CHECKLIST OF THE FERNS. 319 
LIST OF ABBREVIATIONS USED IN THE CHECKLIST OF FERNS. 
A. Br. A, Braun, 
Adans. M. Adanson, 
Ait. W. Aiton, 
Angs. J. Angstroem. 
Bernh. J. J. Bernhardi. 
R. Br. Robert Brown. 
Dav, Geo, E. Davenport, 
Desv. N. A. Desvaux. 
Hoffm. G. F. Hoffman, 
Hook. W.J. Hooker. 
Huds. W. Hudson. 
Karst. Karsten. 
L’Her. C. L. L’Heritier, 
L. Linnzus. 
Mart, & Gal. Martens & Galeotti. 
Mett. G. Mettenius. 
Michx. A. Michaux. 
Muhl. G. H. E. Muhlenberg. 
Nutt. T. Nuttall. 
Sm. J. E. Smith, 
Sw. O. Swartz, 
Torr. J. Torrey. 
Underw. L. M. Underwood. 
Tuckerm. E. Tuckerman, 
Willd. K. S. Willdenow. 
