636 



BOTANY AND PHARMACOGNOSY. 



cent, ovary oblong, about i mm. long, with a single campylo- 

 tropous ovule. Odor distinct. Taste slightly acrid. 



Constituents. From 15 to 20 per cent, of a resin (called 

 cannabin), consisting of a number of substances, one of which, 



273- Scopolia carniolica: A, leaf; B, a fruit showing long stalk and slightly 

 lobed calyx; C, portion of calyx showing broadly acute lobes; D, E, transverse sections 

 of leaf showing upper epidermis (e), palisade cells (p), loose parenchyma (m), collen- 

 chyma (c), lower epidermis (1), fibro vascular bundle with a single trachea (v), stoma (s); 



F, epidermal cells of lower surface showing foldings due to irregularity of the outer walls; 



G, epidermah cells and stoma from lower surface; H, glandular hairs (which are only 

 occasionally found); I, fragment of leaf showing spiral trachea; (t). cells containing crypto- 

 crystallme crystals of calcium oxalate (c); K. isolated crystals of calcium oxalate, which 

 sometimes occur ni aggregates from 25 to 40 m in diameter; L, fragment of stem showing 

 trachea with reticulate thickening (r), simple pores (p) and spiral thickening (s). 



cannabinol (cannabindon) occurs as a red, oily substance and 

 is said to possess the intoxicating properties of the drug. The 

 drug also contains 0.3 per cent, of a yellowish volatile oil. which 

 consists chiefly of a sesquiterpene, cannibene and a stearoptene. 

 A similar sesquiterpene is present in the staminate plant of Canna- 



