700 (100) HEPATICZ. (LIVERWORTS.) 
jeonaied at — sets with two spiral fibres. Spores large, rather angular. 
Antheridia in the saccate base of closely imbricated 2- 
jobiad Cae leaves. Stem-leaves deeply and unequally 2-lobed. Amphi- 
gastria large, decurrent. (Name formed of padds, bald, and Onn, capsule; the 
elaters falling away from the valves 
platyphylia, Dumort. Stems rp iti or ame SO; 
detent ‘ale of the leaf roundish-ovate, the basal margin more or less undulate ; 
the ventral lobe smaller, oblique, heart-oval, margins reflexed ; simphigas astria 
round-obovate with reflexed margins ; mouth of perianth nearly entire. — Trees 
and rocks, common; a large and variable species. (Tab. VIII.) (Eu 
2. MI. porélia, Nees. Stems 2-3-pinn nate (ata! long), the forked 
branches divergent; leaves distantly placed; the dorsal lobe oblong-ovate, ob- 
se; the ventral much smaller, appressed to the stem, oblong, flat; amphi- 
gastria quadrate; mouth of the perianth crenulate.— Stones and roots of trees 
subject to inundation. (Eu.) 
taugénsis, (n. sp.) Much like No. 2, but a smaller and 
more ieilaaed cok pe ee fascicles ha rootlets springing from the base of the 
amphigastria, and t rsal lobe of the leaf slightly repand-dentate ; foliage 
light <i no fruit seen. A Soteig adhering to decayed logs; 
banks of the Watauga River, North Carolina. (M. porella, var.? Muse. 
Alleghan. No. 265.) 
32. RADULA, Nees. (Tab. VIL) 
Fructification terminal on short branches, or in a fork. Involucral leaves 2, 
deeply 2-lobed. Perianth compressed or nearly terete; the mouth dilated. Ca- 
lyptra pear-shaped, persistent, opening below the apex. Capsule oval. Elaters 
attenuated at both ends, with two spiral fibres. Spores large, globose. Inflo- 
rescence moneecious. Antheridia in the ventricose base of minute perigoni 
leayes. Stem-leaves 2-lobed, the small inflexed ventral lobe producing rootlets. 
Am air ggeeaine none. (Name from padadds, pliant, because these are mostly 
flaccid plants.) 
1. BR. complanata, Dumortier. Stems flat, irregularly and se Seg 
pinnately branched, flaccid; leaves imbricated; dorsal lobe roundish; the ven- 
tral much smaller, triangular-ovate, appressed ; perianth oblong, comprested, 
the mouth truncate and entire.— A large pale-green species; growing in orbic- 
ular patches on the bark of trees, &c. (Eu.) 
2. KR. obcénica, Sulliv. Stems indeterminately branched; leaves dis- 
tantly placed; dorsal lobe obovate-roundish, pastime perianth clavate-obconic, 
the mouth obliquely truncate and entire. (R.complanata, var.? Musc. Alleghan. 
No. 260.) — Trees, Cedar swamps, Ohio. Meek smaller than the last; well 
marked by the shape of its perianth. (Tab. VII.) 
_R ens, Nees. Stems rigid, divaricately fork-branched ; leaves 
imbricated ; dorsal lobe roundish, jetties nt, the ventral lobe with an inflexed 
apex ; perianth elongated funnel-form, the mouth entire. — Old logs, &e., Alle- 
ghany Mountains. 
