Sapindacee—Xanthoceras. 105 
2, XANTHOCERAS. 
Leavesalternate, exstipulate,imparipinnate. Flowers regular, 
polygimous, large, white, in terminal simple racemes ; pedicels 
long, bracteate at the base. Sepals 5, boat-shaped, imbricate. 
Petals 5, elongated, clawed, without scales. Stamens 8. Cap- 
sule as large as an apple, corticate, 3-celled, with several seeds 
in each cell, splitting loculicidally. Name from £av@ds, yellow, 
and xépas, a horn. 
1. X, sorbifolia.—The only species, still very rare in gardens. 
It is a beautiful hardy tree of small stature, with leaves resem- 
bling those of Pyrus Aucupdria, and white flowers with a 
purple eye. The spot at the base of each petal is primarily 
yellow, hence probably the generic name. A native of North 
China. 
3. AUSCULUS (including Pavia). 
Noble trees with opposite exstipulate digitately 5- to 9-folio- 
late deciduous leaves and terminal panicles or racemes of 
usually showy flowers. Flowers polygamous, irregular. Sepals. 
and petals 4 or 5. Stamens 5to8. Capsule coriaceous, prickly 
or smooth, 3-lobed or globose, 3- (or by abortion 1- or 2-) celled ; 
seeds large, resembling the fruit of the edible Chestnut. There 
are about fourteen species, from North America, the mountains 
of Central America and Asia. From esca, food. Pavia was 
separated on account of the capsule being naked, but this cha- 
racter is uncertain and variable. 
1. &. Hippocdstanum (fig. 64). Horse Chestnut.—This 
highly ornamental tree needs no description. It is supposed to. 
be a native of Asia, and was introduced into Europe some three 
centuries ago. There is a double-flowered variety, and also 
variegated and other varieties, differing in the leaves being 
more or less lobed or cut. 
2. &. rubictinda, syn. Ai. coccinea, di. cdvnea. Scarlet- 
flowered Horse Chestnut.—The origin of this is obscure; by 
some it is averred to be from North America, and by others a 
garden variety of the preceding. However that may be, itis a 
beautiful tree, differing in its smaller stature and more rounded 
head from the common one. There are several varieties 
referred to this, but none of them probably superior to the type. 
3. H. Indica.—A very handsome though still very rare tree. 
Leaves very large, glabrous, 7- to 9-fotiolate ; leaflets obovate- 
