HOLDO LEAVES. 



93 



easily see here that the roughness of the upper surface is due only 

 to the enlarged bases of the epidermal hairs. The portion of this 



Fit. J. 



Epidermal Hairs. From the Lower Surface of the Leaf. 

 Magnified 200 Diameters. 



section seen at c was more highly magnified and represented in fig. 

 5. The upper surface of the leaf is furnished with two rows of 

 thick walled epidermal cells, which is unusual, as leaves have gene- 

 rally only one row. Directly beneath these is found the usual row 

 of elongated palisade cells, />, filled with chlorophyll. In a dried 



Fig. 4- 



face 



* A^ C 



Cr<>ss Section of Leaf. a. Stellate Hairs on tJie Loiter Siir- 

 />, Unicellular Hairs on the I TyV/' Surface. Magnified. 



