J Ob FERNS : BRITISH AND FOREIGN. 



63. MENISCIUM, Schreb. 



. Vernation fasciculate and decumbent, or uniserial and par- 

 men tose. Fronds pinnate, rarely simple, 1-8 feet high. Pri- 

 mary veins costseform, pinnate ; each opposite pair of venules 



Genus 63.— Portion of mature frond. No, 4. 



angularly or arcuately anastomosing and sporangiferons, pro- 

 ducing from their junction an excurrent, free, sterile vun'et. 

 Receptacles medial, linear, continued across the junction cf the 

 venules, forming arcuate, transverse sori. Sporangia in some 

 species pilose. 



* Fronds simple. 



1. M. simplex, Hock. Lond. Joum. Hot. v. 1, t. 11; Hook. Fil. 



Exot. t. 83. — Hong-kong. 



2. M. giganteum, Metten.; Hook. Sp. Fil. 5, p. 163. — 



Tropical America. 



** Fronds pinnate, 



3. M. triphylltun, Sw. ; Hook, et Grev. Tc. Fil. i. 120 ; Kwnze, 



Fil. t. 52. — India, Ceylon. 



4. M. palustre, Sadd, Fil. Bras, t 20; Ecok. Gen. Fil. tAO; 



Lowe's Ferns, 2, r. 45. — Brazil. 



