GERMINATION OP TREES AND SHRUBS 



311 



cent ou the upper and lower surfaces of the leaf. Margin undu- 

 late, the lobes with bristles. Trichomes of the reddisli stem in 

 groups, colorless, slender, pointed. Trichomes of under and 

 upper sides of leaves similar to those of the stem; each trichoma 



Fig 

 F. E. 



72. — Spanish oal<, Quercus falciitd. 

 Colburn. 



Pliotograplied by Piioto. Section, 



in a single cell ; fairly thick-walled. Basal portion larger. 



Quercus eJlipsoidalis. E. J. Hill. Yellow or Black Oak. Col- 

 lected at Osage, Iowa, fall of 1917. Received Octoher 10, and 

 planted outside for wintering. Lifted and placed in greenhouse 



