142 A MANUAL OF MOSSES 



3. Webera nutans [Schreber] Hedwig. 

 (Plate XVII) 

 (Pohlia nutans Lindberg;). 



More or less densely cespitose, usually dark green : stems 

 about 1-2 cm. high, branching by lateral innovations, or from 

 the base, erect, matted with a castaneous tomentum below, 

 reddish ; leaves ovate below to much longer and linear-lanceo- 

 late in the comal tuft, hardly decurrent, the comal long- 

 acuminate, the margin often somewhat recurved below, denti- 

 culate towards apex, leaves somewhat shrunken, twisted and 

 lustrous when dry; costa strong, reddish, ending in or a little 

 below apex ; leaf-cells long-rhomboid and more or less pointed 

 and prosenchymatous above, rectangular below, slightly nar- 

 rower towards the margin: seta slender, flexuous, usually 2-3 

 cm. long, lustrous, castaneous below, often yellowish above; 

 capsule horizontal to sub-pendulous, oblong to obovate, usual- 

 ly about 3-4 mm. in length, with a distinct but short neck, 

 often gibbous when dry and then contracted below the wide 

 mouth, yellowish to brown in age ; operculum convex-mamil- 

 late; peristome-teeth orange-yellow below, paler and papillose 

 in the rather abruptly narrowed upper half, strongly trabecn- 

 late, lamellate, divisural zigzag and distinct; segments about 

 as long, carinately split and gaping below but remaining un- 

 split at apex; cilia nearly as long, two in number, filiform, 

 articulate, basal membrane half as high as teeth ; annulus wide, 

 revoluble; spores smoothish, yellowish-pellucid, about .014- 

 .016 mm., mature in early summer : autoicous ; antheridia in 

 axils of upper leaves. 



On soil and decaying wocsd in moist places or swampy fie! 's 

 or woods. Cosmopolitan and common. 



Allegheny : Power's Run, May 11, 1904, May 28, 1905, 



June 17, 1908, May 12 and 22, and June 

 17, 1909. O. E. J. 

 Armstrong : Kittanning, August 16, 1906. O. E. J. 

 Beaver : Beaver Falls, May 14, 1907. O. E. J. 



Cambria : : Cresson, May 18, 1904, St. Lawrence, July 



24, 1908. O. E. J. 

 Center : Barrens near Scotia, July 14, and Tussey's 



Mt., near Shingletown, July 15, 1909. O. 

 E.J. 

 Crawford : Linesville, June 6, 1904, May 12 and June 



12, 1908. O. E. J. Hartstown, May 29- 

 30, 1909. O. E. J. and G. K. J. 

 Erie : Presque Isle, May 8-9, 1906 (Figured), 



and June 8-9, 1906. O. E. J. 



