AN ENUMERATION OF CULTIVATED FERNS. 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. I. 



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. 105; Hook. Gard, 

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

 serrulata, 8w. ; SchTc. Fil. t. 7 ; Hook. Exot. Fil t.78. 

 Polypodium serrulatum, Hetten. West Indies and 

 Tropical America. 



2. Gymnogrammece. Fronds pinnate or bi-tripinnatifid 

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

 farinose. 



49. LEPTOGRAMMA, /. 8m. 



Vernation fasciculate, erect or decumbent. Fronds bipinna- 

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

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

 Sporangia in some species pilose. 



