MUSCI. (MOSSES.) 79 
56, emend., but is a larger plant, the leaves narrower and entire, with a much 
Europ. : 
H. noterophilum appears not unlike H. filicinum, var. Vallisclause, Bryol, Brit. 
(H. Vallisclause, Brid.), but differs in the inflorescence. 
78. HI. riparium, Hedw. Monecious; stems much elongated, the di- 
visions distantly and subpinnately branched ; leaves usually remote, bifariously 
directed, ovate and oblong-lanceolate, acuminate, entire, costate half-way ; thin; 
areolation minute, linear-rhomboidal ; are oblong, cernuous. — Common 
stones in rivulets. — Quite variable. (Eu.) 
79. TH. potsgamum, Bryol. Enrop. Staminate, ape and_her- 
maphrodite flowers in clusters, 2nd on the same stem; stems procumbent or 
ascending, irregularly and sw soe branched ; leaves ahs. ram 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 bicseiste at the base, scarious ; areolation minute, linear; the cellules 
rrent angles enlarged, plisoe? capsule yea cernuous, broadly 
Gags Gicane: British America, Drummond.— Very m h like H. stel- 
latum, but somewhat smaller, and not so harsh a rates 
0. HH. Lesettrii, Sulliv. (Muse. Bor.-Amer. No. 350.) Moncecious; 
stems prostrate; branches erect, Pe or divided ; nae lax, widely sp 
ing, broadly ovate, very shortly acuminated, concave, with a thickened erircan 
border composed of several ae of linear flexuous cellules, which elsewhere 
rhombic-oval; costa stout, extending to the seerulate point ; apteed pea 
allu- 
cernuous, broadly annulate ; quceende acutely conic.—On w et Tr 
lah Falls, Georgia, Lesquereux. Also Brattle dng “Vibaias t, hd 
§ 21. PLAGIOTHECIUM, Bryol. Europ.— Stems jrocumbent or erect, spar- 
ingly branched ; branches usually subcompressed or complanate, Pe assurgent, 
mostly simple: leaves ovate and ovate-lanceolate, more or less unsymmetrical, ecos- 
. tate or shortly bicostate ; areolation elongated-rhomboidal, or linear and fleruous : 
capsule oblique, cylindrical, moderately curved, sometimes oblong, erect, and equal. 
* Inflorescence 
81. H. denticulatum, L. Stems prostrate, 2!-3! long, stoloniferous ; 
ce obliquely cahnacunianl. shortly bicostate, paces i 
y reflexed; areolation narrow and elongated; capsule oblong inclined ; 
neha conic, acute ; meses bai compound ; pedicel loose 
tufts, on tussocks, in s of moist rocks: variable. —On the 
White Mountains, N. a occurs what may be a form of this species; 
but e is vovapenl with an upright growth, and an erect regular and narrowly 
ing 
Era mete it that its inner peristome is ciliolate, and even i in this respect not 
ring from specimens received from W. P. Schimper under that name. (Eu.) 
82. H. Muhlenbéchii, Bryol. Europ. Stems scarcely 1’ long, ascend- 
ing; branches short, arcuate-erect, fasciculate ; leaves complanate, ovate-lance- 
olate, long-acuminate, su subsecund, serrulate, shortly bicostate, decurrent; cel- 
lules at the basal angles Papa f and inflated, elsewhere much smaller, elongated- 
G. M. 
