JABORANDI 



367 



lower epidermis occur numerous stomata. On surface view the 

 stomata are broadly elliptical, 0.025 to 0.040 mm. in length, being 

 uniformly smaller in Maranham Jaboiandi. Upon both surfaces of 

 Pernambuco Jaborandi occur a number of non-glandular, 1-celled 

 hairs, which are more or less curved, from 0.080 to 0.500 mm. in 

 length, thick-walled and with numerous, slight, centrifugal projec- 

 tions. 



FIG. 161. Powder of Pilocarpus. U, fragments of upper epidermis; L, frag- 

 ment of lower epidermis with a stoma; Cy, non-glandular hairs; Co,, rosette 

 aggregates .010 to .027 mm. in diameter; Bf, bast fibers; Wf, wood fibers; 

 T, tracheae with close annular thickenings and simple and bordered pores; 

 Pi, parenchyma cells containing oil globules; 0, oil globules; P, parenchyma 

 cells. Drawing by Haase. 



Powder. (Fig. 161.) Dark-green or greenish-brown, epidermal 

 cells on surface view 5- to 6-sided, stomata broadly elliptical, from 

 0.020 to 0.040 mm. in length, usually with four neighboring cells; 

 fragments of fibrovascular bundles showing tracheae with simple or 

 bordered pores or spiral thickenings, associated with thick-walled 

 and strongly lignified wood fibers; sclerenchymatous fibers few, walls 

 thick and only slightly lignified; calcium oxalate in rosette aggre- 



