CRUDE DRUGS. 



629 



Description. Stem quadrangular, i to 2 mm. in diameter, 

 light or reddish-brown, with numerous spreading hairs. Leaves 



Fig. 271. Matico: A, branch with leaves and flower spikes (f); B, section of leaf 

 showing one of the truncate teeth, fibrovascular bundle (v), oil-secretion reservoirs (o); 

 C, transverse section of leaf near two veins, showing upper epidermis of several layers (e), 

 palisade cells (p), tracheae (t), sieve (s), collenchyma (c), loose parenchyma containing 

 crystals of calcium oxalate (ca), hairs (h); D, transverse section of leaf showing in addi- 

 tion an oil-secretion reservoir (o); E, portion of lower epidermis showing three stomata; 

 F, portion of upper epidermis; G, portion of leaf showing the glandular- punctate character 

 due to the oil-secretion reservoirs (o); H, non-glandular hairs; I, stamen; J, pollen grains, 

 which are about lo /ai in diameter; K, prisms of calcium oxalate; L, a hair from the oeri- 

 anth; M, tracheae from the stem with spiral and annular markings. 



elliptical or ovate, opposite, 15 to 35 mm. long, 5 to 14 mm. 

 broad ; apex obtuse ; base tapering into the oetiole ; marfjin 



