84 A MANUAL OF MOSSES 



tending half-way to apex or a little above ; costa strong, ending- 

 just below or in the apex; leaf-cells irregularly angular to 

 rounded-hexagonal, about .008-.012 mm. in diameter, some 

 of these next to the costa larger, the marginal 3 or 4 rows 

 paler and forming a rather obscure belt around the leaf, all 

 cells incrassate : seta ascending, usually about 1 cm. high, 

 smooth, light chestnut color, arising from the lower half of the 

 stem; capsule oblong, smooth, about 2 mm. long, tapering to 

 the seta, ascending to nearly erect, chestnut-brown, con- 

 stricted below the mouth at least when old; peristome bright 

 red-chestnut, the teeth split at one-third above the base into 

 two very slender, trabeculate, somewhat spirally papillose 

 prongs: operculum conic, rostrate; spores about .020 mm. in 

 diameter, smooth, pale yellowish, globose. Mature in winter 

 or early spring. 



On moist soil and stones or occasionally at base of trees, 

 Xova Scotia to the Gulf States and the Rocky Mountains, 

 Europe, Asia. 



Allegheny : Montrose, September 1, 1905, and \Yild- 



wood Road, November 19, 1908. O. E. J. 



Crawford : On bark at base of black ash, Linesville, 



June 11-12, 1907. O. E. J. (Figured.) 



Fayette ; Ohio Pyle, September 1-3. 1906. O. E. J. 



and G. K. T. : Ohio Pyle. July 4, 1908. O. 

 E.J. 



McKean ; Bennett Brook. Bradford. May 3. 1893. D. 



A. B. 



7. Fissidens adiantoides [ Linnaeus] Hedwig. 



This species differs chiefly from / ; . cristotus in that the cells 

 are larger, .012-.016X-015-.025 mm., distinct; seta usually 

 longer than in P. cristatus, about 1-2.5 cm. long. The plants 

 are often much larger. 2-15 cm. high, and are monoicous instead 

 of dioicous, as in P. cristatus. 



This species is reported as common in the eastern United 

 States but all the specimens we have seen from our region labeled 

 as P. adiantoides we have referred to P. cristatus. 



8. Fissidens taxifolius [Linnaeus] Hedwig. 



(Hypjiuin ta.ri folium Linnaeus) 

 (Plate XI) 



Plants gregarious, light green, branching at base, usually 

 5-10 mm. high, erect to ascending: stem rather stout and 

 rigid ; leaves close, imbricate, oblong-ovate, apiculate, uniform- 

 ly crenulate, non-bordered, ascending, the middle leaves usual- 

 ly longest and up to 2 mm. long, the inferior lamina ending 

 abruptly at the base, sheath extending to the middle or beyond ; 

 costa strong and excurrent in the apiculus ; leaf-cells rounded- 



