HEPATIC. (LIVERWORTS.) (89) 689 
Suporper IV. JUNGERMANNIACEZ. Scare-Mosses. 
Either frondose or foliaceous: leaves when distinct 2-ranked, and often 
with a third row of smaller ones (amphigastria) on the under side of the 
stem. Capsule on a cellular pedicel, dehiscent lengthwise into 4 valves 
I. Vegetation frondose (stem and leaves confluent in a frond). 
13. METZGERIA, Raddi. (Tab. VIL) 
ertile fructification arising from the lower surface of the midrib of the frond. 
Involucre 1-leaved, scale-like, at length ventricose and 2-lobed. Perianth none. 
Calyptra ascending, oblong-obovate, rather fleshy. —— — an 
ith one spiral fibre, adherent to the tip of the valves. Inflore 
antheridia 1-3, enclosed by a 1-leaved involucre on the under side of the mid- 
Ovate gemme aggregated on the attenuated tips of the linear frond: mid- 
“ib distinct. * Ontarned for J. Metzger, a German botanist.) 
1. Mi. furcata, Nees. Fronds linear, thin and membranaceous, forking 
or proliferous, with white pellucid hairs on the margins, and benea th on the 
midrib; calyptra hispid. — Hilly districts, on rocks and the bark of trees. (Tab. 
VIL) (Eu.) 
2, M. pubéscens, Raddi. Larger than the last, pubescent on both 
surfaces. — natin localities. (Eu.) 
14. ANEUWRA, Dumortier. (Tab. VIL) 
ructification arising from the under side near the margin of the frond. In- 
yolucre cup-shaped, very short and lacerate, or none. Perianth none. Calyp- 
cine 
rescence dicecious. Antheridia immersed iti the upper surface of receptacles 
proceeding from the margin of the frond; which is fleshy and destitute of a 
midrib (whence the name, from a privative, and vedpov, a nerve) 
1. Ae SéSSilis, Sprengel? Fronds irregularly lobed (1'- 2! long, 3-5" 
wide) ; involucre none; calyptra papillose at the apex; pedicel 9’-12!' long, 
sometimes folded upon itself and remaining within the calyptra, thus makin 
eras, Ohio; rare as high as lat. 40; very common in the Southe tates. — 
may not be Sprengel’s plant, the leaves of which are descri tall i having 
large oblong areol, and the calyptra as being smooth. (Tab. VIL.) 
2. A. pimguis, Dumort. Much like the last; frond more linear and 
ie involucre short and lacerate; sterile seomaticias 2-lobed, lobes obtuse. 
hagnum, in the Southern States (Schweinitz) ; and in Ohio. Fruit 
+ palmata, Nees. Fronds ustally crowded (2"-3" high), ager 
‘- 
tie palmately — oe divis ae saeasag som 
cepmng y; as oe &c. ; common. as 
58* 
