CHAKACTEES 01? TRIBES AND GENERA. 281 



(Sw.) (v V.) ; M. frigida (Lind.) (v v.) ; M. Szovitzii 

 {Flsch. and Meyer). 



This is the only species native of the E. hemisphere, 

 being- found in Italy, Dalmatia, Western Asia, and the 

 Himalayas . 



157. — Oejiopteris, /. Sm. 

 Casscheera s/i., Hook. Sp. Fil. 



Vernation sarmentose. Fronds 1 to IJ feet long, pinnate, 

 smooth, coriaceous ; pinnaa 2 to 3 inches long, linear, 

 petiolate, deeply cut into numerous quadrangular concave 

 lobes, not exceeding 1 line in breadth, which are incurved, 

 and oppositely connive over the rachis, forming moniliform 

 pinnas. Veins fi-ee. Sjjorangia terminal, few, forming a 

 single sorus seated in the hollow of each lobe, the margins 

 of which are indusoid. 



Type. Casseheera (/leichenioides, Gardn. 



Obs. — This genus is founded on a peculiar and remark- 

 able Fern, originally discovered in Brazil by Dr. Gardner, 

 and described in Vol. VI. of Hooker's " Icones Plantarum," 

 under the name of Gassiheera gleichenioides, in which genus 

 it is retained in Hooker's " Species " and " Synopsis Fili- 

 cum," but as it always appeared to me not naturally related 

 to the tyj^ical species of Casseheera, I therefore deem it best 

 to separate it as a 'distinct genus. In so doing I, how- 

 ever, find it difiicult to determine its position in this 

 arrangement, but its small concave indusasform lobes, con- 

 taining the sporangia, seems to indicate aflfinity with MyrL 

 opteris. 



Sp. 0. gleichnioides {Casseheera gleichenioides, Gard, ; 

 Hoolc. Ic. PL, t. 507). 



Native of Diamond district, Brazil. 



