168 BULLETIN OF THE UNIVERSITY OF WISCONSIN. 



++ ++ Leaves not papillose. 



Leaves costate or ecostate, complanate, pseudo-distichous. 

 — «. Middle leaf -cells linear, cilia none or very short Homalia, 285. 22 7» 



Middle leaf-cells rhomboidal, cilia solitary, % length 



of the segments .... Stereopliyllum,i 411_ 



.JJeaves costate, plants dendroid .... Climaciam, 313. 231. 

 Leaves ecostate, annulus large (none in Cyl. Drummondii). 

 Cells quadrate at basal angles. 

 Teeth hyaline margined .... Platygyrium, 307. 

 'Teeth not hyaline margined . Cjlindrothecinm, 310. 231.. 



Cells not quadrate at basal angles . Orthothecium, 315. 232, 



— Leaves ecostate, annulus small, narrow . . . Pylaisaea, 308. 230.. 



-1- -1— Capsule unsymmetric, often arcuate. 

 «■ Leaf-cells large, calyptra mitrate. 



Leaves mucronate or acute or acuminate . . Hookeria, 292. 228. 

 Leaves obtuse Pterigophyllnm, 293. 



■M- +-f Leaf-cells small, calyptra cucullate. 



[Climacium liuthenicuTn will be soaght here.] 



1[ Leaf -cells short (1 : 3 or less). (% If on page 169.) 

 [Isotliecium Brewerianum may be soTight here.] 

 Leaves papillose. 

 Paraphyllia present. 

 Costa short or none or double . . Heterocladinm, 320. 232, 

 {PseudoleaJtea malacoclada will be songht here.] 



Costa strong. 



Capsule oval or oblong, lid convex-conic Pseadoleskea, 319. 232. 

 -—Capsule cylindric or if oval oblong then lid long 



rostrate Thuldinm, 321. 233. 



Paraphyllia none Claopodinm, 327. 234. 



Leaves not papillose. 

 Shortly bicostate. 

 Stem leaves filiform pointed . . . Heterocladinm, 320. 232. 

 Stem leaves not filiform pointed . . Tripterocladinm, 330. 234. 

 Unicostate or ecostate. 



[Tripterocladium rupestre will be sought here.] 



Plants dendroid, leaves coarsely serrate Thamninm, 361. 240. 



- Plants creeping, leaves entire or denticulate 



above Amblystegium, 371. 242. 



1 Stereophyllum WrightU E. and C. Eev. Bryol. 80: 23. 1893. (Sypnum WriglUU SnU. 

 L. and J. Man. 411.) 



