THE OB0UP8 OF TISSUES, OS TISSUE-SYSTEMS. 43 



Fig. 26. Fig. 27. 



Fig. 26.— Transverse section of epidermis and underlying tissue of ovary 

 of a Squash, a, hair of a row of cells ; b and d, glandular hairs of diif erent 

 ages ; e, /, c, hairs in the youngest stages of their development. Magnifled 

 100 times. 



Fig. 27.— a seedling Mustard-plant with its single root clothed with root- 

 hairs ; the newest (lowermost) portion of the root is not yet provided with 

 root-hairs. 



Fig. 28.— Glandular hairs of Chinese Primrose in several stages of devel- 

 opment. Magnifled 142 times. 



