8e HEPATICA. (LIVERWORTS.) 
Suporper Il. MARCHANTIACEZX. 
Frondose and terrestrial perennials, tae beneath with imbricating 
colored scales, and numerous tubular radicels tuberculate within ; recepta- 
ele raised on a fete springing from the mie of the frond (also from 
the back, in No. 12), capitate or radiate, bearing from the under side pen- 
dent calyptrate Bula which open variously, but are not regularly 
4-valved: elaters with two spiral fibres. 
5. MARCHANTIA, L. Broox-Liverworr. (Tab. 20.) 
receptacle radiated. Anvolucres alternate with the rays, 2-valved, 
“ e . tra opening at 
the apex, persistent. Capsule globular, pendulous, exsertly pedicelled, dehiscing 
at ag apex mide several revolute segments. Spores smooth. Elaters long, slen- 
an ated at each end. Inflorescence diccious. Sterile reeeptacle 
poduncled, shila like, lobed or rayed ke on the upper surface by the sum- 
mersed antheridia. Lentil-shaped gemms in cup-like receptacles 
on the back e the frond. Frond expanded, Atha with a broad diffused mid- 
nb. (Named after Nicholas Marchant, a French botanist.) 
1. - polymorpha, L. Fertile eee deeply divided in a eer 
; the eo 8-10, terete.— Shaded and moist places; very com 
a 20.) a 
2. MI. disjiimeta, Sulliv. (Mem. Amer. Acad. 1, ¢. p. 63, t. 3.) Fertile 
receptacle “pat radiately 7-9-lobed; the lobes cuneate, sigsisinsns on the 
outer margin; sterile receptacle digitately lobed: about the siz _L— 
Springy places, banks of the Alabama River, near Clairbourne : Wine: in May. 
6. PREISSIA, Nees. (Tab. 20.) 
Fertile receptacle hemispherical, 2-4-lobed, with as many rib-like rays alter- 
nating with and shorter than the lobes. Involucres attached to the under side of 
mpanulate, angular, uncq 
inet. "cial ge sagen dehiscing by an 5 seine a isa 
tube Elaters orescence dicecions, rare neeci An- 
ec pneu in puselaer peltate Sep Prond nt oily foe, 
ed for L. 
increasing by joints from the apex. (Name rman botanist.) 
1. P. commutata, Nees, Fertile aE ‘iui ponies 6 the 
prominent keel-like rays; capsule conspicuous, dark p — Shaded, moist 
8 
places, Niagara Falls (Carey), Lake Superior (Loring), Pi (Tab. 20.) (Eu.) 
7. DUMORTIERA, Nees. Harry Liverworr. (Tab, 20.) 
Fertile receptacle convex, 2-8-lobed. Involucre 1 -fruited, opposite to and 
connate with the lower surface of the lobes, horizontal, oblong, opening by @ 
vertical slit at the outerextremity. Perianth none. Calyptra obovate, rupturing. 
