134 A MAXUAL OF MOSSES 



long to obovate-lanceolate, slightly serrulate above the middle, 

 Hat and spreading when moist, somewhat crisped and incurved 

 when dry; capsule erect, 1.5-2 mm. high, globose to pyriform, 

 when dry becoming turbinate and constricted below the mouth 

 and at the base, finally becoming brown and urn-shaped ; 

 exothecial cells slightly incrassate, rhomboid to hexagonal, the 

 mouth bordered by about 9-12 rows of laterally somewhat 

 elongated cells and a narrow fringe of orange-pellucid and 

 much smaller cells in 1-3 rows ; operculum convex, bluntly 

 mamillate to sub-rostrate; calyptra somewhat oblique, rostrate, 

 unequally split at base into 3-5 lobes ; spores decidedly papil- 

 lose, orange-pellucid, in our specimens measuring about .026- 

 .040 mm., mature in May and June, occasionally later: autoic- 

 ous. 



Common on bare earth in fields, along roadsides, etc., from 

 Quebec to Florida and west to the Rocky Mountains, and also 

 in California. 



Allegheny : Power's Run, April 28, 1907, and Thorn- 

 hill, May 17, 1906. O. E. ). and G. K. J. ; 

 Pittsburgh, April 28, 1907. G. K. J. ; 

 Kennywood, May 3, and Carnot, May 18. 

 1902." I. A. S. ; Aspinwall, April 9, 1905. 

 Schenley Park, May 16, 1907. Power's 

 Run. May 21, 1905, and Douthett, June 

 5. 1909. O. F, T. (Figured). 

 Beaver : Heaver Falls. May 14, 1907. O. F. J. 



Crawford 

 Lawrence 

 McKean 



Linesville, May 10-11, 1906. O. E. J. 

 New Castle, 1906. Miss Susan Gageby. 

 Gates Hollow, April 29, and Quintuple, 



June 13, 1898. D. A. B. 

 Somerset : Ursina, May 12, 1905. O. E. J. 



3. PL' X ARIA Schreber, Hedwig. 



Autoicous : the antheridial inflorescences discoid, terminal, 

 the archegonial on innovations: gregarious to cespitose : stem 

 usually simple, radiculose at base; lower leaves distant, small, 

 the upper becoming much larger, those at the apex more or 

 less upright and tufted or gemmiform, entire or serrate, more 

 or less acute ; costa incomplete to excurrent ; areolation lax, 

 elongate-rectangular to rhombic, at the margin sometimes 

 longer and narrower, forming a border : seta elongated, erect 

 or cygneous at fruiting time, later erect and twisted; capsule 

 with a thick collum or elongate-pyriform, symmetric to oblique, 

 arcuate, with a narrow mouth, smooth to plicate, erect to 

 cernuous : annulus large-celled, revoluble or none ; peristome 

 deeply inserted, double or simple, sometimes none ; teeth lance- 

 subulate, reddish to brownish-red, obliquely ascending to the 

 right ; segments as long or shorter, yellow, with basal mem- 



