656 
MUSCI. (mosses.) 
two equal strata of empty cellules furnished with pores : between 
the strata are minute 3-4-sided intercellular passages filled with 
chlorophyl. (Name composed of Xcvkos, white, and ftpvov, Moss , 
from the pallid color.) 
1* F* VUlgare, Hampe. Stems erect, divided above, fragile; 
leaves closely imbricated, erect, ovate-lanceolate, channelled, rather 
obtuse, nerveless; capsule erect-nodding, slightly strumose, striate 
when dry. (Dicranum glaucum, Hedic.) — About the roots of trees, 
margins of swamps, &c.; growing in dense glaucous-green tussocks, 
3'-6' high. 
4 FiSSIDENTEjE. 
26* FISSIDENS, Hedwig. Fissidens. 
Calyptra cuculliform, rarely conic-mitriform. Capsule terminal 
or lateral. Peristome single, of 16 linear-lanceolate 2-cleft teeth, 
the divisions unequal, divergent. Lid conic-beaked. Inflorescence 
various. Frond-like plants; the leaves exactly 2-ranked, their 
proper lamina infolded-boat-shaped, producing from the keel an 
equitant blade which forms the principal portion of the leaf. 
(Name from fissus, split, and dens, tooth ; alluding to the cleft teeth 
of the peristome.) 
* Fruit terminal. 
F* Ity^Uinus, Wils. & Hook. Stems erect, simple; leaves 
oblong, acute, loosely reticulated, hyaline, nerveless; capsule erect, 
ovate ; lid conical-pointed ; calyptra mitriform, entire at the base. 
Damp earth in shady woods, Cincinnati, Ohio. — A very rare plant, 
2"-3" high. 
2. F. obtusifolius, Wils. Stems simple, erect ; leaves nearly 
oval, very obtuse, the nerve vanishing below the apex; capsule in¬ 
versely conical; calyptra cuculliform ; spores very large ; dioecious; 
sterile fl. terminal; plant 2" -3" high. Dripping cliffs, Cincinnati, 
Ohio.—This and the preceding were first discovered by the late T. 
G. Lea. 
3- F* exiguus, Sulliv. Stems simple, ascending; leaves oh- 
long-lanceolate, marginless, the nerve running to near the apex ; cap¬ 
sule oval, rather oblique ; lid conic, minutely beaked ; calyptra cucul- 
liform. Woods, upon stones in the channels of dried-up brooks, 
Ohio. — Dioecious; the sterile fl. terminal: plant 2" -3" high.— 
(Muse. Mleghan. No. 182.) 
4. F. mimitulus, Sulliv. Stems simple; leaves linear-lance¬ 
olate, margined by a transparent rather wavy border; capsule erect, 
oval; lid elongated-conic; calyptra cuculliform ; dioecious; the sterile 
