THE CELL AND TISSUE. 



69 



other cells (Fig. 103). Immediately below each stomate is an 

 air-cavity and from this there is communication with the large 

 spaces between the cells in the interior of the leaf. Though 

 the size is small yet the number of the stomates is enormous. 



Fig. 102. 



For example, in the leaf of the Anemone there are about 

 43,000 .to the square inch on the under side, none on the 

 upper. On the upper side of the leaves of the Indian Corn 

 there are about 60,000 and on the lower surface about 102,000 



Fig. 103. 



to the square inch. In the leaf of the Sunflower there are 

 about 112,000 stomates above and about 209,000 below. In 

 the leaves which float on the water stomates occur only on the 

 upper side. They are wholly wanting in submersed leaves. 



11. The woody strands (called also fihro-vascular bundles) 

 can be easily separated from the other tissue in the stems of 

 Indian Corn, of the Plantain leaf, etc., but microscopic ex- 

 aminatioii is necessary to determine their structure. In one 



