488 



SCIENTIFIC AND APPLIED PHARMACOGNOSY 



Powder. Light brown ; calcium oxalate crystals numerous, from 

 0.003 to 0.010 mm. in diameter, mostly in rosette aggregates, either 

 isolated or in aleurone grains; sclerenchymatous fibers irregularly 

 curved, having thick, yellowish, lignified walls and numerous simple 

 pores; globules of fixed oil numerous; fragments of light-yellow 

 vittae few, associated with elongated, polygonal, epidermal cells. 



Constituents. Volatile oil 0.5 to 1 per cent; fixed oil about 13 

 per cent; tannin; calcium oxalate; ash about 5 per cent. The 

 volatile oil consists of about 90 per cent of d-linalool (coriandrol), 

 about 5 per cent of d-pinene and some other constituents. 



Fio. 209. Cross-section of a mericarp of conium: c, c, commissural surface; e, 

 portion without secondary ribs; o, portion showing slight development of 

 secondary rib; o', secondary rib; v, fibro vascular bundle of pericarp (m); 

 t, t', layers containing coniine; a, endosperm; b, tissues of the embryo. 

 After Fliickiger. 



The unripe fruits are said to yield a volatile oil that has a fetid, 

 disagreeable odor, which it loses on keeping. 



Standard of Purity. Coriander seed is the dried fruit of Corian- 

 drum sativum L. It contains not more than 7 per cent of total ash, 

 nor more than 1.5 per cent of ash insoluble in hydrochloric acid. 

 (U. S. Dept. Agric.) 



Allied Plants. Bombay or Indian Coriander are the fruits of a 

 variety of Coriandrum sativum imported from Bombay. The fruits 

 are oval and yield less volatile oil than the official drug. (U. S. 

 Dept. Agric.) 



