OF WESTERN PENNSYLVANIA 209 



On sticks and the bases of bushes in and around the edges 

 of slow streams and ponds ; Europe and from New Brunswick 

 and Ontario southward to Pennsylvania. Not yet recorded 

 as occurring within our region. 



2. Dichelyma pallescens Bryologia Europtea. 

 {Fontinalis capillacea Hooker). 

 (Plate XXXI) 

 Slender, light yellowish-green, sometimes glossy: stems 

 usually about 5-10 cm. long, the branching sub-distichous; 

 leaves secund, more or less falcate, the ends of the branches 

 and stems appearing hooked, leaves oblong-lanceolate, about 

 3-5 mm. long, gradually long-acuminate, complicate-carinate, 

 nearly entire; or denticulate above, plane-margined, acute to 

 obtuse; costa percurrent or nearly so; median leaf-cells rhom- 

 boid-linear, prosenchymatous, about 8-15:1, rather incrassate, 

 the basal colored and somewhat shorter, a few alar wider and 

 oblong, incrassate, the apical shorter ; perichaetial leaves about 

 as long or usually longer than the seta and capsule together: 

 seta about 4 mm. long, slender, enclosed in the perichaetium ; 

 capsule small, thin, ovate, yellowish, about 1 ijim. long, trun- 

 cate by the falling away of the lid; lid high-conic; peristome- 

 teeth linear, rather rudimentary, pale, castaneous-pellucid, 

 with distinct divisural and lamellae, and about 10-12 castaneous- 

 pellucid, low ventral trabeculas; segments filiform, longer than 

 teeth, united only at the summit or entirely free, sometimes 

 remaining on the ripe capsule only as short, filiform, cilia- 

 like structures between the teeth ; exothecial cells rounded, 

 castaneous-pellucid, incrassate-collenchymatous, the upper 

 laterally oblong and smaller ; spores mature in summer, cas- 

 taneous-pellucid, incrassate, minutely papillose, varying from 

 about .016-.025 mm. 



On sticks and the bases of bushes along creeks and around 



ponds; New Brunswick to Minnesota and Pennsylvania. Not 



yet found in our region, excepting along the northern border. 



McKean : Bradford. D. A. B. (Porter's Catalogue) ; 



Riverside, N6w York, a few miles north of 



Bradford. D. A. B. October 18, 1897. 



(Figured). 



Family XXV. CLLMACBAB. 

 Dioicous ; flowers on secondary stems and at base of 

 branches ; gregarious, large and stately, growing in swamps : 

 stems rhizome-like, subterranean, radiculose, with smooth, 

 branched, reddish-brown rhizoids, secondary shoots 3- to sev- 

 eral-angled, erect, with tree-like branching, with central 

 strand ; branches leafy, cylindric, simple, pinnate or bi-pinnate ; 

 paraphyllia numerous ; leaves dimorphous, the rhizome and 



