128 FERNS : BRITISH AND FOREIGN. 



1-2^ feet long, smooth, contracted and fertile above, sterile 

 below; Sterile pinnules oblong, elliptical, oblique sub-cordate, 

 serrulate, 1-1 J inches in length. Veins forked ; venules free. 

 Fertile pinnules linear, 2-3 inches long, revolute, margin con- 

 niving and forming an universal indusium. Sporangia occu- 

 pying nearly the whole length of the contracted venules, 

 forming linear forked confluent sori. 



1. L. cordifolia, Lag. ; Hook. Sot. Mag. t. 5159. Cerato- 

 dactylis osmundioides, /. Sm. in Hook, et Bauer, Gen. 

 Fil. t. 36 ; Lowe's New Ferns, t. 30. Botryogramma 

 Karwinskii, Fee, Gen. Fil. t. 15 C. Allosorus Kar- 

 winskii, Kunze, Fil. t. 4 ; Hook. Ic. PI. t. 387-8 

 Mexico. Tr. 



** Veins anastomosing. 



3. Hemionitece. Fronds simple, pinnate or rarely lipinnate. 

 Sori more or less complete reticulated. 



53. DICTYOGRAMMA, Fee. 



Vernation uniserial, contiguous; sar- 

 mentum short. Fronds pinnate or bipinnate, 

 1-3 feet high, smooth; pinnae elliptical- 

 lanceolate, 6-10 inches long. Venation sub- 

 uniform, reticulated; areoles unequal, gene- 

 rally elongated, oblique. Receptacles super- 

 ficial. Sori linear, reticulated, naked. 



1. D. Japonica, Fee, Gen. Fil. t. 15 A. 

 Hemionitis Japonica, Tliunb. Gym- 

 nogramma Japonica, Hook. Sp. Fil. 



54. HEMIONITIS, Limn. 



Vernation fasciculate, erect, short. Fronds simple, cordate, 

 palmate orpinnate, smooth or villose. Veins uniform reticulated. 



