AN ENUMERATION OP CULTIVATED FEENS. 325 



50. GYMNOGRAMMA, Desv. 



Vernation fasciculate, erect. Fronds pinnate, bipinnatifid, 

 or multifid, rarely simple, smooth, villose, or farinose, from a 



Genus 59. Portion of mature frond, upper side. No. I. 



few inches to 2-3 feet high. Veins forked ; venules free. Ifc- 

 ceptades medial, elongated. Sori linear, simple, or forked, often 

 becoming confluent, naked. 



1. Neurogramma. Fronds pinnate or lipinnate, villose. 



1. G. rufa, Desv. ; Lowe's Ferns, 1, t. 6 A. Hemonitis rufa, 



Sw. ; Schk. Fll. tt. 17, 21. Tropical America. 



2. G. tomentosa, Desv. ; Lowe's Ferns, 1, t. 6 B ; Hook. Fil. 



Exot. t. 13. Hemionitis tomentosa, Radd. Fil. Bras, 

 t. 19. Tropical America. 



2. Trismeria. Fronds pinnate; pinnce bi-trifoliate ; secj* 

 mcnts linear, covered with white or yellow farina. 



0. G. trifoliata, Desv. ; Hook. Gard. Ferns, t. 4 ; Lowe's New 

 Ferns, t. 31. Acrostichum trifoliatum, Linn. ; (Plum. 

 Fil. 1. 144 ;) Schk. Fil. tt. 3 et 22. Trismeria argentea 

 et aurea, Fee, Gen. Fil. t. 14 A. West Indies and 

 Tropical America. 



3. Ccroptcris. Fronds bi-tripinnatifid or multifid, covered 

 with waxy farina on tlie under side. 



4. G. Calomelanos, Kaulf.; Hook. Gen. Fil. t. 37; Hook. Gard. 



Ferns, t. 50. Acrostichum Calomelanos, Linn.; Plum. 

 Fil t. 40 ; Schk. Fil. t. 5; Lang, et Fisch. Ic. Fil. t. 3. 

 Tropical America. 



5. G. Tartarea, Desv. Acrostichum Tartareum, Sw. Tropical 



America. 



