RTJTACEiE. 



123 



and extremely sweet. In the south of Europe this Asiatic 

 tree^will bear the open air, but here it must be in the green- 

 house, or conservatory : the dwarf kind is the most suitable 

 as to size. The soil they prefer is light mould, mixed with 

 river-sand, and hotbed manure and leaves ; they grow very 

 well in pots or boxes, but do not produce fruit so well as 

 when planted in the ground in a conservatory. 



The other fruits of this genus are not very often in- 

 troduced into the greenhouse, except C. nobilis, the Man- 

 darin Orange, which is a free grower, and has a dwarf, 

 bushy habit, with small leaves and abundant bloom. In 

 September, all plants of this genus are improved by being 

 fally exposed to the outer air and the sun ; they then ripen 

 their wood better, and produce more of their deliciously 

 sweet-scented flowers. 



RUTACE2B. 



Exogens, with flowers regular or irregular. Calyx having 

 four or five divisions. Petals four or five, distinct, or combined 

 in a corolla of one petal. Stamens equal in number to the 

 petals, or twice or thrice as many ; between the stamens and 

 ovary there is a more or less complete cup-shaped disc, which is 

 either free or united to the corolla. Leaves usually covered 



