POLYPODIUAi 



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the Latin luinie, PohjiJudium (Gr. pdys, many, j;oJ«, feet), 

 given it by Linnaeus in allusion to its numerous creeping 

 underground stems. As there are many species, ours is 

 named P. vidgdre, the Common Polypod. 



Scientific Terms defined in this lesson : Aerial. Fibrils. Fork- 

 veined. Frond. Mid vein. Pinna (plur. pinnae). Pinnatifid. Pinni- 

 veined. Protliallus. Rhizome. Root-stock. Sorus (plur. sori). Spo- 

 rangium (plur. sporangia). Stipe. Subterranean. Veinlet. Veinulet, 

 Venation. 



ANALYSIS OF THE POLYPOD FERN. 



