Jennings: Manual of Mosses — 14. Bryaceae 127 



papillose, not prominently bordered; inner peristome yellowish, the basal mem- 

 brane constituting one-half or more of its height; segments split, cilia 2-3, 

 well developed, weakly articulate; spores medium size; operculum medium 

 size, quite convex, often apiculate. 



A genus of about 20 species, distributed over the whole earth, five of these 

 being in North America, one in our range. 



1. Mniobryum Wahlenbergii [Weber and Mohr] Jennings 



(M. albicans Limpricht; Webera albicans Schimpcr; Hypniim Wahlenbergii 

 Weber and Mohr; Pohlia Wahlenbergii Andrews) 



Plate XXII 



Cespitoss in soft, large, glaucous or whitish-green tufts: stems usually 2-6 

 cm long, more or less chestnut-red, especially in the older portion, slender, 

 flexuous. branched and matted tosether with a brownish tomentum at base; 

 leaves remote below, in the upper portion rather remote, about 2.5 mm long, 

 when dry somewhat shrunken but hardly twisted, spreading, widely ovate- 

 lanceolate, at the base narrowed and somewhat decurrent, the margin plane 

 and serrulate towards the obtusely acute apex; costa strong, reddish, ending a 

 little below apex; leaf-cells rhombic-hexagonal, pellucid, about .01 5-. 025 mm 

 wide, slightly narrower towards margin, tending to become inflated and rectan- 

 gular at base but hardly distinctly so, the lowermost often reddish: seta erect- 

 flexuous, 2-4 cm high, slender, yellowish to reddish-brown, abruptly hooked at 

 the summit; capsule pendent, shortly wide-pyriform, about 2.5 mm long, red- 

 dish-brown when ripe, the neck short and wide, when dry and empty the cap- 

 sule wide-mouthed; annulus none; peristome-teeth brownish-yellow, pellucid, 

 strongly trabeculate, the trabeculae often with oblique connections, the lamellae 

 and divisural indistinct, teeth lance-linear, papillose and sub-hyaline at apex; 

 segments equal in length to teeth, narrow, carinately split, the cilia 2-4, some- 

 times more or less connected at apex, nearly as long as segments, papillose, 

 not appendiculate; basal membrane nearly reaching middle of teeth; spores 

 smoothish, rather thin-walled, about .01 8-. 024 mm; operculum convex-apicu- 

 late; exothecial cells irregularly quadrate-hexagonal, yellowish-pellucid, rather 

 thin-walled, 2-3 rows at mouth much smaller and darker: dioicous; antheridial 

 flower terminal, discoid, the perigonial bracts wide-spreading; mature in our 

 region in May. 



Almost a cosmopolitan in ditches, springs, or on wet clay banks, etc. 

 Rarely fruiting but rather common sterile. 



Known from Allegheny, Beaver, Butler, Erie, McKean, Washington, and Westmore- 

 land counties. Specimen figured: Springy places. Quintuple, McKean Co., May 17, 1895. 

 D.A.B. 



4. Bryum [Dillenius] Schimper 



Mostly synoicous: paraphyses present, filiform: perennial, small, robust, 

 rarely gregarious, usually more or less densely cespitose: stem upright to as- 

 cending, often red, branching below the inflorescence, radiculose; lower leaves 

 remote, upper leaves tufted, mostly erect-spreading, concave, oval or ovate to 

 lanceolate, or elliptic to spatulate, mostly acute, often narrowed and decurrent 



