MUSCI. (MOSSES.) (41) 641 
3. A. crispum, T.P. James. More robust than either of the foregoing ; 
ste imple, lower leaves small, somewhat spatulate; the upper much larger, 
r,-the costa p estar scarcely lamellate ; areolz rather large, hexag- 
onal-rotu al: le ob ng, erect-cernuous, its mouth ample ; wey of 
the aren witty short, somewhat irregular; pedicel stout, red :’ diceciou 
B of small streams, New Jersey, James. — A very distinct species. 
44. POGONATUM, Beauv. Harre-cap Moss. (Tab. II) 
Calyptra cuculliform, very hairy ; the hairs forming a dense mat, covering the - 
whole capsule. » Operculum rostellate from a convex base. . Inflorescence dic- 
cious : male ‘flower cup-shaped. — Mode of growth as in Atrichum ; leaves more 
rigid, spré ading from a sheathing base, lanceolate, the costa below narrow, above 
very broad and‘covered with numerous crowded lamella. — (Name from moyor, 
a beard; from the hairy calyptra. 
ems extremely short. 
1. P. brevicatile, Bad. Stems 2-3! high; leaves 
pressed, the lower ovate-acute, the upper narrowly lanceolate from a faded been 
erose-denticulate above ; capsule cylindrical, erect ; operculum shortly yostellata; 
calyptra whitish. — Moist clayey banks, Eastern States and westward. — The 
ground around is always covered by a green stratum of confervoid filaments. 
2. P. brachyphyllum, Michx. Much like the last; stems nt 
leaves oval-oblong, obtuse, entire ; capsule oe cernuous; calyptra bro 
— On the ground, road-sides, &c., Southern Sta 
%* Stems elongated. (Alpine i Sd 
rni etnias Brid. Stems divided above; leaves lanceolate from 
ened on their borders; capsule cylindrical, the surface granulated. — White 
Mountains, New Hampshire. — Plant 2/- rine (Tab. I.) (Eu.) 
4. apillare, nasty Very like the preceding, but a smaller plant ; 
leaves oa approac spatulate, pointed, more loosely placed on the 
stem; pedicels more ap rostrum of the operculum rather flexuous ; teeth 
of the peristome more linear, their basal membrane conspicuously emergent. — 
White Mountains, New Hampshire 
5. P. alpinum, heme Stems much elongated, fastigiately branched 
amellae 
above ; leaves iar atet. from a long sheathing base, serrate ; oO 
the costa gradually thickened at their margins ; capsule inert or a? oval- 
Larger 
oblong, the sites smooth. — White Mountains, New Hampshire 
than 
45. POLY TRICHUM, Bri.  Hare-car Moss. (Tab. IIL) 
Calyptra and operculum as in the last. Capsule 4- 6-sided, oblong or ovate, 
with a discoid caer, erect (when is horizontal), lo toa ag es asc 
stome single: teeth 64 : — otherwise as in Atrichum ; with the infl 
mode of growth of Pagal soy Mom csoad the largent of thd 
