Hepaticce of North America. 105 



short, strongly cristate-undulate, obtusely many-lobed; inner 

 involucre terminal, elongate subcylindric, naked, the apex sub- 

 plicate, the mouth minutely ciliate. ( Diplophyllum politum 

 Dumort. ) 



Hab. In a peat bog near Closter, N. J. (Austin). (Eu.) 

 Bib.- -Syn. Hep. p. 122 ; Hep. Europ. p. 50 ; Pro. Phil. Acad. 1869, 

 p. 220. 



Exsic. Hep. Bor.-Amer. No. 46. 



23. J. inflata Huds. Stems procumbent or ascending, 

 loosely radiculose, branching; leaves semivertical, elliptic-sub- 

 rotund, unequal-sided, unequally bilobed, the sinus and lobes 

 obtuse; involucral leaves like those of the stem; inner involu- 

 cre terminal, at length dorsal, longer than the outer, oval or 

 pyriform, smooth, the mouth connivent; capsule oblong. 

 (Gymnocolea inflata Dumort.) 



. On sterile ground and on rocks, N. J. (Austin) and in high 

 mountains northward to Greenland ( Vahl). (Eu.) 

 Bib. Syn. Hep. p. 105 ; Hep. Europ. p. 65. 

 Delin. Brit. Jung. t. 38 ; Ekart, t. Ill, f. 23. 

 Exsic. Hep. Bor.-Amer. No. 34. 



24. J. SullivantisB Aust. Stems closely creeping, flexu- 

 ous, caespitose; leaves subovate, little wider than the stem, 

 whitish, erect-spreading or somewhat horizontal, somewhat 

 concave or plane, much narrowed at the base, bifid | f their 

 length, the sinus obtuse, the laciniae very acute, divergent or 

 connivent; involucral leaves 3, larger, erect, 2-3-cleft, one of 

 them narrower, amphigastroid ; inner involucre terminal on a 

 short ventral branch, obovate-oblong, strongly plicate, at first 

 triquetrous, at length terete, the mouth deeply about 10-cleft 

 with the same number of folds; the laciniae subconnivent, ser- 

 rate or subentire. 



Hob On rotten wood, O. (Suttivant), 111. (Hall). 

 Bib.Torrey Bull. Ill, 12. 



JJ Involucral leaves merely toothed. 



25. J. excisa Dicks. Stems subsimple, short, closely 

 creeping, somewhat rigid; leaves semivertical, erect-spreading, 

 subrotund, pellucid, inflexed at the base anteriorly, the sinus 

 deep, obtuse, the excised laciniae straight, acute; involucral 



