OF WESTERN PENNSYLVANIA 293 



3. Campylium polygamum (Schimper) Bryhn. 

 {Hypnuin polygamum Wilson; Chrysohypmiin polygamum 

 Loeske). 



(Plate XLII) 



Moderately robust, yellowish-green to golden, low, cespi- 

 tose: stems erect to ascending, about 3-6 cm. long, divided 

 and with rather numerous, irregularly pinnate, rather crowded, 

 and erect or ascending branchlets ; stem-leaves lance-ovate, 

 2-2.5 mm. long, moderately close, erect-spreading both wet 

 and dry, with an ovate or oblong base narrowed above into a 

 long, gradually tapering, channeled acumination, entire, the 

 base rounded and clasping, somewhat decurrent ; branch-leaves 

 elongate-lanceolate, with the sides tapering in a straight line 

 from the rounded-ovate base, the leaves averaging about 3 

 mm. long; median leaf-cells narrowly linear, about 8-12:1, in 

 the older leaves somewhat incrassate, towards the base often 

 porose, the alar sub-rectangular, somewhat enlarged, distinct, 

 forming often orange-pellucid auricles ; costa not very strong 

 but distinct and usually reaching somewhat above the middle 

 of the leaf : seta slender, flexuous, about 3-4 cm. long ; capsule 

 oblong-cylindric, curved ; peristome normally hypnoid, cilia 

 well developed ; annulus present ; spores mature in summer. 



In moist places in meadows and swamps and said to pre- 

 fer sandy soils ; Europe, Asia, and from Arctic North America 

 to the northern United States. Rare in our region. 



Allegheny : Schenley Park, Pittsburgh, August 26, 



1906. O.E.J. (?). 



Crawford : Near Linesville in the Pymatuning 



Swamp, May 10-11, 1906. O. E. J. (Fig- 

 ured). 



4. Campylium stellatum [Schreber] Lange and C. Jensen. 

 (Hypmim stellatum Schreber; Chrysohypnum stellatum Loeske; 

 Amblystegmm stellatum Lindberg). 



(Plate XLII) 

 Robust, densely tufted, soft, lustrous, bright to golden 

 green : stems stout, usually ascending, up to 8 or 10 cm. long, 

 irregularly divided, the branchlets sub-pinnate and more or 

 less crowded and erect ; leaves close, from 1-3 mm. long, from 

 an erect-spreading and more or less cordate base narrowed, 

 often rather abruptly, to a gradually long-acuminate, acute, 

 squarrosely spreading acumen, the base entire or sometimes 

 slightly denticulate, slightly excavate and with rounded and 

 sub-decurrent auricles, the upper part of the leaf more or less 

 channeled; costa very short, either single, forked, or double, 

 but usually appearing only as yellowish or brownish striae; 

 median leaf-cells narrowly linear, about 8-15:1, in the older 



