84 HEPATICE. (LIVERWORTS.) 
2. BR. Beyrichiima, Hampe. Frond oblong-linear, thickened and bi- 
fid at the apex, narrowly channelled above, dark purple beneath ; the margins 
entire, sortie — Tennessee. 
3. R. bifa Hoffm. Frond suborbicular, pale-green; its divisio 
“nbeicae: ae at the apex; lobes cig dotted, chopad peice 
above, purplish beneath, the hae ned margins aseending. — “ North America.” 
(G. L. & N. Syn. Hepat. p 
* * Frond with en air-eavities : terrestrial or aquatic. 
. BR, . Frond inversely heart-shaped, channelled above (3/7 - 
oy aa nro beneath with long pendent rootlets in the form of lincar-lan 
ecolate, serrate, purple fringes ; capsules in two rows, lengthwise of the frond 
— Floating on the surface of stagnant water. (Tab. 20.) (Eu.) ~ 
itans, L. Frond radiately expanding (1! or more in diameter) ; 
divisions narrowly linear, repeatedly forking, nearly membranaceous ; at the 
apex thickened, emarginate and cavernous ; capsule protuberant from the lower 
surface of the frond. — Floating on stagnant water. {(Eu.) 
6. R. lutéscens, Schwein. Frond light-green, orbieular, 1/-1}! in di- 
ameter ; the divisions 6-8, linear, 2-3 times forking, channelled above, obcor- 
date at the extremity, thickened, with whitish —. and appress' 
seales beneath. — On the gronnd, margins of ponds, &c. — Fruit an eaechoey _ 
(Sulliv. in Mem. Amer. Acad. n. ser. 4, p. 176, t. 4.) 
7. BR. erystallina, L. Frond orbicular, 4-6” in diameter; its di- 
visions obcordate or linear-bifid, the margins subcrenate, the surface Keoki up 
by deep pits, communicating with the sabi psnil — Damp ground. — Fruits 
abundantly. (R. velutina, Hook. Je. Pl. t. 149, is founded on sterile fronds of 
No. 6, and fertile fronds of No.7.) (Eu.) 
2. SPH EROCARPUWS, Mich. Rovunxp-neapep Liverwort. 
(Tab. 20.) 
Involucre sessile upon and continuous with the frond, obtasely con:eal or 
pyriform, perforated at the 5 ea nin bana Capsule sage closely invested 
hy the ealyptra. Spores round (Antheridia in folliculose bodies 
on the surface of separate sane a (Name ares: of opaipos, a 
sphere, and rapids, fruit.) 
1. S. Michélii, Bellardi. Frond orbicular, 3/-6" in diameter, pac 
entirely concealed by the numerous aggregated inflated involucres, which a 
about 3” long, and 4-5 times larger than the capsules. (S. terrestris of pero 
—Cultivated fields, South Carolina, Curtis, Ravend. (Tab. 20.) (Eu.) 
Sunorper Il. ANTHOCEROTEX. 
Terrestrial, frondose annuals, with the fruit protruded from the upper 
surface of the frond. Perianth none. Capsule pod-like, mostly 1-2 
valved. Columella filiform. laters none or imperfect. 
