AN ENUMERATION OF CULTIVATED FEKNS. 



123 



pinnatifid below, sub-entire, and plicate or nearly plane above. 

 Veins simple, free, very short. Receptacles costal or medial, 



Genus 48. Plant natural size, and portion of frond enlarged. No. 1 . 



elongated. Sori oblong, confluent, mostly contiguous to and 

 parallel with the midrib, confined to the upper part of the frond. 



1. X. serrulata, Kaulf.; Fee, Gen. Fil. t. 10 B ; Hook. Gard. 

 Ferns, t. 44 ; Lowe's New Ferns, t. 42 A. Grammitis 

 serrulata, Sw. ; Schk. Fil. t. 7 ; Hook. Exot. Fil. t 78. 

 Polypodium serrulatum, Metten. West Indies and 

 Tropical America. 



2. Gymnogrammece. Fronds pinnate or H-tripinnatifid 

 or decompound, smooth, or generally pilose, tomentose, or 

 farinose. 



49. LEPTOG-RAMMA, J.Sm. 



Vernation fasciculate, erect or decumbent. Fronds bipinna- 

 tifid, 1-3 feet high. Veins of laciniae pinnate ; venules free. 

 Receptacles medial, elongated. Sori oblong or linear, naked. 

 Sporangia in some species pilose. 



