48 I. POLYPODICM. 
The Mountain Polypody has a tough, slender, dark- 
coloured, slightly scaly, extensively creeping caudex, pro- 
ducing black fibrous roots. The fronds are hairy, deli- 
[Polypodium Phegopttris.] 
cate in texture, and pale green ; they are produced in May, 
and are developed with rapidity, reaching maturity in 
July, and becoming destroyed by the earliest frosts ; they 
