OF WESTERX PEXXSYLVAXIA 291 



1. Campylium hispidulum (Bridel) Mitten. 



(Hypnum hispidulum Bridel; Chrysohypnum hispidulum Roth; 

 Stercodou hispidulus Mitten; Amblystegium hispidulum 

 Kindberg ) . 



(Plate XLI ) 



Slender, interlaced in bright green tufts more or less yel- 

 lowish below ; stems creeping, radicnlose, abundantly but ir- 

 resrularlv branching:, the branchlets slender and erect or 



^"^ ' t^ 



ascending; leaves widely spreading to distinctly squarrose, 

 about 0.5-0.8 mm. long, triangular-cordate, abruptly acumi- 

 nate, the slender acumen about one-third to one-half as long 

 as the main body of the leaf, the leaf slightly concave, decur- 

 rent. sub-serrulate all around, excavate at the base ; costa 

 double and very short, or none; median leaf-cells about 3-6:1. 

 about .005-. 006 mm. wide, prosenchymatous, elongate-oblong 

 with blunt ends, the alar numerous, sub-rectangular to 

 quadrate, granulose, up to twice as wide as the median cells : 

 seta pale castaneous to yellow, about 1.5 cm. long, slender 

 dextrorse ; capsule small, oblong, more or less incurved, yel- 

 lowish-brown, wide-mouthed, the urn about 1.2-1.4 mm. long, 

 when dry furrowed and narrowed below the mouth ; annulus 

 uni-seriate : lid convex-conic with an upturned apiculation ; 

 peristome normally hypnoid, the segments slightly cleft and 

 almost equalled in length by the nodose to sub-appendiculate 

 cilia ; spores mature in summer, yellowish, medium- walled, 

 minutely papillose, about .011-.014 mm. 



On the bases and roots of trees, on decaying wood, on 

 humus, etc., always near the ground in moist shaded places; 

 in Europe, Asia. and. in Xorth America, from North Carolina 

 and Missouri to Canada. Common in our region. 



Allegheny : Moon Township. April. 1902. J. A. S. ; 



Coraopolis, September 4. 1905. O. E. J. 

 and G. E. K. 



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



Center : Eck r e of pond at Scotia. September 20. 



L909. O. E. J. (Figured). 



Erie ; Presque Isle! June 9-11. 1905. O. E. J. 



Indiana : T. P. James. (Porter's Catalogue >. 



Fayette : Ohio Pyle. September 1-3. 1906. O. E. J. 



and (T. K. J. 



McKean : Quintuple Ridge. November 26, 1896, 



Bolivar Run, December 15. 1896, Septem- 

 ber 24. 1896, Lan'^made Hollow, all near 

 Bradford. D. A. B. 



