HEPATIC^, (liverworts.) (85) 685 



3. ANTHOCEROS, Mch. Hoened Liveewoet. (Tab. VI.) 



Involucre tubular. Calyptra conical, witb a subsessile stigma. Capsule 

 nan-owly linear, siliquEeform, 2-TalTed, exsertly pedicelled. Spores muriculate. 

 Elaters flexuous, tbe spiral fibres imperfect or none. Inflorescence monoecious : 

 antheridia dorsal, sessile in a cup-shaped involucre. — Erond orbicular-radiate, 

 lacerate, -witli immersed gemmge as in Notothylas. (Name formed of avdos, 

 a blossom, and Kepas, a horn ; from the shape of the involucre.) 



1. A. piinctatus, L. Frond deep green, 5" -8" in diameter, margins 

 plicate, crenate, the surface papulose-reticulated; involucre erect, cylindrical, 

 with a scarious and obliquely truncate mouth. — Wet slopes, sides of ditches, 

 &c. (Eu.) 



2. A. leevis, L. Larger than the preceding species ; surface of frond 

 smooth ; mouth of the involucre more broadly scarious. — In similar places. 

 (Tab. VI.) (Eu.) 



3. A. laciniatUS, Schwein. A still larger species ; the frond more la- 

 ciniated, its surface smooth : distinguished from No. 1 and 2 mainly by the 

 bilobed mouth of its involucre. — "Wet gravelly places, Southern States : form- 

 ing patches a foot or more in diameter. 



4. NOTOTHYIiAS, Sulliv. (Tab. VI.) 



Involucre a protusion of a portion of the upper stratum of the frond, opening 

 irregularly at the apex. Calyptra vanishing early. Capsule closely invested 

 by the involucre, oblong-ellipsoidal, subcompressed or ovate-cylindrical, slightly 

 pedicelled, either 2-valved from the apex half-way down, or rupturing ii-regu- 

 larly. Columella linear. Elaters wanting. Spores roundish, smooth. Inflo- 

 rescence monoecious : antheridia immersed in the frond. — Frond orbicular, 

 laciniate, papulose-reticulated, undulate-crisped at the margin, and with dark 

 green oval grains (gemmas) scattered within its substance. (Mem. Amer. 

 Acad. n. ser. 3, p. 64, t. 4. (Name formed of vStos, the back, and 6v\ds, 

 a purse or bag ; from the shape of the involucre and its position on the back of 

 the frond.) 



1. N. valvata, Sulliv. Frond 3" -8" wide; involucre horizontal-elon- 

 gated, tapering-deflexed ; capsule ovate-cylindrical, horizontal-incurved, 2-valved 

 by a dark-colored sutiu-e ; spores light yellowish-brown. (Muse. Alleghan. No. 

 289.) — Moist ground. Central Ohio. (Tab. VI.) 



2. N. melanospora, Sulliv. Capsule often without any suture ; colu- 

 mella with short hooked appendages ; spores dark brown, larger than in the 

 preceding, which in other respects it resembles. — Grows in similar localities. 

 (Muse. Alleghan. No. 290.) 



3. IV. orbicularis, Schwein., Sulliv. Involucre nearly erect; capsule 

 oblong-ellipsoidal, subcompressed, the suture evident or obscure : somewhat 

 smaller than the others. — On the ground, North Cai'olina, Schweinitz: Penn- 

 sylvania, Lesquereux. 



58 



