106 DE CANDOLLE'S SYSTEM. 



U SES . Mucilaginous plants with tough fibres. The leaves 

 of Corchorus olitorius are eaten as spinach. Corchorus cap- 

 sularis furnishes a kind of coarse hemp in India. From the 

 inner hark of Tilia Europsea Russia mats are made; its 

 flowers, separated from the hracts, are said to be antispasmodic. 



TYPICAL GENERA. Tilia, Triumfetta, Grewia. 



28. Dipteracea. Trees. Leaves alternate, with involute 

 vernation; stipules deciduous. Calyx 5-lobed, unequal, be- 

 coming enlarged, imbricated. Petals contorted. Stamens 

 indefinite, distinct ; anthers subulate, opening longitudinally 

 towards the apex. Ovary without a disk, few-celled ; ovules 

 in pairs, pendulous; style single. Fruit surrounded by a 

 calyx, having tough, leafy, enlarged, permanent divisions. 

 Seed single, without albumen. Cotyledons crumpled. 



USES. Tropical trees often yielding valuable timber ; that 

 called Sal, or Saul, belongs to Shorea robusta. The juice is 

 balsamic; Dryobalanops Camphora yields Sumatra Camphor.' 

 Vateria Indica furnishes Copal. ' Dammer pitch is obtained 

 from species of Shorea. 



TYPICAL GENERA. Shorea, Dipterocarpus, Vateria. 



29. Aumntiacea. Trees or shrubs, almost always smooth 

 and filled with transparent receptacles of oil. Leaves alter- 

 nate, often compound, always articulated with the petiole. 

 Flowers usually white or green, and fragrant. Calyx urceo- 

 late or campanulate, short. Petals 3-5, inserted upon the 

 outside of an hypogynous disk. Stamens inserted upon an 

 hypogynous disk; filaments sometimes combined in one or 

 several parcels. Ovary many-celled ; style 1 ; stigma thick- 

 ish. Fruit many-celled, filled with pulp. Seeds usually pen- 

 dulous ; raphe and chalaza distinctly marked. 



USES. The Orange, Lemon, Lime, and Citron are species 

 of Citrus, and are well known for the aromatic rind and pulpy 

 flesh of their fruit. The wood is generally hard and durable. 

 The unripe fruit of ^gle marmelos, an Indian tree, is pre- 

 scribed in diarrhrea and dysentery. The leaves of the order 

 generally are regarded as stomachic and tonic. 



TYPICAL GENERA. Citrus, Triphasia, Limonia. 



SQTernstromiacea. Trees or shrubs. Leaves alternate, 



