694 (94) HEPATIC^, (liverworts.) 



8. J. barbata, Schreber. Stems procumbent, sparingly branched ; leaves 

 romidish-quadrate, 3 - 5-lobed, the sinuses obtuse and undulate ; lobes obtuse, 

 acute, or mucronulate, variously directed ; amphigastria (when present) broad, 

 entire or 2-toothed ; perianth angularly plaited to near the apex, the mouth den- 

 ticulate. — Hilly districts, on the ground, rocks, &c. : variable. (Eu.) 



9. J. micliauxii, "Weber. Stems ascending, flexuous by repeated inno- 

 vations from below the summit ; leaves crowded, erect-spreading, rather saccate 

 at base and quadrate, 2-cleft, the sinus narrow ; the lobes acute, incurved ; ex- 

 terior involucral leaves large, serrulate, the inner smaller ; perianth oval, rather 

 club-shaped, the obtuse apex plaited, the mouth fringed. — Alleghany Moun- 

 tains. (Eu.) 



10. J. incisa, Schrader. Stems prostrate, thick, rather flat, rooting co- 

 piously; leaves densely crowded, somewhat quadrate, waved, 2-6-cleft, the 

 segments unequal ; perianth oval or obovate, the mouth plaited, denticulate. — 

 Damp, shaded places, on the ground. — A small, pale green species. (Eu.) 



11 . J. intermedia^ Lindenberg. Stems prostrate, almost simple ; leaves 

 roundish-quadrate, 2-cleft ; the upper ones crowded into heads, and 3 - 4-cleft ; 

 involucral leaves 3 - 4-cleft, slightly serrate, connate at the base ; perianth short, 

 ovate-triangular, the mouth plaited, denticulate. — On the ground. — A small 

 species. (Eu.) 



* * * Leaves nearly orbicular, undivided; amphigastria different or obsolete. 



12. J. SCUtata, Weber. Stems procumbent; leaves half vertical, emar- 

 ginate-2-toothed ; the teeth straight and acute; involucral leaves 2- 3-toothed; 

 amphigastria large, ovate-triangul.ir, 1 - 2-toothed on the margin near the base ; 

 perianth obovate, the mouth plaited, denticulate. — Old logs, &c. — A minute 

 species. (Eu.) 



13. J. Schraderi, Martins. Stems creeping, flexuous ; leaves elliptical- 

 orbicular, ascending ; outer involucral leaves large, elongated, entire or emargi- 

 nate, spreading at the apex; the inner smaller, more or less laciniated; amphi- 

 gastria obsolete ; perianth oval-obovate ; the mouth plaited-lobed, its lobes 

 ciliate. (J. orbicularis, 3Iickx.?) — Decayed logs, &c. ; common. — Foliage 

 often dark purple. (Eu.) 



14. J. Taylori, Hook. Stems erect, nearly simple; leaves orbicular, 

 •with large areolie ; amphigastria broadly subulate ; perianth oval, compressed 

 at the mouth, truncate and 2-lobed. — Bogs; mountains of New England. — A 

 large species, with purple foliage. (Eu.) 



15. J. crentllata, Smith. Stems prostrate, branched ; leaves orbicular, 

 ascending, those towards the perianth larger and bordered by large marginal 

 cells ; perianth obovate, compressed-4-angled, the mouth much contracted, 

 toothed. — Margins of ditches. Mobile, Alabama. (Eu.) 



* * * * Leaves unequally complicate-2-lobed {i. c. folded together) : the involucral 

 ones 3 - b-cleft : perianth oblong, obtuse, plaited. 



16. J. exsecta, Sclimidel. Stems ascending; dorsal lobe of the leaves 

 small, acute; ventral lobe concave, acute or 2-toothed. — Boggy places, decayed 

 wood, &c. (Eu.) 



