SUB-KINGDOM II. PHANEROGAMS. 43 



SECTION B. DICOTYLEDONES. Seeds with two or more carpels. Stem 

 "exogenous," with bark, wood, and pith. Leaves netted-veined. 



CLASS III. GYMNOSPERM^;. Seeds naked, the pollen acting directly 

 upon their surface. Ex. Pines and Cycads. 



CLASS IV. ANGIOSPERM^:. Seeds enclosed in seed-vessels, the 

 pollen acting through their tissues. Ex. Oak, Beech, and most ordinary 

 trees and shrubs. 



