120 A MANUAL OF MOSSES 



stricted below the mouth and very deeply 8-plicate, some- 

 what sinistrorse, reddish-brown ; peristome-teeth lighter in 

 color, granulose, with distinct divisurals, when dry closely re- 

 flexed, when moist erect; calyptra narrowly conic-mitrate, 

 non-hirsute and plicate; spores globose, somewhat papillose, 

 incrassate, about .017 mm. in diameter. 



On bark of living trees, often apple-trees; Europe, Asia, 

 northern Africa, and from Nova Scotia to Georgia and Iowa. 

 Scarce in our region. 



Allegheny : On base of Qucrciis iinbricaria in mixed 



pine and oak woods at Dutil Church, near 

 Douthett, December 29. 1908. O. E. J. 

 (Figured). 



McKean : Bradford. D. A. Burnett. (Porter's Cata- 



logue). 



4. Orthotrichum ohioense Sullivant. 



(O. canadense Sullivant, not Bryologia Europaea). 



(Plate XV) 



Densely cespitose, yellowish green above, dark or brown- 

 ish below : stems freely branching, about 6-10 mm. high ; 

 leaves lanceolate from an oblong base, about 1.5-3 mm. long, 

 spreading to ascending, bluntly acute to rounded-obtuse, papil- 

 lose with entire and revolute margins ; costa strong, ending 

 at a little below the apex; median leaf-cells quadrate to rec- 

 tangular, moderately incrassate, towards the margins and up- 

 wards becoming smaller, more incrassate, quadrate, sub-papil- 

 lose, the upper small, rounded, densely papillose, incrassate: 

 seta shorter than the urn ; capsule more or less completely im- 

 mersed, OAate-oblong when moist to somewhat narrower and 

 pyriform-campanulate when dry, symmetric, when dry 8- 

 striate, pale yellow, tapering at base, slightly constricted be- 

 low the mouth ; exothecial cells at mouth in one to three rows, 

 small, quadrate, below abruptly rounded and strongly incras- 

 sate, on the main body of the urn rectangular, and much 

 smaller; stomata immersed, the outer peristome of 8 double 

 teeth, yellowish-pellucid, densely punctulate, triangular-lanceo- 

 late, 5-7-articulate ; segments of inner peristome of 8 short, 

 linear-subulate segments of two rows of cells ; calyptra conic- 

 campanulate, yellowish, plicate, densely erect-hairy ; operculum 

 low-convex, apiculate-rostrate ; spores yellowish-brown, pel- 

 lucid, densely papillose, .018-.020 mm., mature in spring, — 

 about April : autoicous, antheridial clusters axillary. 



On bark of trees. New Brunswick to Ontario and south 

 to Georgia, also in Montana. Probably rather common in our 

 region. Ashtabula, Ohio, and as follows : 



