654 
MUSCI. (MOSSES.) 
rent*, capsule elongated-cylindrical; basal membrane of the peristome 
produced into a tessellated tube longer than the teeth. — Rocky banks of 
streams : inflorescence as in No. 2. 
Dicranace m. 
22. CERATODON, Bridel. Ceratodon. 
Calyptra cuculliform. Capsule terminal, oblong, somewhat 
strumose, annulate. Peristome single, of 16 lanceolate teeth 2- 
cleft nearly to the base, their articulations prominent. Lid coni¬ 
cal-beaked. Inflorescence dioecious : sterile fl. terminal. (Name 
* formed of Kepas , a horn , and obovs, tooth; the teeth of the peris¬ 
tome nodulose, like a goat’s horn.) 
1. C. pur pure US, Bridel. Stems tufted, fastigiately branch¬ 
ed; leaves keeled, oblong-lanceolate, the margins reflexed, nerved to 
the apex; capsule cylindrical, nodding, striate. — Common on the 
ground. Capsule and pedicels dark and shining purple. 
23. TREMEATODON, Michx. Trematodon. 
Calyptra inflated-cuculliform. Capsule terminal, with a very 
long apophysis, annulated. Peristome single, of 16 lanceolate 
teeth, entire, 2-cleft or perforated (w T hence the name, from rptyw, 
a perforation , and dbovs, tooth) : otherwise nearly as in the last. 
1. X. loilgicollis, Michx. Stems short and nearly simple, 
leaves awl-shaped from an ovate base, flexuous, the nerve excurrent , 
capsule elongated-cylindrical, slightly curved, with a linear apophysis 
twice or thrice its length ; pedicel long, flexuose, straw-colored. 
Clay banks, New England: resembles Trichostomum pAllidum. 
24. DICRAKUilI, Hedwig. Dicranum. 
Calyptra cuculliform. Capsule terminal. Peristome single, of 
16 equidistant teeth which are 2-3-cleft to near their middle 
(whence the name, from bUpavov, a fork), the lobes equal and 
parallel. Lid beaked. Inflorescence monoecious or dioecious, 
gem mi form. 
1. D. SCOparium, Hedw. Stems ascending, branched, 
leaves falcate , turned to one side , lance-awl-shaped, channelled, 
rulate ; capsule cylindraceous, erect-drooping ; lid long-beaked. — 
Woods, on the ground and decayed logs; one of the largest and com¬ 
monest species, 3'-5' high. 
2. I>. undulutuill, Ehrh. Resembles closely No. 1; but the 
