Hepaticce of North America. 115 



Hob. Wet rocks, Mts. of N. Eng. to N. J. and southward; also 

 Greenland. (Eu.) 



Bib. Syn. Hep. p. 7 ; Hep. Europ. p. 127 (sub Marsupella). 



Delin. Ekart, t. XI, f. 91. 



Exsic. Muse. Alleghan. No. 216; Hep. Bor.-Amer. No. 3b. 



** Amphigastria triangular-subulate. 



5. N. Lescurii (Aust.) Stems prostrate, copiously ra- 

 diculose beneath as well as the usually emarginate-bilobed 

 leaves; areolation lax; amphigastria entire or the uppermost 

 subdentate. (Alicularia Lescurii Aust. ) 



Hab.Wet rocks, Tallulah Falls, Ga. (Lesquereux, 1850). 

 Bib. Torrey Bull. VI, 18. 

 Exsic. Hep. Bor.-Amer. No. 5. 



XXXII. CESIA B. GR. 



Involucral leaves numerous, imbricate. Inner involucre 

 wanting. Calyptra immersed in the involucral leaves. Cap- 

 sule quadrivalved, coriaceous. Elaters bispiral, deciduous. 

 Leaves closely imbricate. Amphigastria wanting. (AcoLEA 

 Dumort.) 



1. C. concinnata B. Gr. Stems intricately branching, 

 thickened at the apex; leaves closely imbricate, ovate, the apex 

 bifld, with a narrow scarious margin. (Jungermania concin- 

 nata Lightf., Gymnomitrium concinnatum Corda, Acolea concin- 

 nata Dumort.) 



Hob. Alpine regions of White Mts., N. H. (Oakes). (Eu.) 

 Bib. Syn. Hep. p. 3 (sub Gymnomitrium) ; Hep. Europ. p. 122 (sub 

 Acolea). 



Delin. Brit. Jung. t. 3 ; Ekart, t. VIII, f. 63. 

 Exsic. Hep. Bor.-Amer. No. 1. 



