— 74 — 



Branches often curved; branchlets longer with smaller narrower 

 leaves. Tufts dense glossy green. — On rotten wood r. Amer. 

 Can.: Macoun; Moser. 

 20.P.pa88aicense Austin. 



Leaves ovate-oblong short-acuminate einuolate at acumen, 

 nearly crowded, shorter than in the both last; lowest basal 

 cells dilated, alar distinct, the others linear or linear-lanceolate. 

 Capsule very small suboblong oblique or slightly curved, annu- 

 late; teeth pale; pedicel not long. Tufts green. — Logs in 

 swamps r. Amer. Can.: Macoun. 



b. Costa of leaves sometimes simple but very thin, reaching 

 to middle. Monoecious. 



21.P.geminum Mitten. — Stereodon Mitt.; Plagiothecium 

 Kindb. 



Leaves distant ovate-oblong short-acuminate nearly entire or 

 slightly denticulate at acumen or below it; alar cells few us. 

 distinct, the others linear. Capsule subcylindric nearly straight; 

 pedicel short. — Rocks r. Amer. Can.: Macoun; Waghorne. 



IV. Pseud-Isopterygium Kindb. 

 22.P.pulchellnni Hedwig. — Leskea H ; Plagiothecium Br. eur. 



Leaves entire ovate-oblong or broadly ovate-lanceolate, gradually 

 tapering to a gen. short point; cells lanceolate-linear, alar not 

 distinct. Capsule subcj'lindric often straight erect, annulate; 

 lid apiculate or rostellate; pedicel sometimes long. Stem short. 

 Tufts dense green. Leaves gen. smaller than in P. nitidulum 

 and nearly crowded. — ■ Rocks and their crevices princ. in alps. 

 Eur. not r. Sweden and Norway common in alps! Switzerl.!; 

 Schimper- Amer. Can.; Macoun; Waghorne. Greenl.: Berggren. 

 23.P.Bottinii Breidler. 



Leaves larger than in the last, slightly denticulate at acumen, 

 ovate-oblong or ovate-lanceolate gen. abruptly narrowed to a 

 long filiform-pointed acumen; basal cells dilated, alar subqua- 

 drate not much wider, the others sublinear. Capsule small 

 subc3'lindric or suboblong vsdthout distinct neck, oblique or 

 curved; lid obtuse; pedicel long subcapillary; annulus not seen. 

 Stem long. Tufts loose green or yellowish. — Peat-bogs r. 

 Eur. Italy: A. Bottini. 



62. Stereophyllnm Mitten. 

 1 .S.Wrightii Sullivant. — Hypnum (Omalia) SuU. ic. muse; 

 ^Stereophyllum Mitt.»: C. M. 



Leaves distant ovate-oblong or sublinear-oblong gen. obtusate, 

 faintly denticulate above, infiexed below at one side, not large; 



