Fig. 382: Populus Freinontii var. arizonica: a, sterile hranchlets to show leaf varia- 

 tion, X ll>; b, fruiting branchlets, x V2; c, young fruits and floral disks, x 4. (From Cor- 

 rell in Lundell's Flora of Texas, Vol. 3, PI. 58.). 



