712 JUNGERMANNIACE^. (SCALE-MOSSES.) 



4. C. bicuspidata, Dumort. Prostrate or assurgent, cespitose, usually 

 greenish or reddish, with runners; lower leaves small and distant, the upper 

 larger, round-ovate, cleft nearly to the middle, the lobes ovate-lanceolate and 

 acute, the lower lobe narrower and acuminate; cells large, pellucid; monoe- 

 cious ; involucral leaves about 3 pairs, the innermost nearly three times as 

 long as the outer, cleft ^ their length ; perianth four times as long as the leaves, 

 linear-prismatic or fusiform, thin, denticulate or ciliate ; capsule cylindric- 

 obloug; spores purple. (Jungermannia bicuspidata,/..) — On the ground, 

 mountains of N. Eng., N. Y., and N. J. (Eu.) 



5. C. eurvifolia, Dumort. Slender, rarely forked, without runners, 

 greenish, reddish, or often purple ; leaves imbricate, ascending, obovate, con- 

 cave, semicordate at base. Innately bifid below the middle, the lobes incurved 

 or hooked ; cells small, quadrate ; monoecious or dioecious ; involucral leaves 

 complicate, the lobes subovate, spinulose-denticulate ; perianth large, rose- 

 purple, triquetrous, the wide mouth ciliate ; calyptra thin ; capsule oblong- 

 globose. (Jungermannia eurvifolia, Dicks.) — On rotten logs in swamps, etc. ; 

 common. (Eu.) 



* * Underleaves iisuall// present; leaves rarely suh imbricate. 



6. C. fluitans, Spruce. Stems 2-3' long, loosely creeping, with short 

 thick runners ; leaves large, ovate-oblong, lobed to near the middle, the lower 

 lobe larger, lanceolate, obtuse; cells large, mostly hexagonal; underleaves 

 linear, appressed ; dioecious ; involucral leaves cleft to the middle ; perianth 

 oval-cylindric, nearly entire ; calyptra short, pyriform ; capsule oblong ; spores 

 small, minutely tuberculate ; antheridia globose, pedicelled, solitary in the 

 axils. — In bogs, on mosses or partly floating; rare. (Eu.) 



§2. CEPHALOZIELLA. Perianth S - e-anrjled ; leaf-cells small (14-20^ 

 broad) ; plants small^ often minute ; underleaves present in n. 9. 



7. C. divaricata, Dumort. Sparingly branched, without runners; 

 leaves very small, cuneate or round-quadrate, the ovate-triangular lobes acute ; 

 cells pellucid or subopaque ; involucral leaves larger, the lobes acute, denticu- 

 late ; perianth linear or narrowly fusiform, prismatic, denticulate or subeutire ; 

 capsule oblong-globose, long-exserted. (Jungermannia divaricata, Smith.) — 

 Dry rocks and sand, pine barrens of N. J., and northward. (Eu.) 



8. C. Macounii, Aust. Slender, much branched, dark green; leaves 

 scarcely broader than the stem, wide-spreading, bifid with a broad or lunate 

 sinus, the broad-subulate lobes mostly acute ; cells subquadrate, somewhat pel- 

 lucid ; dioecious ; involucral leaves appressed, 2 - 3-lobed, irregularly spinulose ; 

 perianth small, whitish, obovate or ovate-fusiform, obtusely 3-angled, setu- 

 lose or ciliate. — Rotten logs, mountains of N. Eng., and northward {Austin, 

 Macoun). 



9- C. Sullivantii, Aust. Stems 3 - 6" long, fleshy, rootlets numerous ; 

 fertile branches suberect, clavate ; leaves imbricate, often narrower than the 

 stem, subquadrate-ovate, more or less serrate, the sinus and lobes subacute ; 

 dioecious ; involucral leaves 3, erect, free ; perianth broadly oval or subobovate, 

 obtusely and sparingly angled, the apex slightly plicate, the mouth connivent, 

 dentate, sometimes narrowly scarious ; capsule oval. — On rotten wood, N. J., 

 Ohio, and 111. ; rare. Our smallest species. 



