42 



SOUTH INDIAN GRASSES 



Motor-cells are usually confined to the upper epidermis, but they 

 may also be found in the lower epidermis. In the leaves of 



rTo. 68. — Transverse section of a portion of the leaf of 

 Pennisetum cenchroides. x 100 



I. Motor-cells; 2. stomata ; 3. sclerenchyma ; 4. chlorophyllous layer. 



Pennisetum cenchroides motor-cells are found in both the upper 

 and the lower epidermis, the group in the upper epidermis alter- 

 nating with that in the lower. 



