AN ENUMERATION OP CULTIVATED FERNS. 



100 



Hemionitis citrifolia, Hooik. Sp. Fil. West Indies 

 and Tropical America. 



2. Polytotryce. Vernation generally uniserial, distant or 

 contiguous. Fronds pinnate or bi-tripinnate, rarely flabellate, 

 segments adherent or articulate with the rachis. Veins free or 

 combined at the margin, or anastomosing in various ways. 



* Veins free. 



t Segments adherent. 



33. RHIPIDOPTEBIS, Schott. 



Vernation uniserial; sannentum slender, filiform. Fronds 

 distant, 3-6 inches long, the sterile flabelliform, entire, bi-tri- 



Genus 33. Fertile and barren fronds. No. 1. 



lobed or dichotomously multifid. Veins flabellately forked, free. 

 Fertile frond subrotund, entire or bilobed, sporangiferous on the 

 tinder side. 



