a- TU — 
point, narrowly recurved below middle at one side; alar cel 
few often large, the others oblong-lanceolate. Capsule suboblong 
oblique not curved; lid apiculate. Tufts dense glossy green. 
Branches few short not attenuate, Monoecious. Resembles 
small state of P. Roesei. — Amer. r. Can.: Macoun. 
12.P.attenuatirameum Kindb. cat. Canad. m. 
Lower leaves broadly ovate obtuse or obtusate, recurved 
above middle at least at one side; lower basal cells dilat 
nearly uniform, the others oblong lanceolate; costa sometimes 
simple and reaching to middle. Other leaves gradually smalle 
upwards, narrower, more acute or acuminate. Branches lon 
attenuate flagelliform above. Tufts loose faintly shining. Cap- 
sules unknown. — Rocks r. Amer. Can.: Macoun. i 
IIL Isopterygium Mitten. ' 
A. Leaves distinctly denticulate, not recurved. Capsule : 
annulate. no 
a. Leaves denticulate nearly all around; alar cells gen. distinct. 
Monoecious, us. fruiting. Es 
13.P.silesiacum Seliger. -- Hypnum Sel.; Plagiothecium Br. eur 
Leaves ovate-lanceolate long-cuspidate crowded; cells narrow 
linear exe, the alar. Capsule somewhat large subcylindri 
arcuate not striate; teeth pale; lid obtuse; pedicel long. Tufts ] 
green. Branches us. curved deflexed. — On logs in woods, I 
on rocks. Ewr. not r. Sweden common, Norway, Switzerl.! 
Amer. r. U. S. near Washington: Roell. is 
14.P.turfaceum Lindberg; Sulliv. icon. m. ne 
Differs from the last: Leaves smaller shorter and less crow 
ded, narrowly ovate-oblong shorter-cuspidate; cells linear-lanceo- 
late. Capsule smaller, narrowly ovate-oblong, striate when dry; 
pedicel less long. Tufts bright green. Branches us. not cul 
ved. — Turfy soil and rocks. Eur. r. Sweden!; S. O. Lindberg: 
Amer. not r. princ. in eastern distr: Macoun; Moser; Waghorne. 
* P.pseudo-silesiacum Sehimper. ) 
»Lower leaves oval narrowly acuminate spreading, the upper 
appressed: — Aimer, U. S. r.»: Lesq;-ét Jam. t 
b. Leaves distantly denticulate in upper third; cells linear, 
alar not distinct. Dioecious very r. fruiting. d 
15.P.elegans Hooker. — Hypnum Hook.; Plagiothecium Schi 
per; Sulliv. icon. musc. e. 
Leaves ovate-lanceolate short-cuspidate often somewhat large 
Capsule small obovate or oblon » not or slightly curved; teeth 
pale; segments. entire; cilia long not appendiculate; lid acute 
