A TEXT-BOOK OF BOTANY. 



rsg. 



PIG. 125. Several forms of glandular hairs: i. In which the resinogenous layer (rsg) 

 separates in the form of small rods, as the leaves of violets (A), Fraxinus (B), and Alnus (C). 

 2. The resinogenous layer separating in the form of vacuoles in the hairs of Salvia (D) 

 and Hyssopus (E), observed in the dried material treated with dilute solutions of hydrated 

 chloral. 3. A lattice-like or cellular resinogenous layer occurring in the hairs of Rhodo- 

 dendron (F) and Azalea (G). After Tunmann. 



