Jennings: Manual of Mosses — 14. Bryaceae 129 



stem reddish; leaves rather lax, somewhat tufted, close, erect-spreading, ovate- 

 lanceolate, long-cuspidateacuminate, more or less recurved on the borders, 

 reddish at base, usually obscurely denticulate at apex, when any rigid, shrunken 

 and somewhat twisted; costa stout, reddish, long-excurrent; leaf cells with thick- 

 ened corners rather small, rhomboidal to somewhat elongate above, at base thin- 

 walled, rather inflated, rectangular, at margin linear-prosenchymatous in 2-4 

 rows, forming a weak border: seta usually 3 cm long, slender, flexuous, lus- 

 trous, castaneous; capsule pendulous, elongate oval-pyriform, usually 4-5 mm 

 long, tapering below into a neck at least 1.5 mm long, brownish, hardly con- 

 tracted below the mouth except when dried prematurely; annulus 2-3 seriate, 

 revoluble; operculum rather small, conic-apiculate; peristome-teeth linear- 

 triangular, yellowish-pellucid below, sub-hyaline and papillose above, strongly 

 trabeculate and with prominent oblique or vertical connections between the 

 plates, the lamellae and divisural indistinct, the inner peristome more or less 

 closely adherent to the teeth, the segments narrow, the cilia 2-3 and rudi- 

 mentary, the basal membrane about two-fifths the height of the teeth; spores 

 large, .024. 030 mm, yellowish-pellucid, irregularly rounded-quadrate to hex- 

 agonal, the upper four or five rows much smaller, rounded to transversely 

 elongate, reddish-pellucid: synoicous: mature in June. 



On earth, rocks, walls and decaying logs. Temperate regions and moun- 

 tains of Europe, Algeria, Asia, and North America from Greenland to Alaska 

 and south to the northern United States, as far as District of Columbia, 

 Pennsylvania, Ohio, etc. 



Rare in our region. Allegheny Co.: Sloping shaly hillside. Fern Hollo.v, Pitts- 

 burgh, June 8. 1909. G.K.J, (figured). 



2. Bryum uliginosum (Bridel) Bryologia Europaea 

 (DidymoJon cernuum Swartz; Bryum cernuiim Lindberg) 



Loosely tufted, green to somewhat brownish: stems branched, more or less 

 erect, slender; leaves up to 4 or 5 mm long, narrowly lance-ovate, acuminate, 

 erect-spreading when moist, closely compacted and wavy when dry, only very 

 slightly decurrent; costa percurrent to short-excurrent; cells rhomboidal-hexag- 

 onal, thin-walled, with a distinct margin of thickened cells: autoicous, an- 

 theridial flowers gemmiform, on short branches, inconspicuous: seta slender, 

 erect, up to 5 cm long; capsule erect to sub-pendulous, more or less arcuate, 

 oval-pyriform, neck often longer than rest of capsule, slenderly tapering, the 

 mouth small and oblique; operculum small, low convex-conical, peristome 

 teeth pale yellow, broad below, slenderly acuminate, papillose, trabeculae dis- 

 tinct; basal membrane high, segments pale yellow, papillose, gaping; cilia none 

 or rudimentary; spores castaneous, papillose, about .025 mm in diameter, 

 mature in summer. 



Boggy or sandy places in Eurasia; in North America from northern Canada 

 south to New York, Ohio, Illinois, and the Southwest. Not yet reported from 

 our region. 



3. Bryum tortifolium Funck 



(Bryum obtusifolium Lindberg; B. cyclophyllum Bruch and Schimper) 

 In low soft tufts, rarely over 2 cm high; leaves distant, scarcely narrowly 



