96 HEPATICE. (LIVERWORTS.) 
oblique, — rounded-obovate, entire or denticulate; perianth terminal. — 
- Grows with No. 
* Amphigastria tee - 3-cleft. 
3. P. porel loides, pipet Stems tia the — —— 
ing; leaves rather imbrica g bovate, 
the summit of the ste: d-denticulate , the others entire ; — pr 
the mouth pean ae Mosses, st the base of trees in swa 
. P. macréstoma, Sulliv. Stems prostrate, rooting copiously, 
branched; branches not ascending ; tocves nearly oval, horizontal, entire or 
slightly repand; perianth broadly obconic, the mouth compressed, margin re- 
pand; amphigastria lanceolate, 2-3-cleft.— Moist banks and decayed logs, 
Ohio. (Tab. 22.) 
5. P. Ludovicizna, Sulliv. Main branches ascending, flexuous, spar- 
ingly ramulose; leaves patent-divergent, semi-ovate, 2—3-dentate at the apex, 
their ventral margins decurrent and forming two parallel crest-like lines on the 
under side of the stem, the dorsal margins reflexed and entire, the ventral spinu- 
ata cans rans deeply 2-3-cleft, the segments ciliate-dentate. — 
ark of trees, Louisia 
6. P. unditta, Sulliv. Resembles the last; but is more rigid, with sim- 
ple branches ; leaves horizontal, triangular-ovate, obtuse, emarginate, or sparing- 
ly dentate at the apex, the dorsal margins reflexed and entire, the ventral repand- 
undulate and forming crest-like lines as in No. 4; amphigastria 2-cleft, the seg- 
ments dentate. — Shaded rocky banks of the Serienab River, ‘Gas rgia 
27. SARCOSCYPHUS, Corda. (Tab. 21.) 
Heatinn terminal 
Involucral leaves united nearly to the top into an 
oblong tube. Perianth 4-6-toothed, connate (except the teeth) with the inte- 
rior surface of the involucral leaves. Calyptra membranaceous. Capsule glo- 
Elaters with two spiral fibres, Antheridia in the saccate base of peri 
nial leaves. Stems erect, producing from their base runner-like rootlets. Stem- 
2-lobed. Amphigastria none. (Name composed of odp&, flesh, and 
exvidos, a cup; from the fleshy tubular involucre.) 
1. S. Ehrharti, Corda. Leaves erect-spreading, rather quadrate, em- 
bracing the stem by the broad base; lobes obtuse. — On mountains. — Plant of 
a firm texture, dark green or brownish-purple. (Tal b. 21.) 
28. GYMNOMITRIUM, Corda. (Tab. 21.) 
Fructification terminal. Involucral leaves 2-4, convolute, emarginate. Peri- 
anth none. Calyptra short. ee globose. Elaters with two spiral fibres. 
_ Antheridia sagan: axillary. Stem-leaves 2-lobed. Amphigastria none. 
(Name from yupvos, naked, se pirprov, a little cap; the calyptra not covered by 
a perianth.) 
_ iL G,. concinnatum, Corda. Stems erect, filiform, brittle, sparingly 
branched ; branches thickened at the apex, obtuse; leaves densely imbricated, 
ovate, with a narrow membranaceous margin. — Alpine regions of the White 
