OF WESTERN PENNSYLVANIA 215. 



perichsetial leaves loosely appressed-sheathing, non-plicate, the 

 inner surpassing the capsule: seta about 2-3.5 mm. long, 

 wrapped in the perichaetial leaves; capsule oval-oblong, about 

 1.2-1.5 mm. long, about 2:1, castaneous, small-mouthed, dark-"' 

 rimmed; lid conic, obliquely short-rostrate; peristome-teeth 

 rather broad, irregular, pale to whitish, papillose, often bifid 

 at apex, the inner peristome very thin, narrow, and without 

 segments or cilia ; spores mature in winter or late fall, pale, 

 rather thin-walled, granular. 



On trees and rocks in hilly or mountainous regions ; from 

 Nova Scotia to Kansas and south to the Gulf States. Rather 

 cornmon in our region. 



Cambria : Cresson. T. C. Porter and T. P. James. 



(Porter's Catalogue). 

 Crawford : On bark at base of Fraxinus nigra, near 



Linesville, June 11-12, 1907. O. E. J. 

 McKean : Quintuple, November 11, 1893, (approach- 



ing L. sciuroides in acumination of leaf- 

 apex) and Langmade, near Bradford, Au- 

 gust 11, 1895. D. A. B. (Figured). 

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

 2. Leucodon julaceus [Linnaeus] Sullivant. 

 (Hypnum julaceuin Linnseus ; Pterigynandrum julaceum 

 Hedwig). 



(Plate XXXII) 



Resembling the preceding in habit but with shorter sec- 

 ondary stems and distinctly terete branches, which are julace- 

 ous when dry: leaves crowded, closely appressed-imbricate 

 when dry, scarcely secund, ovate-elliptic, abruptly short-ac- 

 uminate, entire or slightly serrulate at apex, the margins often 

 recurved, blade concave, scarcely plicate, the base rounded 

 and sub-clasping; leaf-cells mainly as described for the genus, 

 but the upper much shorter and broader than in the other 

 species, in the median upper third rhombic-oblong, incrassate, 

 about 2-3:1, seriate; the marginal rounded-hexagonal but 

 towards the base usually densely transversely oblong-hexa- 

 gonal, the basal median linear-vermicular and much incrassate, 

 those above becoming shorter; costa none; perichastial leaves 

 linear-oblong, filiform-acuminate, reaching well up to the cap- 

 sule : seta slender, partly exserted ; capsule turgid-oval, cas- 

 taneous, about 0.5-0.7X1 mm.; annulus none; lid obliquely 

 short-rostrate, about half as long as the urn ; peristome closely 

 similar to that of L. brachypus, the teeth apically bifid; spores 

 mature in fall. 



In woods on tree-trunks, often mixed with other mosses, 

 from New England to Michigan and south to Florida and 

 Texas. Probably will prove to be not uncommon in our region. 



