musci. (mosses.) 079 



55, 56, emend., but is a larger plant, the leaves narrower and entire, with a much 

 heavier costa. The true Swartzian H. floyiatile of Wilis. Bryd. Brit.; Bryol. 

 Eurap. fasc. 62-64, is a soft and flaccid plant, the ramification not pinnate. 

 H. iioterophilnm appears not unlike H. nlieinum, var. Vallisclausse, Bryol. Brit. 

 (H. Vallisclausse, Brid.), but differs in the inflorescence. 



78. 13. ripiariuin, Hedw. Monoecious; stems much elongated, the di- 

 visions distantly and subpinnately branched ; leaves usually remote, hilariously 

 directed, ovate and oblong-lanceolate, acuminate, entire, costate half-way; thin; 

 areolation minute, liuear-rhomboidal ; capsule oblong, cernnous. — Common 

 about swamps ; also on stones in rivulets. — Quite variable. (Eu.) 



79. II. g»o!igaE3lslM5, Bryol. Europ. Staritinatc, pistillate, and her- 

 maphrodite flowers in clusters, and ou the same stem ; stems procumbent or 

 ascending, irregularly and subpinnately branched; leaves entire, spreading, sub- 

 squarrose, long and subulately acuminated from a concave, cordate, or ovate- 

 lanceolate base, the point variously directed, costate half-way, or more or less 

 distinctly bieostate at the base, scarious ; areolation minute, linear ; the cellules 

 at the decurrent angles enlarged, oblong ; capsule oblong, cernnous, broadly 

 annulate. — Swamps, British America, Drummond. — Very much like H. stel- 

 latum, but somewhat smaller, and not so harsh a species. 



80. H. Lescurii, Sulliv. (Muse. Bor.-Amer. No. 350.) Monoecious; 

 stems prostrate ; branches erect, simple or divided ; leaves lax, widely spread- 

 ing, broadly ovate, very shortly acuminated, concave, with a thickened yellowish 

 border composed of several lines of linear flexuous cellules, which elsewhere are 

 rhombic-oval ; costa stout, extending to the serrulate point ; capsule oblong, 

 cernuous, broadly annulate ; operculum acutely conic. — On wet rocks, Tallu- 

 lah Falls, Georgia, Lcsquereux. Also Brattleborough, Vermont, Frost. 



$21. PLAGIOTHECIUM, Bryol. Europ. — Stems procumbent or erect, spar- 

 ing!// branched; branches usually subcompressed or complanate, elongated, assurgent, 

 mostly simple : leaves orate and orate-lanceolate, more or less in/symmetrical, eeos- 

 tate or shortly bieostate ; areolation elongated-rhomboidal, or linear and flexuous : 

 capsule oblique, cylindrical, moderately curved, sometimes oblong, erect, and equal. 



* Inflorescence monoecious. 



81. H. denticatlafUHB, L. Stems prostrate, 2' -3' long, stoloniferous ; 

 leaves obliquely ovate-acuminate, shortly bieostate, decurrent, the margins nar- 

 rowly refiexed ; areolation narrow and elongated ; capsule oblong inclined ; 

 operculum conic, acute; annulus large, compound: pedicel red. — In loose 

 tufts, on tussocks, in swamps and crevices of moist rocks: variable. — On the 

 White Mountains, N. Hampshire, occurs what may be a form of this species ; 

 but it is smaller, with an upright growth, and an erect regular and narrowly 

 annulate capsule ; according well with Plagiothecium lsetuin, as given in Bryol. 

 Europ., except that its inner peristome is ciliolate, and even in this respect not 

 differing from specimens received from W. P. Schimper under that name. (Eu.) 



82. M. ftllilsleaalseckii, Bryol. Europ. Stems scarcely 1 ' long, ascend- 

 ing ; branches short, arcuate-erect, fasciculate ; leaves complanate, ovate-lance- 

 olate, long-acuminate, subsecund, serrulate, shortly bieostate, decurrent; cel- 

 lules at the basal angles large and inflated, elsewhere much smaller, elongated- 



