112 CHARACTERS OF TRIBES AKD GENERA. 



27. Lepictstis, /. Sm. (ISil). 

 Marginaria sp. Bory ami PresJ : Polypodium sp., auct. and 



Eool-. Sp. Fil. 



Surculum short and rig-id ; slender. Fronds pinnatifid, 

 6 to 18 inches hig-h, densely covered with round or 

 elong-ated fringed scales. Veins pinnately forked, anasto- 

 mosing-, lo-s\'er exterior venules free. Eeceptades punctiform, 

 terminal on the free venules in the costal areoles, immei'sed. 

 Sori protrading throug-h the dense scales, transverse 

 ■aniserial. 



Type. PohjpoJiiim iiicanum, Linn. 



Illust. J. Sm. Ferns, Brit, and For,, fig. 6. 



Obs. — In venation and position of the sori this genus 

 agrees -ivith GoniopMcbiiiin-, but differs in the fronds being 

 densely covered vvith elongated fringed scales, through 

 ■which the sporangia protrude in a manner analogous to 

 being contained within a calyciform indusium. In general 

 habit the species agree in the squamose nature of the 

 fronds, which indicates its natural affinity to be with 

 Pohipodium macrocarpum and P. niadrensea. 



Species. L. incana {Sio.) (v v.) ; L. lepidopteris (L. etF.) 

 (v v.) ; L. squamata (Linn.) (v v.) ; L. ragadiolepis (Fee) 

 (vv.) 



Natives of West Indies and Tropical America, extending 

 to south of the United States to South of Brazil. 



28, Pleopeltis, H. et B. (1810). 



Pohjpodtum sp., ancl. ; HooJc. Sp. Fil. 



Surndum elongating ; slender. Fronds simple, sinuose 

 or pinnatifid, 4 to 12 inches long, opaque, squamiferous, 

 rarely smooth. Vi^ins more or less obscure, arcuately anas- 



