688 (88) HEPATICA. (LIVERWORTS.) 
d in imbedded disks at th f the firm and rigid 
Keslea frond. ied for D. Grimaldi, an Italian hotuntizt. ) 
. barbifrons, Bischoff. Stems lin HEY ROM 3!'- 6! long, 
subdichotomous, 2-lobed at the apex, reverts: and pale green above, with 
whitish pores visible to the naked eye, — e beneath ; * pt ee palea- 
ceous at its base and apex; moncecious; staminate disks obcordate. — Iowa, 
Dr. Hor. (Tab. VII.) (Eu.) 
2. G. séssilis, n.sp. Agrees with the i appt that it is one 
smaller; the pores of the frond not visible ; ile receptacle (the ca 
sule being fully mature) sessile, and entirely ansaid oe a dense mass of p 
plish pales ; antheridia not seen. — Texas, C. Wright. 
11. FIMBRIARIA, Nees. Satu Lrverworr. (Tab. VL) 
Fertile receptacle hemispherical, concerns beneath, expanded at the margin in- 
tion splitting lengthwise into 8-12 — — dummies fear Calyp- 
ious. p glo cing by an irreg-- 
ular circumcissile line near the middle. en imurieste. Gin rather short. 
Inflorescence oo theridia immersed in the substance of the frond, 
not collected into disks. Frond much thickened in the middle, with a keel-like 
midrib. (Name 2 ein pret a fringe, alluding to the perianth.) 
€,2 
i; tenélia, Nee rond eclongated-wedge-shaped, nearly ne 
na eg at the end ‘6"- 10" sai 2!-4! wide), green above, purple on the 
margins and underneath. (F. mollis, Tay.) — Alleghany Mountains, in pres 
places. (Tab. 
2. F. paste Spreng. Much smaller than No. 1: remarkable for the 
very prominent papille of the fertile receptacle ; the lobes of the perianth co- 
hering at the apex into a short tube. — Tex as, C. Wright. (Eu.) 
12. PLAGIOCHASMA, Lehn. & Lindenb. (Tab. VL) 
Fertile receptacle arising from the back of the frond, deeply 2—4-lobed ; lobes 
ascending. Involucres very large, oe erect, 1-fruited, oppo- 
site to and concealing the minute lobes, 2-valved, dehiscing by a vertical slit. 
Perianth izontal 
rugose membrane. Elaters of medium length. Antheridia immersed in sessile 
disks at the end or in the middle of the frond. Frond rigid, thick. (Name 
composed of #Adytos, placed sideways, and xacpa, a chasm, referring to the lat- 
eral dehiscence of the involucre.) 
1. P. Wrightii, n. sp. Frond 5/-10" long, 1}! -2"' broad, continuous 
at the apex, glaucous above, with dark p urple scales beneath, the margins cren- 
ulate, ascending, convolute; involucres usually three; peduncle scarcely one 
line high, paleaceous at the apex and base. — Under overhanging rocks, along 
streams; Texas, C. Wright. (Tab. VI.) 
