MUSCI. (MOSSES.) 23 
below the apex; capsule incurved-oblong, annulate. — Bogs, in mountamous 
districts, (Eu.) 
21. D. sptirium, Hedw. Stems usually short, — and condensed ; 
leaves ovate-lanceolate, acuminate, undulated, serrate; costa serrated on th 
k above, ceasing below the apex ; capsule cylindrical, ‘Heute strumose and 
incurved; when dry strongly ribbed. Ba pallidum, Bryol. Europ. ?)— Dry 
sandy soil, Ohio, and Southern States. (Eu.) 
22. D. undulatum, Turner. Loosely cespitose; stems 4 -6/ long, 
robust; leaves widely spreading, the upper ones falcate-secund, linear-lanceo- 
late from an oblong base, very much undulated, sharply serrate on the zi 
and the back near the apex; costa slender; capsule cylindrical, strongly arcu- 
ate, on long pedicels, 2 to 5 from the same perichath. —On the ground, in dry 
woods ; commo: 
3. D. m6ndii, Mull.— Very like No. 22, but distinguished by 
its longer and narrower wae, 28 so sharply serrate, papillose only on the 
ck, and cirrhose-crisped when dry. — White Mountains of New Hampshire, 
Oakes: Lake Superior, Agassiz. (Eu.) 
15. CERATODON, Brid. (Tab. 15.) 
Calyptra cuculliform. Operculum conic, subrostellate. Capsule cylindrical, 
subcernuous, annulate, long- elias Peristome single: teeth 16, linear- 
lanceolate, cloven nearly to the base into two equal segments; their articula- 
tions caine: eee dicecious, terminal: male flower gemmiform. — 
De ea 
olate-subulate, costate ; the areola above dense, roundish and small, below larger 
and diaphanous. (Name from xépas, a horn, and d8av, a tooth, the teeth of the 
peristome being nodulose like a cians horn. a 
1. C. purpure Brid. blong rinate, the margins 
recurved ; costa eect: liagiley Ha me aera ihe and strumose 
~ when dnpies — Very common everywhere: on the ground. (Tab. 15.) (Eu.) 
Tre V. LEUCOBRYER. 
16. LEUCOBRYUM, Hampe. (Tab. 16) 
Calyptra cuculliform. Operculum with a long-subulate rostram. Capsule 
1 aha stramo ose, raphe Peristome as in Dicranum. In- 
wer punass al. — White or pale-glaucous mosses, 
growing in dense compact masses; stems dichotomously ched ; leaves lan- 
ceolate-subulate, ecostate, composed of two or more layers of large, oe 
empty, rectangular-oblong, perforated cellules, with minute 3-4-sided intercel- 
lular chlorophyllose passages. (Name composed of Aevxds, white, and eal 
, from its pallid color.) 
. L. glatiticam, Hampe. Stems 3/-6' high, leaves fragile, crowded, 
cece above; capsule reddish-brown, ribbed when dry.— (Dicranum glat- 
cum, Hedw.) — About the roots of trees in moist ground, margins of swamps, 
