THE MICROSCOPE. 



159' 



Fig. 3. Epidermal Hairs. — From the Lower Surface of the Leaf. 

 Magnified 200 Diameters. 



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

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

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



Fig. 4. Cross Section of Leaf.— a, Stellate Hairs on the Lower Surface, 

 b, Unicellular Hairs on the Upper Surface. Magnified. 



specimen the chlorophyll is of a yellowish-brown color. Forming 

 the central part of the leaf are the loosely packed cells, called par- 

 enchyma, loaded with brown coloring matter and dead protoplasm. 



