75 



able. This is especially noticeable in Euphorbia cereiformis, of 

 which specimens will be found in the collection. They belong, 

 however, to an entirely different family, the Euphorbiaceae, com- 



House No. 7. 



In thij house will be found, among others, representatives of 

 the following families : the wood-sorrel family, Oxalidaceae '; the 

 pea family, Papilionaceae ; the mimosa family, Mimosaceae ; the 

 senna family, Caesalpinaceae ; the custard-apple family, Anon; 

 ceae ; the cactus family, Cactaceae ; the gamboge family, Clu: 

 iaceae ; the spurge family, Euphorbiaceae ; the stone-crop family, 

 Crassulaceae ; the cocaine family, Erythroxylaceae ; the marc- 

 gravia family, Marcgraviaceae ; the myrobalan family, Combi 

 taceae ; the mezereon family, Thymeleaceae ; the ginseng family, 

 Araliaceae ; the mahogany family, Meliaceae ; and the cho< 

 tree family, Sterculiaceae. Species to which reference is made 

 below are to be found in the collection in this house. 



Among the members of the pea family, Papilionaceae, is the 

 interesting telegraph plant, as it is called, Meibomia gyrans, a 

 native of tropical Asia. Its leaves are trifoliolate, the middle 

 leaflet being large ; the two lateral leaflets are much smaller, a 

 half inch long or less, and are often to be found slowly rnoving 



of the telegraph plant. 



In the senna family, Caesalpinaceae, are a number of interest- 

 ing plants. One of these, of great commercial importance, is 

 the logwood, Haematoxylon campecliianinn, found now through- 

 out tropical America. The tree grows to a height of twenty to 

 thirty feet, and is exported in large quantities to this country on 

 account of its deep-red wood, from which a dye is obtained. 

 Another tree from which a dye is secured is Caesalpinia Sappan, 

 known as sappan wood, a native of the East Indies. It grows 

 :o be thirty to forty feet tall. Another plant, belonging to this 

 amily, of economic importance, is Copaiva officinalis, one of the 

 olants from which copaiba is obtained. The tree is an inhabitant 

 Df northern South America, where it attains a height sometimes 



