620 (20) MUSCI. (MOSSES.) 
1. D. longiréstre, Br. & Sch. Stem 1/-3/ high, with innovations from 
near the apex; leaves fragile, more or less falcate-secund, subulate-sctaceous 
from a dilated base; costa broad, occupying all the upper portion of the leaf. — 
On rocks, Alleghany Mountains. (Tab.I.) (Eu.) 
13. TREMATODON, Rich. 
Calyptra cuculliform, inflated. Operculum subulate-rostrate. Capsule oval- 
oblong, inclined, with a very long collum, annulate, ae Legere Peristome 
aos teeth 16, linear-lanceolate, perforated, or more or less cloven. Inflores- 
nce dicecious: male flower gemmiform. — Short-ste: ‘nists gregarious oe 
with long subulate-setaceous and rine rant ashi leaves. (Name fr 
por a perforation, and dev, a tooth.) (Tab. I.) 
Ongicdéllis, Rich. Capsule with a narrow linear collum of twice 
its i ing pedicel 1}’—2/ long, slender, flexuous, straw-colored. ee and 
ndy soil, New England to Florida, and Ohio, Cassels. (Tab. 
14. DICRANUM, Hedw. (Tab. IL) 
Calyptra cuculliform. mh rculum conic, long-subulate-rostrate. Capsule 
oval, oblong or cylindrical ar or somewhat gibbous, erect or cernuous, 
lon ng-pedic ellate. Pbeistonis inate teeth 16, linear-lanceolate, cloven half-way 
i icecious : 
male flower gemmiform, terminal. — Perennial abe growing on the ground 
or on rocks; stems from a few lines to several inches in mar fastigiately 
branched and continued by innovations from near the apex; leayes most ly 
linear-lanceolate and lanceolate-subulate, continudusly itil often falcate- 
secund, with a minute, rt roundish areolation above. (Name from 
dixpavos, forked, alluding to the .) 
§ 1. CYNODONTIUM, Br. & Sch. — Leaves more or I ess papillose, crenulate-ser- 
rate at the apex ; the areolation ve at the bei calyptra a 
capsule mostly strumose and erect 
1. D. graciléscems, Web. & Mobr., var. tenellum, Bryol. Europ. 
Stems ~—e 4! tne high ; leaves linear-lanceolat, scarcely papillose, the mar- 
gins ab le exannulate, oval, not 
atrumiboes, nahaly aie White: Mts., New Hampshire, Oakes. (Eu. 
2. D. pol m, Ehrh. Stems 1/-9/ high; leaves linear-lanceo- 
late, variously curved, somewhat papillose on both surfaces, denticulate at the 
x and at the base; tee oval-oblong, erect, — or peas osann 
oe Hedw., var. baleen nbergii, Bryol. Europ. More ro- 
oblong, incurved, cernuous, prominently strumose, annulate. — Lake Superior, 
Agassiz. (Eu.) 
