174 GUTTIFEIUE. 



embryo with large and thick cotyledons, and a conspi- 

 cuous plumula. 



Trees or shrubs with smooth stems and branches ; 

 leaves alternate, sometimes compound, the lamina arti- 

 culated with the petiole, which may be winged. Over 

 the whole plant predominate transparent receptacles of 

 volatile oil, which give the leaves a dotted appear- 

 ance. 



Geographical Relations. East Indies, China and Ja- 

 pan, are their principal habitats, but many species have 

 become almost naturalized to the southern parts of 

 Europe. 



Properties. Without exception innocuous, and much 

 esteemed for their fragrant volatile oil, and delicious 

 refreshing fruits. A transparent glutinous matter is 

 found in some. 



Officinal Plants. 



Citrus aurantium. 

 Citrus medica. 



9. GUTTIFER^;. 



2 to 6, persistent, round, membranous, often 

 irregular and coloured, imbricated during aestivation, 

 Petals 4 to 10, hypogynous, passing insensibly to se- 

 pals. Stamens numerous, sometimes combined in one 

 or more fasciculi, hypogynous ; anthers adnate, burst- 

 ing inwards, sometimes bursting outwards or by a pore. 

 Disk fleshy, occasionally five-lobed. Ovarium supe- 

 rior, 1-8-celled, one or many ovuled; style wanting, or 

 very short; stigma peltate or radiate. Fruit, dry or 

 succulent, one or many-celled and seeded, dehiscent or 

 indehiscent. Seeds often arillate and placed in pulp, 



