416 



BOTANY 



Order III. Salicales 



These are trees and shrubs with dioecious flowers of simple structure (Fig. 

 394). They are especially characteristic of northern regions. There are but 

 two genera Salix ( Willow) and Populus (Poplar) and one family, Salicaceae. 



Order IV. Myricales 



This is a small order of shrubby plants or trees, comprising the single genus 

 Myrica, which is sometimes subdivided. The flowers are structurally much like 

 those of the Salicacese. Myrica cerifera is the Wax-myrtle of the eastern 

 United States, M. (Comptonia} asplenifolia (Fig. 396) the "Sweet-fern." A 

 single family Myricacepe. 



A 



O" 



FIQ. 397. Juglans regia. A, youug shoot with female flower, 9- B, a single 

 flower. C, section of the ovary, showing the single ovule, o. 



Order V. Balanopsidales 



A group of doubtful affinity represented by a single genus, Balanops. 

 are several species, trees and shrubs inhabiting New Caledonia. 



There 



Order VI. Leitneriales 



An order represented by two species of Leitneria, shrubby plants from Florida 

 and Texas. 



Order VII. Juglandales 



Thft Juglandales include the single family Juglandacese, to which belong 

 the Walnuts and Butternut (Juglans) (Fig. 397) and the Hickories (Carya) 

 (Fig. 398). The staminate flowers are in drooping catkins, and the pistillate 



