LEAVES. 



73 



PLATE XXX. 



FIG. 40. Powdered Jaborandi Leaves (x 240). 



ccr, Crystal cells. 

 cr, Calcium oxalate crystals. 



ei, Lower epidermis with stomata; an internal oil-gland can be seen below 

 the epidermal cells. 

 ens, Epidermis of secondary veins. 

 es, Upper epidermis, strongly striated. 

 f, Pitted lignified cells from veinlets. 

 ftv, Portion of nbrovascular handle of midrib. 

 f p, Lignified cells of pericycle. 

 I, Bast. 



m, Spongy parenchyma. 

 p, hairs. 



pa, p'a', Palisade cells. 

 ps, Internal oil-gland. 



st, Stomata surrounded by four or five tangentially arranged cells. 

 tc, Crystal cells in rows. 

 tf , Cortical tissue of midrib. 

 tr, Tracheids. 



