Branches often curved; branchlets longer with smaller narro 
leaves. Tufts dense glossy green. — On rotten wood r, Amer. 
Can.: Macoun; Moser. 
20.P.passaicense Austin. | 
Leaves ovate-oblong short-acuminate sinuolate at acume 
nearly crowded, shorter than in the both last; lowest basal 
cells dilated, alar distinct, the others linear or linear-lanceola 
Capsule very small suboblong oblique or slightly curved, ann 
late; teeth pale; pedicel not long. Tufts green. — Logs 4 
swamps r. Amer. Can.: Macoun. . : 
b. Costa of leaves sometimes simple but very thin, reaching 
to middle. Monoecious. 
21.P.geminum Mitten. — Stereodon Mitt; Plagiotheciu 
Kindb. 9 
Leaves distant ovate-oblong short-acuminate nearly entire C 
slightly denticulate at acumen or below it; alar cells few us. 
distinct, the others linear. Capsule subcylindric nearly straigh 
pedicel short. — Rocks r. Amer. Can.: Macoun; Waghorne. ` 
IV. Pseud-Isopterygium Kindb. : 
22.P.pulchelium Hedwig. — Leskea H ; Plagiothecium Br. eur 
Leaves entire ovate-oblong or broadly ovate-lanceolate, graduall 
tapering. to a gen. short point; cells lanceolate-linear, alar not 
distinct. Capsule subcylindric 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 prine. in al 
Eur. not r. Sweden and Norway common in alps! Switzerl. 
Schimper. Amer. Can.: Macoun; Waghorne.  Greenl. Berggren. 
23.P.Bottinii Breidler. d i : 
Leaves larger than in the last, slightly denticulate at acum 
ovate-oblong or ovate-lanceolate gen. abruptly narrowed to 
long filiform-pointed acumen; basal cells dilated, alar subqua 
drate not much wider, the others sublinear. Capsule small 
subcylindric or suboblong without distinct neck, oblique 
curved; lid obtuse; pedicel long subcapillary; annulus not seen. 
Stem long. Tufts loose green or vellowish. — Peat-bogs 
Eur, Italy: A, Bottini. TII 
52. Stereophyllum Mitten. 2 
1.8.Wrightii Sullivant. — Hypnum (Omalia) Sull. ic. mus 
»Stereophyllum Mitt»: €. M. fee . 
Leaves distant ovate-oblong or sublinear- it 
faintly denticulate above, inflexed. 
below at one side, not large: 
