— 164 — 



* P.Swartzii Hartmnn. 



sLeaves short about 5 m. m. Capsule small subcubic with 

 less distinct apophysis. — Eur. r. Sweden*: Hartman skand. 

 flora. 

 26.P.COnorhynchuin Kindb. cat. Canad. m. 



DiSeiR from P. commune: Leaves channelled green, periche- 

 tial longer aristate. Lid of capsule with broadly conic beak. 

 — Bogs in alps r. Amer Can. Selkirk nits: Macoun. 



IV. Poiytricliadelphns Mitten. 

 ^T.P.Lyallii Mitten. — Polytrichadelphus Mitt.; Polytrichum 

 Kindb. revue bryol. 1894; Oligotrichum Lindb.; Sull. ic. mnsc. 



Leaves dentate above often to the middle of the prominent 

 lamina, not appressed; awn short smooth also in perichetial 

 leaves; lamellee about 30, their apical cell thick-walled suboval 

 smooth. Perichetial leaves suboonvolute densely lamellate at 

 the short point. Capsule subovoid-cylindric strangulate finally 

 brown; peristomial membrane elevate; lid long-rostrate; pedicel 

 yellowi.'^h. Resembling P. alpinnm and P. sexangulare. — Swampy 

 places in higher alp. region. Amer. Pacif. distr. r. U. S.iRoell; 

 Nowell. 



Fam. 18. GeopgiacesB. 



74. Geor:;ia Ehrhart. 



I. Tetraphis. Leaves diptiiiotly costate; upper cells round- 

 hexagonal. Peristomial teeth narrow. Stem elongate. 



II. Tetrodontinn!. Leaves not distinctly costate; upper 

 ceils suboval. Peristomial teeth broad. Stem nearly indistinct. 



I. Tetraphis Hedwig. 



A. Pedicel of capsule smooth. 

 l.G.pellucida L. — Mnium L.; Georgia Rabenhorst. 



Leaves subovate or suboblong, obtu.'^ate us. acute. Periche- 

 tial leaves with long sublinear u-. nhtu.=e acumen; cosla not 

 excurrent. Capsule and pedicel straight. Sterile stems gem- 

 miferous at the top, their bu'ls cup-shaped; upper stem leaves 

 very small. — Rotten logs, sandstone and turfy soil in woods. 

 Eur. common. Sweden, Switzerl.! Amer not r. Can.: Macoun; 

 Waghorne. U. S.: Roell. 

 2.G.CUspidata Kindb. revue bryol. 1893. 



Leaves Mibovate short-acuminate acute. Perichetial leaves 

 cuspidate by the long-oxcurrent costa. Caps^ule gen. curved; 

 pedicel straight. — Amer. Can.: Macoun. U. 8 : Sullivant and 

 Schrader, com. C. Mueller; Miss C. Cummings, com. Roell. 



