OF WESTERN PENNSYLVANIA 347 



about 1.5-2.5 mm. long, spoon-shaped, abruptly acuminate, the 

 acumination filiform and twisted, the leaves oblong-ovate, 

 scarious, shining; costa double and short, or simple and reach- 

 ing to the leaf-middle; median leaf-cells narrowly linear- 

 rhomboid, the marginal shorter and mainly rhomboid, the basal 

 short, wide, yellowish-brown, pellucid, irregularly oblong to 

 rectangular, larger but shorter, the alar incrassate, quadrate, 

 forming an indistinct group, the apical shorter and wider than 

 the median,, the median about 6-10:1; perichaetial leaves nar- 

 rowly long-acuminate, the inner erect: seta smooth; capsule 

 oblong, about 2.5-3 :1, the urn about 2 mm. long, inclined, sub- 

 arcuate; lid sharply obliquely rostrate, about 1 mm. long; 

 annulus present; peristome normally hypnoid with somewhat 

 split segments and cilia 3, about as long as segments ; spores 

 mature in fall. 



On earth or rocks in moist woods, often at the edges of 

 the woods, or even in the fields ; from New England to Florida 

 and westward to Colorado. Probably fairly common in our 

 region. 



Cambria : (Porter's Catalogue). 



Huntingdon : Pennsylvania Furnace, July 13, 1909. 

 O. E. J. 



Washington : Linn and Simonton. (Porter's Catalogue). 



Westmoreland: Hillside, May 22, 1909. O. E. J. (Fig- 

 ured). 



5. OXYRHYNCHIUM (Bryologia Europsea) Warnstorf. 



Mostly dioicous : slender to robust, laxly to densely 

 cespitose, dark to yellowish-green, drying soft or stiff, dull to 

 lustrous : stem creeping or ascending, often stolon-like, often 

 bearing rhizoids, irregularly pinnate to fasciculately branched ; 

 branches mostly complanate-leaved, stem-leaves and branch- 

 leaves sometimes different, sometimes similar except in size, 

 non-plicate, but little concave; stem-leaves erect-spreading to 

 squarrose, from a somewhat narrowed and sometimes decur- 

 rent base ovate to triangularly oval, with short and broad or 

 somewhat longer apex, plane-margined, somewhat serrate; 

 costa simple, ending at or above the leaf-middle, often ending 

 in a dorsal spine; median leaf-cells narrowly prosenchymatous, 

 smooth, the basal shorter, mostly incrassate and porose, the 

 alar differentiated: seta elongated, mostly red, quite thick, 

 mostly rough ; capsule cernuous to horizontal, sometimes sub- 

 erect, thickly oval to oblong-ovate, dorsally gibbous; annulus 

 present; peristome as in Brachythecium ; lid long and obliquely, 

 subulate-rostrate; calyptra glabrous. 



A genus of about 30 species, on damp and shaded rocks, 

 stones, or sometimes in water, mostly in temperate regions ; 

 4 species in North America; 2 species in our region. 



