FRONDS OR LEAVES 



73 



number of divisions called pinnce (singular, pinna). If the 

 pinnae are divided the divisions are called pinnules. In the 



FIG. 37. Filicales. Evergreen wood-fern (Dryopteris marginalis). 1, 

 Roots; 2, stipe bases covering the rhizome; 3, stipe of frond; 4, frond divided 

 into pinnse and these divided into pinnules as at 4. 



