C84 hepatic^:, (liverworts.) 



2. B. ISeyi'iclliaaia, Ilampe. Frond oblong-linear, thickened and bi- 

 fid at the apex, narrowly channelled above, dark purple beneath ; the margins 



entire, ascending. — Tennessee. 



3. fit. biPui'ca, Hoffm. Frond suborbicular, pale-green; its divisions 

 wedge-shaped, 2-lobcd at the apex ; lobes spreading, dotted, broadly channelled 

 above, purplish beneath, the thickened margins ascending. — "North America." 

 ( G. L. Sf N. Syn. Hepat. p. 600.) (Eu.) 



# # Frond with large air-cavities : terrestrial or aquatic. 



4. K. iiatasis, L. Frond inversely heart-shaped, channelled above (3"- 



5" broad), clothed beneath with long pendent rootlets in the form of linear-lan- 

 ceolate, serrate, purple fringes ; capsules in two rows, lengthwise of the frond. 



— Floating on the surface of stagnant water. (Tab. 20.) (Eu.) 



5. K. ii ill tuns, L. Frond radiately expanding (I' or more in diameter) ; 

 divisions narrowly linear, repeatedly forking, nearly membranaceous ; at the 

 apex thickened, emarginatc and cavernous ; capsule protuberant from the lower 

 surface of the frond. — Floating on stagnant water. (Eu.) 



C. K. Ii5t£scesis, Schwein. Frond light-green, orbicular, l'-lj' in di- 

 ameter; the divisions 6-8, linear, 2-3 times forking, channelled above, obeor- 

 date at the extremity, thickened, with whitish obliquely-ovate and appressed 

 scales beneath. — On the ground, margins of ponds, &c. — Fruit unknown. — 

 (Sulliv. in Mem. Amer. Acad. n. ser. 4,/). 176, t. 4.) 



7. K. crystallina, L. Frond orbicular, 4" -6" in diameter; its di- 

 visions obcordate or linear-bifid, the margins subcrenate, the surface broken up 

 by deep pits, communicating with the air-cavities. — Damp ground. — Fruits 

 abundantly. (R. velutina, Hook. Tc. PL t. 149, is founded on sterile fronds of 

 No. 6, and fertile fronds of No. 7.) (Eu.) 



2. SPHilROCABPUS, Mich. Round-headed Liverwort. 



(Tab. 20.) 



Tnvolucrc sessile upon and continuous with the frond, obtusely conical or 

 pyriform, perforated at the apex, 1 -fruited. Capsule globose, closely invested 

 by the calyptra. Spores round, muriculate. (Anthcridia in folliculose bodies 

 on the surface of separate fronds. Wilson.) (Name composed of o-cpalpos, a 

 sphere, and Kapnos, fruit.) 



1. S. Micll&iii, Bellardi. Frond orbicular, 3" -6" in diameter, lobed, 

 entirely concealed by the numerous aggregated inflated involucres, which are 

 about f long, and 4-5 times larger than the capsules. (S. terrestris of authors.) 



— Cultivated fields, South Carolina, Curtis, Bavenel. (Tab. 20.) (Eu.) 



Suborder II. AWTHOCEBOTE^E. 



Terrestrial, frondose annuals, with the fruit protruded from the upper 

 surface of the frond. Perianth none. Capsule pod-like, mostly 1-2- 

 valved. Columella filiform. Elaters none or imperfect. 



