POLYPODIACEzE. 



25 



itself reflexed, and the reflexed portion bears nearly circular or 

 kidney-shaped masses of thecae. 



The genus is named from the Greek word for dry, as the 

 frond cannot be wetted even when plunged beneath water. 

 This is one of the most elegant and delicate of the Fern 

 tribe, and it is fortunate that several will bear cultivation 

 in the greenhouse. A. reniforme is a native of Madeira, 

 and has its fronds simple, kidney-shaped^ and the edges 

 notched ; it has long been known in this country : pedatum, 

 from Canada ; puhescens, kispidulum, assiniile, and formomm 

 are from Australia ; JEUiqpicum is from the Cape ; cuneatum 

 from Brazil, is generally cultivated in the hothouse, but it 

 will also flourish in the greenhouse ; the whole genus how- 

 ever is considered as prospering best in a hot atmosphere, 

 and though some are hardy, they are quite different plants 

 when subjected to the climate of the stove. 



DAYALLIA. (Hare's-foot Pern.) 



Gen. Char. {Cryptogamia Filices.) Sori roundish, nearly termi- 

 nal and marginal, distinct ; indusium superficial, attached in- 

 wards, and opening outwards. 



Named after a Mr. Davall, a Swiss botanist. D. Cana- 



