32 MUSCI. (MOSSES.) 
castate, plane on the margins ; areolm above guttulate; below, enlarged oblong. 
{Name from {vyés, a pair, and é8er, teeth, in allusion to the paired teeth.} 
Lappénicus, Br. & Sch. Stems }’-1/ high, radiculose ; leaves 
spreading, crisped when dry; capsule scarcely exserted, 8-ribbed ; peristome 
none: moneecious; male flower gemmiform. — Rocks, on the White ae 
of New Hampshire, Oakes: Alleghany Mienake of Pennsylvania, Lesquer 
(Tab. 16.) (Eu.) 
2. Z Mougeétii, Br. & Sch. More elongated and branched than No. 
1; differing chiefly in its narrower and less concave perichetial leaves twice as 
long, the longer rostrum to the operculum, and the dicecious inflorescence. — 
With No. 1, in similar places, according to Mr. Th. P. James, (Eu. 
3. Z. Sullivantii, Mull. Stems 1/-2 high, slender, with long filiform 
branches ; leaves subsquarrose from an erect half-clasping base, complicate-con- 
cave; the margins below recurved, above plane and shite serrate ; fruit 
unknown. — (Syrrhopodon excelsus, Sulliv. Muse. Alleghan., No. 170.) —No 
Carolina; on rocks, top of Grandfather aseiith, ome $ Sullivant : Black 
— 
31. DRUMMONDIA, Hook. (Tab, 16.) 
Calyptra large, cuculliform, rostrate, slightly plicate at the base, and papillose 
at the apex. ,Operculum obliquely long-rostrate from a convex base. Capsule 
globose-oval or wine obovate, exsertly pedicellate. oe single: teeth 
16, very short, truncate. Inflorescence dicwcious: male flow iform.— 
Perennial, growing on pone stems prostrate ana up numerous short 
ranches, bearing fruit on their a leaves oblong, costate; areolz minute, 
roundish. — (Named after the late Tho abt oom who made extensive and 
very valuable collections of North American Mosses.) 
i claveliata, Hook. Stems 2/-4! | g, creeping, densely covered 
with ne Nesities crowded, erect, 2! -— - highs soup close, erect-patent, 
shortly acuminate; costa ceasing with the apex. nd 
thin mats (3/-10! in diameter), on the bark of trees ae the Beech), 
Northern, Middle, and Western States. (Tab. 16.) 
Trisz XII. ORTHOTRICHESA. 
32. ORTHOTRICHUM, Hedw. (Tab. 16.) 
Calyptra large, campanulate, longitudinally plaited, crenate-lacerate at the 
base, hairy or glabrous. Operculum short, conic, rostellate. _ pyriform, 
6 
me single or double, ae wanting; the 
outer 16 teeth, with a medial ie ost in pairs (often ae ed when dry) 5 
the inner 8 or 16 cilia. Inflorescence moneecious or dicecious; male flower 
gemmiform. — Perennial plants, growing in roundish shinee tufts, cn trees 
or rocks, never on soil; stems usually erect, simple or branched by innovations, 
fertile at their summit; leaves crowded, elongated, costate nearly to 
