KAMALA 



395 



from 0.040 to 0.100 mm. in diameter and consisting of from 20 to 

 50 ellipsoidal, somewhat spatulate separate cells, which are radiately 

 arranged and inserted upon a short central stalk (Fig. 171, B). The 

 non-glandular hairs are peltate, consisting of from 5 to 20 unicellular 

 or uniseriate, thick-walled hairs, which are frequently somewhat 



FIG. 171. Kamala. A, glandular hair extracted with chloroform and mounted 

 in a solution of hydrated chloral; St, short stalk; Cu, cuticle; Se, resinous 

 secretion; Z, elongated ovoid, somewhat spatulate separate cells and of 

 which there are some 20 to 60 comprising the glandular hair. B, a longi- 

 tudinal section through a glandular hair showing the position and arrange- 

 ment of the individual cells; St, short stalk; Cu, cuticle; Se, resinous secre- 

 tion; Cm, wall of individual cells; P, granular cytoplasm, peltate groups 

 of unicellular (C) and uniseriate (D) non-glandular hairs. A and B, after 

 Meyer; C and D after Vogl. 



hooked at the end. Occasional fragments of the outer layers of the 

 pericarp are also present. Irregular angular fragments of sand and 

 other earthy or inorganic impurities may be present to the extent of 

 6 to 8 per cent. 



Constituents. The important constituent is about 80 per cent 

 of a dark brownish-red resin composed of a crystalline principle, 



