AND HEPATICOLOGY OF NORTH AMERICA. 63 



silis is dioecious, witli the aiitheridia embedded in the upper and 

 concave surface of elongated tapering and deflexed processes, which, 

 in clusters of 2-4 together, proceed from the margin of the frond. 

 The capsule, in its normal state, is borne upon a long exserted pe- 

 dicel ; and even in cases where the capsule is apparently sessile 

 (whence the specific name), the pedicel is of the usual length, but 

 is folded up within the calyptra, whose thick substance resists its 

 protrusion. 



This species belongs to the Southern States ; it fruits copiously 

 in the cypress swamps around New Orleans, always growing on 

 decayed logs. It is occasionally found as far north as in central 

 Ohio, where, however, it requires artificial protection to mature its 

 fruit. 



Tab. v.— Fig. 1. Female plant, natural size. Fig. 2. Male plant, nat- 

 ural size. Fig. 3. Portion of a frond, with margbal processes or male recep- 

 tacles. Figs. 4, 5, 6. Male receptacles. Fig. 7. Portion of a frond, with 

 calyptra, pedicel, and capsule. Fig. 8. Young fruit. Fig. 9. Transverse 

 section of a calyptra. Fig. 10. Upper part of a calyptra. Fig. 11. Valves 

 of the capsule in a dry state. Fig. 12. The same in a moist state. Fig. 13. 

 Upper part of a valve of the capsule. Fig. 14. Elaters and spores. Fig. 15. 

 Portion of a valve of the capsule. Fig. 16. Transverse section of the same. 

 Fig. 17. Transverse section of the frond. The analyses are more or less 

 highly magnified. 



7. Among the most remarkable of North American Hepatics 

 is one found near Salem, in North Carolina, by the late Mr. 

 Schweinitz, which he made known in his Specim. Fl. Amer. Sept. 

 Crypt. (1821), under the name of Targionia orbicularis. Subse- 

 quently, he proposed to establish for it his new genus Carpobolus, 

 of which he gave a detailed description and figure in the Journ. 

 Acad. Nat. Sci. Philad. (1822). 



