Hypnum.] BRYACE^. 379 



131. H, stellatum, Schreb. Dioecious: plants robust, 

 erect or prostrate, in deep loose intricate bi-own or yellow tufts ; 

 stem subdichotomous, fastigiate, scarcely radiculose : leaves 

 close, squarrose, sul)decurrent, flattisl), very entire, glossy, 

 marked at base with two sliort yellowish striae instead of costa ; 

 areolation very narrow, enlarged and rectangular at the basal 

 angles ; perichaetium short, the lower leaves recurved from the 

 middle, the upper erect, j)licate lengthwise, gradually narrowed 

 into a long filiform point : male plant smaller and less divided 

 than the fertile: capsule incurved, cernuous, oblong or sub- 

 cylindrical, brown, sulcate and constricted under the orifice 

 when empty ; operculum highly convex-acuminate ; teeth 

 orange at base, yellowish above ; segments slightly cleft ; cilia 

 two, nearly as long as the segments ; annulus broad, compound. 

 — Spicil. Fl. Lips. 92; Bryol. Eur. t. 584. Atnhlystegium 

 stellatum, Lindb. 



Var. protensum, Bruch & Schimp. 1, c. Stem drooj^ng, 

 much branched and densely ramulose, in dense yellowisli green 

 tufts : leaves shorter. 



Hau. Boggy prairies and swamps ; rare in fruit. Found in fruit near 

 Lancaster, Pennsylvania (T. C. Porter}. The variety at Little Falls, New 

 York; Canada {Macoiin). 



132. H. polygamum, Wils. Closely related to the last, 

 differing in its less robust plants in shorter greenish brown tufts, 

 the leaves less crowded and less squarrose, narrower and com- 

 paratively longer, ovate or oblong at base, gradually narrowed 

 into a long subulate point, narrowly costate to below the point, 

 and the areolation looser : perichaetium radicidose below, the 

 flowers fertile and bisexual, ncjorreo-ated at its base. — Bryol. 

 Brit. 365; Schimp. Coroll. 131. Amhlystegiimi j^ohjgamum, 

 Bruch & Schimp. Bryol. Eur. t. 572. H. stellatum, Drumm. 

 Muse. Amer. n. 184, in part. 



Hab. British America (Drummond) ; swamps around Closter, New 

 Jersey [Austin] ; Chelsea, Massachusetts (James). 



Subgenus XVIII. HARPIDIUM. 



Plants with few brandies, rootless, long, subpinnately ramu- 

 lose, more or less hooked-curved. Leaves falcate-secund, fili- 

 formly acuminate, simply costate, of firm texture ; areolation 

 narrow, linear, enlarged toward the base and generally inflated 



