77 



used in medicine as a mild laxative. They are imported CASE 

 from the East and West Indies, but chiefly from the 39. 

 latter. Wood, bark and gum of this species are also 

 shown. The bark is in considerable demand in some 

 parts of India for tanning purposes. 



Observe specimens of American Senna, the leaflets 

 of Cassia mari/Jandica, L., a perennial herb, 3 or 4 feet 

 high, common on low sandy ground throughout the 

 United States. American Senna is usually found in 

 commerce in compressed, oblong cakes, often containing 

 leaflets, petioles and flowers. 



No. 217. Alexandrian or Nubian Senna (Cassia 

 acuiifolia, Delile). A shrub about 2 feet high, native 

 principally of Nubia, Sennaar, and Kordofan. This kind 

 of senna is imported in large bales from Alexandria, 

 hence its name. It is sometimes adulterated with Argel 

 leaves (Solenostemma Argel, Hayne). [See case 78.] 



No. 218. Arabian or Tinnivelly Senna (Cassia 

 angustifolia^ Vahl). A small shrub of Southern Arabia, 

 Somali Land, Scinde, and the Punjab. The leaflets when 

 gathered and dried form part of the senna of commerce, 

 known as Arabian, Mocha, Bombay, or East Indian Senna. 

 These sorts are exported from Mocha, Aden and other 

 ports of the Red Sea to Bombay, from whence they are re- 

 exported to Europe and America. They are regarded in 

 commerce as of inferior quality in consequence of their 

 being carelessly dried and often mixed with portions of 

 legumes, stalks and flowers. All the Sennas are purgative. 

 The kind known as Tinnivelly Senna is furnished by the 

 same plant grown in Southern India, and on account of 

 its more luxuriant growth and careful preparation, is 

 considered in commerce as a fine kind. The best Senna, 

 however, is that afforded by C. acuti folia. 



Observe also specimens of Italian, Tripoli, or 

 Jamaica Senna (C. obovata, CoUad.), the first kind 

 known to botanists, a shrubby perennial found in Egypt, 

 Nubia, Abyssinia and Tripoli. Cultivated in Italy in the 

 first half of the 16th century, and now naturalised in 

 Jamaica. 



No. 219. CaroBj St. John's Bread or Locust CASE 

 Bean, the pods of Ceratonia Siliqua, L., a branching 40. 



