ROSALES. 



531 



Africa. Some of the latter bear edible fruits. The bark of Brazilian 

 trees of the genera Licania and Coutpia is paid to contain such consid- 

 erable quantities of silica, that it is burnt by the natives and used in 

 the manufacture of pottery. 



Order Leguminosse. The Pulse Family. Herbs, shrubs, and 

 trees, with alternate and usually compound leaves ; flowers for the most 

 part zygomorphic ; stamens usually twice as many as the petals ; pistil 



FIGS. 480-6. ILLUSTRATIONS OF PAPILIONACE.*:. 

 (480-5, Lathyrua odoratus.) 



FIG. 484 



480. 



Fig. 480. Section of flower. Magnified. Fig. -J81. -Diagram of flower. 

 Fi.'. 482. Calyx. Magnified. Fig. 483. Stamens and pistil. Mag. 



Fig. 484. Ripe fruit. Fig. 485. Part ol fruit, with a seed. 



Fig. 486.-Section of seed of Tetragonolobus. Magnified. 



monocarpellary and free ; seeds generally wanting an endosperm. A 

 vast order of 6500 species, distributed throughout the world. 



The species are usually disposed in three sub-orders, each containing 

 many tribes. 



Sub-Order I. Papilionacece, with zygomorphic flowers ; sta- 

 mens generally ten, monadelplious or diadelphous. This sub-order 

 contains a large number of plants of great economic importance. 



The food plants include the Pea (Pisum sativum), the so-called English 

 Bean (Vicia fdba), the Pole Bean (Phnseolw vu'garia), the Field Bean 



