Moore — On the Mosses of Ireland. 
333 
ANALYSIS OF TRIBES AND GENERA. 
Tribe 1. Tetraphide^. 
Perennial or annual mosses, growing gregariously on dry banks or 
moist shady rocks ; stems slender, simple or dichotomous. Cap- 
sules pedicellate, oblongo- cylindrical, slightly reticulated ; opercu- 
lum slender, conico-elongated; calyptra mitriform, ribbed, lacerated 
at the base. Peristome of 4 teeth. Leaves ovate, lanceolate, or 
ovate- subulate, upper ones larger and more or less spreading; 
areolations roundish, or obtusely angular. Inflorescence monoicous. 
Genera. 
Calyptra mitriform, plicate, lacerated at base, 1. Teteaphis. 
Calyptra submitriform, large, nearly covering 
the capsule, 2. Tetkodoktium. 
Tribe 2. DicRANEiE. 
Small mosses with stems more or less robust growing in lax or dense 
tufts, the lower portion frequently matted together. Leaves lax or 
densely crowded, spreading equally, secund or falcate-secund, 
often rigid and shining with a silky lustre; alar cells at base 
frequently turgid and conspicuous. Fruit terminal on main stems or 
on elongated branches ; capsules entire or operculate. Peristome of 
the latter single, of 16 teeth, variously cleft, mostly to the middle 
or base into 32 filiform processes. 
Sub-tribe 1. BRUCHiEiB. Capsule without a deciduous lid. 
Calyptra cleft on one side ; leaves setaceous, 
pale green ; shining ; capsules nearly 
sessile among the perichsetal leaves, . 3. Pletjridiijm. 
Sub-tribe 2. Dicranoide^. Lid of capsule deciduous. 
a. Teeth of peristome 16. 
Genera. 
Calyptra multifid at base, teeth of peristome 
short, truncate, and fugacious, . . 4. Brachyodus. 
Calyptra cuculliform ; teeth of peristome, lan- 
ceolate acute, 5. Seligeria. 
Teeth of peristome, short, broad, and bifid. 
Calyptra not inflated, areolation of leaves 
nearly rectangular at base, , . .6. Dicranrlla. 
