capsule cernuous. Teeth with transverse bars . . 71. Hookeria. 
Stems erect, tufted. Leaves imbricate all round. Capsule erect . 72. Daltonia. 
