i8 



ILLUSTRATED TERMS. 



grow from the embryo plants are designated as being : Mono- 

 cotyledonous^ when there is but one seed-leaf ; Dicotyle- 

 donous when there are two ; and Polycotyledonous when 

 there are many seed-leaves, as in the pine family. (Plate IV.) 

 The Plumule is the first little bud that appears at the sum- 

 mit of the hypocotyl and foretells the second growth of leaves. 

 (Plate I.) 



