LEAVES. 



81 



PLATE XXX IV 



FIG. 44. Powdered Sage Leaves (x 240). 



ei, Lower epidermis. 

 en, Neural epidermis. 

 e'p', Epidermis, of petiole. 

 es, Upper epidermis. 

 fv, Vessels from midrib. 

 go, Unicellular gland. 

 g'o', Octocellular gland. 

 ip, Scar of hair. 

 p, Simple hairs. 

 pa, p'a', Palisade cells. 



st, Stomata with the ostiole at right angles to the walls separating two cells 

 from one another. 



tf, Cortical tissue of midrib. 

 tr, Tracheids. 



