Analytic Key to the Genera of Mosses. 
Not papillose. 
Annulus large,compound.Crypheea, 275. 
Annulus none, leaf-cells minute, obscure . Neckera, 281. 
Annulus none, leaf-cells large, distinct Anacamptodon, 296. 
Cells linear or vermicular. 
Annulus none.Neckera, 281. 
Annulus present.Antitrichia, 290. 
[Cylindrotliecium, with leaves obscurely costate, may be sought here.] 
Leaves ecostate. 
Annulus none.Neckera, 281. 
Annulus present. 
Leaf-cells quadrate at basal angles . . Cylindrotliecium, 310. 
Leaf-cells not quadrate at basal angles . . Orthotliecium, 315. 
* * * Segments distinctly keeled , often broad. 
Capsule symmetric , erect. 
[Species of Hypnum with erect or sub-erect capsules will be sought here.] 
Leaves papillose. 
Plants large, branches erect, dendroid .... Alsia, 279. 
Plants long, pendent from trees, branches filiform Meteorium, 286. 
Plants small, branches erect, julaceous . . Myurella, 300. 
Leaves not papillose. 
Leaves costate or ecostate, complanate, pseudo-dis¬ 
tichous . Homalia, 285. 
Leaves ecostate, annulus large (none in Cyl. Drummondii). 
Cells quadrate at basal angles. 
Teeth hyaline margined .... Platygyriiim, 307. 
Teeth not hyaline margined . . Cylindrotliecium, 310. 
Cells not quadrate at basal angles . . Orthotliecium, 315. 
Leaves ecostate, annulus small, narrow . . . Pylaissea, 308. 
Leaves costate, plants dendroid .... Climacium, 313. 
—*— Capsule unsymmetric, often arcuate. 
Leaf-cells large, calyptra mitrate. 
Leaves mucronate or acute or acuminate . . Hookeria, 292. 
Leaves obtuse.Pterigophyllum, 298. 
Leaf-cells small, calyptra cucullate .... Hypnum, 316. 
[Climacium Ruthenicum will be sought here.] 
63 . 
64 . 
64 . 
65 . 
64 . 
67 . 
68 . 
64 . 
65 . 
66 . 
65 . 
67 . 
68 . 
67 . 
68 . 
65 . 
68 . 
