desirable
tree has the flowers of a decided pinky-red. There is a double-flowered
variety Ae. glabra flore-pleno (_syn Ae. rubicunda flore-pleno_) and
one of particular merit named Ae. rubicunda Briotii.

AE. HIPPOCASTANUM.--The Common Horse Chestnut. Asia, 1629. A fine
hardy free-flowering tree, supposed to have been introduced from Asia,
and of which there are several varieties, including a double-flowered,
a variegated, and several lobed and cut-leaved forms. The tree needs
no description, the spikes of pinky-white flowers, which are produced
in great abundance, and ample foliage rendering it one of, if not the
handsomest tree of our acquaintance. It gives a pleasing shade, and
forms an imposing and picturesque object in the landscape, especially
where the conditions of soil--a rich free loam--are provided. Ae.
Hippocastanum alba flore-pleno (the double white Horse Chestnut), has
a decidedly pyramidal habit of growth, and the flowers, which are
larger than those of the species, are perfectly double. It is a very
distinct and desirable large growing tree. Ae. Hippocastanum laciniata
and Ae. Hippocastanum digitalis are valuable for their divided leaves;
while Ae. Hippocastanum foliis variegatis has the foliage rather
irregularly variegated.

AE. PARVIFLORA (_syn Pavia macrostachya_).--Buckeye. North America,
1820. This is very distinct, and possesses feature which are shared by
no other hardy tree or shrub in cultivation. Rarely exceeding 12 feet
in height, and with a spread of often as much as 20 feet, this shrub
forms a perfect hemisphere of foliage, and which, when tipped with the
pretty fragrant flowers, renders it one of the most effective and
handsome. The foliage is large, and resembles that of the common Horse
Chestnut, while the pure white flowers, with their long projecting
stamens and red-tipped anthers, are very pretty and imposing when at
their best in July. It succeeds well in rich, dampish loam, and as a
shrub for standing alone in any conspicuous position it has, indeed,
few equals.

AE. PAVIA (_syn Pavia rubra_).--Red Buckeye. North America, 1711. A
small growing and slender-branched tree or shrub, which bears an
abundance of brownish-scarlet flowers. There are several good
varieties, two of the best being Ae. Pavia atrosanguinea, and Ae.
Pavia Whittleyana, with small, brilliant red flowers.

There are several other species, such as Ae. Pavia humilis (_syn Pavia
humilis_) of trailing habit; Ae. fl