330 BRYACEJS. [Hi/pnum. 



costa subpercurrent. Capsule cernuous. Operculum convex- 

 conical. 



24. H. paludosum, Sulliv. Monoecious: plants yellowish 

 green ; branchlets distichous, slender, unequal : leaves open- 

 erect, cordate-concave at base, lanceolate, acuminate, reflexed 

 on the borders, strongly costate to the denticulate aj^ex, smooth 

 on both faces; paraphyllia ciliate, numerous; inner perich^tial 

 leaves oblong, gradually narrowed into a short slender point, 

 jjlicate-striate lengthwise : capsule oblong-cylindrical, thicker 

 above, cernuous ; operculum conical, apiculate, short ; segments 

 cleft between the articulations ; cilia three, as long as tiie seg- 

 ments ; annulus large. — Muse. Allegh. n. 7, Mosses of U. States, 

 68, and Icon. Muse. 157, t. lUl. 



Hab. Not rare in the cranberry marshes of Northern Ohio; Rhode 

 Island {Olney); Massachusetts (liussell); Vermont (Frost), etc. 



This species so much resembles //. Blandovli that it has sometimes 

 been confounded with it. It differs in the paraphyllia less densely 

 crowded upon the stems, the leaves not papillose and not fringed at the 

 basal margin, the segments cleft, etc. 



Subgenus VI. TRIPTEROCLADIUM. 



Plants loosely cespitose, intricate ; stems compressed ; 

 branches compressed or subterete, attenuated, irregularly pin- 

 nate. Leaves erect, more or less open, very smooth ; cells of 

 the areolation elliptical, the alar quadrate-rhomboidal. Capsule 

 erect, cylindrical, cernuous. Operculum conical. Flowers 

 monoecious. 



25. H. leuCOCladulum, Muell. Stems long, very slender, 

 filiform ; lower branchlets shorter, brown by maceration, the 

 upper long, attenuate-filiform, subjulaceous : stem-leaves close, 

 erect or open, small, exactly ovate from the decurrent base, 

 obsoletely denticulate at the apex ; those of the branches oblong 

 and naiTower, all very short, bicostate, concave, revolute at the 

 base, pale green ; inner perichaetial leaves numerous, large, 

 sheathing at the broader base, short-acuminate, reflexed, the 

 upper all very slightly denticulate : calyptra glabrous : capsule 

 erect, small, cylindrical-oval, on a short very slender reddish 

 flexuous pedicel, slightly cernuous, reddish, glossy ; operculum 

 small, conical, acute ; annulus narrow ; teeth distinctly latticed; 



