98 Rutacee—Citrus. 
hermaphrodite, very fragrant. The fleshy fruit is too well 
known to need description. There are only about five species, 
from tropical Asia, but the varieties are almost interminable. 
1. C. Aurdntium (fig. 63). Common Orange. — Neither 
this nor any species or variety of the genus is quite hardy in 
this country, though in some parts of Devonshire they succeed 
with slight protection. Formerly, when there was less variety 
in ornamental shrubs, they were more frequently grown in 
tubs or large pots in the conservatory, and removed into the 
open air during the Summer months. 
Orper XXVIII.—_SIMA RUBEZE:. 
A small order of shrubs or trees closely related to the 
Rutacee, except that the leaves are usually alternate and desti- 
tute of immersed glands, and the cells of the ovary uniovulate. 
The following is the only genus coming within our province. 
1. AILANTHUS 
Leaves unequally pinnate. Flowers small, polygamous, in 
terminal panicles. Calyx equally 5-lobed, imbricate. Petals 
5, spreading, induplicate-valvate. Disk 10-lobed. Stamens 
10; in the female flower none, in the hermaphrodite 2 or 3. 
Fruit of 1 to 5 linear-oblong 1-seeded samaras. There are 
two species besides glandulosa, one of which is common 
throughout the tropics. The native name of the following 
species is Ailanto, literally Tree of Heaven. 
1. A. glandulosa. tall handsome fast-growing tree with 
large pinnate deciduous leaves 1 to 2 feet long. Leaflets 9 to 
25, deeply toothed or lobed. Fruit red when ripe. This is 
one of the most distinct and desirable of ornamental trees with 
pinnate foliage in cultivation, and thrives well in the neigh- 
bourhood of the sea. It is a native of Japan and Mongolia. 
Orper XXIX.—MELIACE. 
A considerable order of trees and shrubs, chiefly from the 
tropics, and only represented in our gardens by one hardy 
Japanese species. The principal distinctive character is in the 
stamens, the filaments being united in a tube with the anthers 
sessile or stalked within the summit. 
