Hypnum.] BRYACE^. 875 



123. H. fluviatile, Swartz. Tufts flat, soft, dirty green; 

 stems with few radicles, prostrate, denudate of leaves in the 

 lower part by maceration ; branchlets few, suberect : leaves 

 more or less remote, open, ovate or oblong-lanceolate, concave, 

 the borders recurved at base; costa very thick, abruptly dis- 

 solved below the apex ; areolation very loose, oblong-ovate, 

 larger at the base, but uniform ; perichaetial leaves erect, costate : 

 capsule long-cylindrical, arcuate, solid, yellowish brown; peri- 

 stome normal. — Muse. Suec. 63. Amblystegium fluviatile, 

 Bruch & Schimp. Bryol. Eur. t. 567. 



Hab. On rocks, Closter, New Jersey [AusUn)\ Ontario (Mrs. Roy). 



124. H. adnatum, Hedw, Plants depressed, in wide flat 

 pale green or yellowish mats; stems creeping, irregularly 

 branching, closely raraulose ; branchlets short, distichous : leaves 

 close, erect-spreading, ovate or oblong, gradually acuminate, 

 very concave and entire, ecostate or shortly bistriate at base ; 

 areolation pellucid, subrhomboidal, prosenchymatous, elongated 

 at base, smaller, quadrate and opaque at the basilar angles ; 

 outer perichaetial leaves ovate, narrowly acuminate, spreading, 

 the inner larger, erect, oblong, abruptly acuminate, coarsely and 

 irregularly dentate below the point, more distinctly costate to 

 the middle : capsule erect, cernuous, oblong, unequal, gradually 

 narrowed to a short pedicel, reddish above, yellowish below; 

 operculum pale, convex-conical, more or less long-pointed ; teeth 

 yellowish; cilia one or two, nearly as long as the entire seg- 

 ments ; annulus persistent. — Spec. Muse. 248, t. 64 ; Sulliv. 

 Mosses of IT. States, 78, and Icon. Muse. 197, t. 121. 



Hab. Shady woods on stones or on trees near the surface of the 

 ground ; common and variable. 



125. H. compactum, Muell. Plants small, in very com- 

 pact tufts, reddish brown within, greenish on the surface ; stems 

 slender, 2 or 3 cm. long, erect, fasciculately ramose, tomentose- 

 radiculose to near the apex ; branches closely foliate : leaves 

 erect-spreading, ovate-lanceolate, gradually acuminate, decurrent 

 at base, concave, serrulate on the borders especially below, 

 thickly costate to near the apex; areolation loose, narrowly 

 rhomboidal, fusiform, with few smaller quadrate alar cells; 

 perichastial leaves oblong, more abruptly acuminate, distinctly 

 serrulate at the a]iex, narrowly costate : capsule erect or slightly 

 inclined, oblong, thin, constricted under the broad orifice, long- 



