AN ENUMERATION OE 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. ). 
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; Hoolc. Gard. 
Ferns, t. 44 ; Lowe's New Ferns, t. 42 A. Grammitis 
serrulata, Sw. ; Sclik. Fil. t. 7 ; Hook. Exot. Fil. t. 78. 
Polypodium serrulatum, Metten. — West Indies and 
Tropical America. 
§ 2. Gymnogrammece. Fronds pinnate or bi-tripinnatifid 
or decompound, smooth, or generally pilose, tomentose, or 
farinose. 
49. LEPTOGBAMMA, J. 8m. 
Vernation fasciculate, erect or decumbent. Fronds bipinna- 
tifid, 1-3 feet high. Veins of lacinias pinnate ; venules free. 
Receptacles medial, elongated. Sori oblong or linear, naked. 
Sporangia in some species pilose. 
