30 



ATHYRIUM FILIX-F(EMINA. 



pinnules, and a terminal larger joinnule. Pinnules varied in 

 size and form, being smallest near the apex, about fifteen or 

 sixteen j)airs on each frond. A dwarf delicate variety. The 

 illustration is from Mr. Barnes' frond. 



§4miM^i. 



i 



Fig. 311.— Shewing form of Frond. 312.— Middle pinnae. 



BiFiDUM, Lowe. (Figs. 311 and 312.) — Found near Edinburgh 

 in 1859. An interesting dwarf slender-fronded variety in the 

 ifiterrupfum section. Length of frond fifteen inches. In the 

 centre the rachis divides into two distinct fronds. The apices 



I 



