AN ENUMERATrON OF CITLTIVATED PEENS. 



125 



50. GYMNOGBAMMA, 



Vernation fasciculate, erect. Fronds pinnate, bipinnatifid, 

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



Genus 50. — Portion of mature&ond, upper side. No. 1. 

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



Be- 



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

 becoming confluent, naked. 



§ 1. Nemogram/ma. Fronds pirmate or hipirmate, villose. 



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



Sw. ; Sehk. Fil. tt. 17, 21. — Tropical America. 



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



Exot. t. 13. Hemionitia tomentosa, Badd. Fil. Bras. 

 1. 19. — Tropical America. 



§ 2. Trismeria, Fronds pinnate; pirnice M-irifoUate ; seg- 

 ments Unear, covered with white or yellow farina. 



3. G. trifoliata, Desv. ; Sook. Oard. Ferns, t. 4 ; Lowe's New 



Ferns, t. 31. Aorostichum trifohatum. Limn. ; (Plum. 

 Fil. 1. 144 ;) 8chk. Fil. tt. 3 et 22. Trismeria argentea 

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

 Tropical Anjerica. 



§ 3. Ceropteris, Fronds Tn-iripvrmatijid or multifld, covered 

 with wascyfa/rina on the under side. 



4. G. Calomelanos, Kaulf.s Hook. Gen. Fil. t. 37; Hooh.Oard. 



Ferns, t. 50. Acrostichnm Calomelanos, iiim.,- Flum. 

 Fil. t. 40 ; Schk. Fil. t. 5; Lamg. et Fisch. Ic. Fil. t. 3. — 

 Tropical America. 



6. G. Tartarea, Desv. Acrostichum Tartareum, 8w. — Tropical 



America. 



