252 A MANUAL OF MOSSES 



oval-hexagonal, ranging from 1 to 3:1, the alar quadrate to 

 transversely oval-hexagonal in about 4-6 rows extending well 

 up the margins and becoming rounded ; cells smooth to lightly 

 papillose, incrassate ; inner perichsetial leaves long-sheathing, 

 long-acuminate : seta short ; capsule erect, sub-cylindric, sym- 

 metric, small, castaneous ; lid narrowly conic to short-rostrate ; 

 peristome short, the teeth whitish, lance-linear, the segments 

 shorter, irregular, subulate, basal membrane and cilia none; 

 annulns narrow ; spores mature in summer. 



On bases of trees, especially maples, in our region : Eu- 

 rope, and in the northeastern United States. Not common in 

 our region. 



Fayette : Cheat Haven, September 3-6, 1910. O. 



E. T. and G. K. J. 



McKean : Bennett Brook, Bradford, July 12. 1896. 



(Figured), and Bolivar Run, September 11, 

 1896. D. A. B. 



8. RAUIA Austin. 



Autoicous : quite slender, dull, bluish-green to brownish- 

 green : stems thickly-leaved, simple or divided, more or less 

 regularly pinnately branched ; branchlets short, ascending, 

 julaceous, obtuse; leaves dimorphic, drying imbricate, when 

 moist erect-spreading ; stem-leaves plicate, triangular to cor- 

 date-ovate, tapering to a lanceolate or lance-subulate acumina- 

 tion, the margins entire ; costa strong, incomplete ; median leaf- 

 cells rounded-angular, with low and usually numerous papillae 

 on both sides; branch-leaves lance-ovate, short-pointed, the 

 costa dorsally somewhat rough ; inner perichsetial leaves ap- 

 pressed, pale, lance-oblong, slenderly acuminate, entire, incom- 

 pletely costate, and with elongate, smooth cells : seta slender, 

 10-15 mm. long, reddish, smooth; capsule from nearly up- 

 right to horizontal, oblong-cylindric, mostly weakly curved, 

 light brown, drying more or less constricted below the mouth ; 

 annulus revoluble; peristome-teeth lance-subulate, bordered, 

 transversely striate, numerously trabeculate ; inner peristome 

 yellow, finely papillose, basal membrane prominent, carinate, 

 the segments about as long as the teeth, carinately split, the 

 cilia 2 or 3, more or less complete, nodose ; lid conic, short- 

 rostrate ; calyptra cucullate; spores .009-.011 mm. 



A genus of about 13 or 14 species, widely distributed in 

 both hemispheres ; 5 species in North America ; 1 species in 

 our region. 



1. Rauia scita (Beauvois) Austin. 



(Thuidhnn scitmu Austin: Hypnum scitinn Beauvois). 



(Plate XXXV) 



In appressed, green or yellowish-brown tufts, medium- 

 sized : stem prostrate, castaneous, 2-3-times divided ; densely 



