130 BRYACE^. [Barbula. 



three times ; annuUis none, — Bryol. Eur. t. 639. Didymodon 

 fragilis^ Hook. & Wils. in Drumm. Muse. Amer. n. 127. Tor- 

 tula fragilis^ Wils. ; Lindb. Trichost. 253. 



Hab. Rocky Mountains {l)rmmnowl)\ Lake Superior {Arjas8i7J)\ 

 Ausable River, base of the Adirondack Mountains, New York {Lesque- 

 reux) ; limestone rocks, New Jersey {Austin). Very rarely fertile. 



§ 7. Squaeros^. Plants long., widely and loosely cesintose: 

 leaves of equal size the lohole length of the stem, long-lan- 

 ceolate, squarrose ; cells minute, cldorophyllose, loose at the 

 base: fotoers dioecious, axillary. 



40. B. squarrosa, Brid. Tufts yellowish green, not 

 tomentose-radiculose : leaves densely tufted at the top of the 

 fertile plants, sheathing at base, recurved and incurved, squar- 

 rose, twisted-crispate when dry, long-lanceolate, undulate on 

 the borders, serrate at the apex ; costa thin, excurrent or per- 

 current ; perichaetial leaves half-sheathing : innovations bearing 

 sometimes a number of perichaetia, each with a single fruit : 

 calyptra very narrow, fugacious : capsule small, ovate-oblong or 

 cylindrical, a little curved; pedicel long, reddish below, yel- 

 lowish in the upi)er part ; teeth very long and slender, twice 

 convolute, with short constricted articulations, pale purple, 

 very pai:)illose and fugacious; annulus narrow, simple. — Bryol. 

 Univ. i. 833 ; Bryol. Eur. t. 152. Pleurochmte squarrosa, 

 Lindb. Trichost. 253. 



Hab. On the ground, at the roots of pines, near Lebanon, Tennessee 

 (J. Eobinson); Texas (WiHyht). Extrerqely rare, and only sterile speci- 

 mens as yet found in North America. 



§ 8. Syntrichi^. Plants robust : leaves oblong. Ungulate or 

 ovate-sjMtulate / cells small, thick, chlorophyllose, papillose, 

 hexagonal above, larger, hyaline and hexagonal-rectangular 

 below : calyptra large : capside oblong or cylindrical, gen- 

 erally subarcuate, on a stout pedicel ; teeth attcLchcd to a long 

 tubular membrane spirally tessellated, entire or rarely per- 

 forated or cribrose. 



41. B. subulata, Beauv. Moncecious: loosely cespitose ; 

 plants short, simple or divided, radiculose at base : leaves ovate 

 and spatulate-oblong, pointed or more or less long-mucronate by 

 the excurrent costa, entire or serrate at the apex, plane on the 

 borders, either entire or surrounded by a border of yellowish 

 Ions; thick-walled cells : male flowers on short lateral branches : 



