OF WESTERN PEXXSYLVAXJA 151 



oblong-pyriform, with a tapering" neck a little shorter than the 

 rest of the capsule, yellowish-brown, finally deep brown, when 

 dry and empty constricted below the deeper-colored mouth, 

 more or less pendulous; operculum wide, convex-mamillate ; 

 annulus wide, revoluble; peristome-teeth linear-triangular, 

 yellowish-pellucid below, sub-hyaline and papillose above, 

 >irongly trabeculate, lamellate, the zig-zag divisural usually 

 faint; basal membrane of inner peristome about half the length 

 of the teeth, the segments carinately split, hyaline and papil- 

 lose, a little shorter than the teeth, the three filiform ap- 

 pendiculate cilia somewhat shorter than the segments ; spores 

 yellowish-pellucid, minutely roughened, usually about .010- 

 .014 mm. ; exothecial cells irregularly quadrate to rectangular- 

 hexagonal, incrassate, three or four rows below the mouth be- 

 ing much smaller, rounded-quadrate and reddish-pellucid ; 

 synoicous : spores mature in summer. 



Allegheny : Sewickley, May 21, 1889, L A. S. ; Power's 



Run, May 4, 1905. O. E. L and G. E. K. ; 

 Stoop's Ferry, May 20, 1907. O. E. J. 

 and G. K. J. " 

 Erie : Presque Isle, May 8-9, 190(3. O. E. J. 



(Figured ). 



Favette : Laurelville. June 24, 1904. O. E. ]. 



Lawrence : Stop 78, S. and X. C. W. R. R., 1906. Miss 



Susan Gagebv ; Gorge below Ellwood 

 City, June 26,' 1909. O. E. J. 

 Somerset ; Ursina, May 12, 1905. O. E. J. 



Westmoreland; Derry, August 10, 1904. Miss Katherine 



R. Holmes; Hillside, May 19. 1906. O. 

 E. J. 



5. Bryum intermedium [Ludwig] Bridel. 



(Mninm intermedium Ludwig; IVebcra intermedia Schwaeg- 

 richen ) . 



(Plate XIX) 



Densely cespitose, green, matted with dark-colored 

 radicles ; stems short, laterally branching by innovations, erect 

 and with us usually about 3-5 mm. high ; leaves tufted at apex 

 of stem, erect-spreading, concave, oblong- to ovate-lanceolate, 

 the margins recurved, almost entire, base sometimes reddish, 

 only slightly decurrent, in our specimens about 1.5-2 mm. 

 long, the costa excurrent into a long entire or denticulate 

 acumen: leaf-cells rhomboidal above, thin-walled and rectangu- 

 lar at base, the marginal in one to three series of linear- 

 prosenchymatous cells forming a somewhat indistinct border, 

 sometimes the middle cells merely narrow gradually towards 

 the margin: seta in our specimens 1.5-3.0 cm. long, flexuous, 

 slender, lustrous, castaneous ; capsule about 3 mm. long, ellip- 



