CLASSIFICATION OF ANGIOSPERMS. 589 



Carapa Oil, which has a characteristic odor an<l bitter taste 

 and is toxic to insects, is obtained from tlie seeds of Carapa pro- 

 cera and C. giiianensis, of tropical West Africa and tropical 

 America, and also from Swietenia Mahagoni (Mahogany Tree). 

 Cedar-wood oil ("Oleum Cedrelae ") is obtained from several 

 species of Cedrela growing in tropical America. The most impor- 

 tant constituent of the oils is cadinine. (Jils with a garlic-like 

 odor are found in the seeds of Melia Azedarach, the bark (jf 

 Cedrela australis of Australia and the fruit of Dysoxylum bincc- 

 tariferum of Java. Besides the Mahogany tree there are other 

 trees of this family which yield valuable woods. Cigar boxes and 

 sugar boxes are made from the wood of Cedrela odorata of the 

 West Indies and Guiana, and from other species of Cedrela. 



k. MALPIGHIACE.^ is a rather large family of shrul)s, 

 small trees, or lianes with anomalous stem-structure, found in 

 the Tropics, principally in South America. The leaves are usually 

 opposite, the sepals are glandular, and the fruit is a winged samara 

 somewhat like that of maple {Acer). 



The plants contain a notable amount of tannin and the woods 

 of some species contain a red coloring principle. 



/. POLYGALACE^ OR MILKWORT FAAIILY.— The 

 members of this family are herbs or shrubs, occurring in all parts 

 of the world except in the Arctic regions. 



Polygala Senega is a perennial herb about j/? M. high. It has 

 a fleshy root, producing at the crown a large number of buds and 

 giving rise to a cluster of overground stems or so-called plants. 

 The leaves are alternate, lanceolate or oblong- lanceolate and ses- 

 sile ; the flowers are faintly greenish-white and in cylindrical 

 spikes ; the capsule is loculicidally dehiscent, and the seed is hairy 

 and slightly longer than the lobes of the caruncle. The root is 

 official. 



Polygala alba or -^hiit Milkwort yields the White or Texas 

 Senega. The stems are numerous and taller than those of /'. Sen- 

 ega; the leaves are narrow-lanceolate or linear witli revolute mar- 

 gin ; the flowers are white and in elongated conic spikes ; the 

 caruncle lobes are about half as long as the seed. The plant is 

 found w^est of the Mississippi River, extending as far south as 

 Texas and Alexico and west as far as Arizona and Xew Mexico. 



