A TEUK BOOK POR EVERYBODY. 



foot-stalks, and though sometimes not more than 8 or 9 

 inches in length, will even attain, under favourable cir- 

 cumstances, 3 feet, or more. The fronds are not only- 

 divided into separate distinct leaflets along each side of 

 the mid-rib, with a lance-shaped outline, but each of 

 these leaflets is again divided to the centre in a feathery 

 manner into lobes or segments, called pinnules^ It is 

 therefore called bi-pinnate. The pinnules, or ultimate 



Alpine Polypody fPolypodium aPpestre.J 



sub-divisions, are between oblong and egg-shaped, and 

 sharply toothed along the margins. So deeply cut are the 

 marginal teeth in some cases, that the frond has the 

 appearance of being again pinnate, tri-pinnate, or three 

 times divided in a pinnate manner. 



It is plentiful on the Scotch mountains up to a con- 



