CRUDE DRUGS. 



593 



tin, which crystallizes in prisms. A fixed oil, resin, and a prin- 

 ciple resembling tannin ; calcium oxalate, in the form of rhotnbo- 

 hedral crystals; and ash about 5 per cent, are also. present. 



Allied Drugs. — The immature fruits of Citrus Aurantium are 

 sometimes collected and are known as orange berries. They are 

 nearly globular ; 5 to 20 mm. in diameter, greenish, or brownish- 

 black, granular rugose; the internal structure resembles, that of 

 orange fruits, but the seeds are rudimentary; and the taste is 

 aromatic and bitter. 



Fig 2s6a. Tamarindus indica: A, flowering branch with paripinnate leaves; B, 

 flower bud; C, dorsi ventral .(irregular) flower; D, longitudinal section of flower showing 

 -unilocular ovary; E, somewhat curved, indehiscent legume; F, G^ transverse and longi- 

 tudinal sections of the seed. — ^After Taubert. 



TAMARINDUS.— TAMARIND.— The preserved pulp of 



the ripe fruit of Tamarindus indica (Fam. Leguminosge), a tree 



(Fig. 256a) indigenous to tropical Africa and cultivated in the 



West and East Indies (p. 294) from whence the two chief 



■commercial varieties are obtained. 



West Indian Tamarind. — Usually a blackish-brown mass, 

 with a distinct odor and strongly acidulous, sweet taste, and in 

 which are embedded numerous seeds enclosed in a loose, tough 



38 



