OF WESTERN PENNSYLVANIA 309 



1907; "Shades," near Blackburn, March 

 25, 1910. O. E. J. and G. K. J. 



4. Stereodon cupressiformis [Linnaeus] Lindberg. 



(Hypmuii cupressiformis Linnaeus; H. coinprgssuui Schultz). 



Widely cespitose in flat, soft tufts, usually yellowish or 

 brownish-green : stems up to 10 cm. long, greenish, procum- 

 bent, irregularly pinnate, the branches spreading or ascending, 

 usually curved ; leaves closely imbricate, concave at the base, 

 slightly decurrent, falcate-secund, lustrous, oblong- to ovate- 

 lanceolate, narrowed rather abruptly to a long acumination, 

 plane-margined, typically entire, sometimes denticulate/ to- 

 wards the apex ; costa none or very short and double ; median 

 leaf-cells about 10-15:1, linear-vermicular, rather obtuse, the 

 angular sub-quadrate, numerous, rather opaque, a few at the 

 extreme angles larger, scarcely inflated, orange-pellucid, or 

 hyaline, rather incrassate, the auricles not well-defined ; peri- 

 chaetial leaves denticulate, not plicate : seta red, about 3-4 cm. 

 long; capsule sub-erect, curved, sub-cylindric or oblong, cast- 

 taneous, somewhat constricted below the mouth when dry ; 

 lid convex at base, with an acuminate apex ; peristome normal- 

 ly hypnoid; cilia usually one or two; spores mature in late 

 autumn or early winter. 



On rocks, roots, and bases of trees, in moist woods or 

 ravines; practically cosmopolitan,— in North America occur- 

 ring from the Arctic regions to the Gulf States. Rare in our 

 region. 



Cambria : T. P. James. (Porter's Catalogue). 



McKean : Three pockets so-labeled in the Carnegie 



Museum Herbarium are apparently typical 

 S. fcrfilis and the Porter Catalogue record is 

 probably founded upon some of the same 

 Burnett collections. 



4a. Stiereodon cupressiformis variety filiformis (B ridel) New 



Combination. 



(Hypnum cuprcssiforme var. filifortne Bridal). 



(Plate XLVI) 



More slender, distantly pinnate, the branches long, very 

 slender and almost filiform ; leaves very small, falcate-secund, 

 more or less regularly and neatly imbricated in two rows. 

 Habitat and range as for the species. Rare in our region. 

 McKean : Rutherford Rocks, on moist and densely 



shaded fragments of sandstone at base 

 of cliflf, May 5, 1895, and Hawkin's Hol- 

 low, August 2, 1895. D. A. B. (Figured). 



