5. AEsculus macrostachya, Mx. (LONG-RACEMED BUCKEYE.) Leaflets 5 to 7,
ovate, acuminate, serrate, velvety with hairs beneath. Flowers white, in
long, slender, erect clusters; July; petals 4, spreading; stamens very
long. A beautiful, widely spreading shrub. 5 to 18 ft. high; from the
Southern States; often cultivated. Probably hardy throughout.

GENUS =24. KOELREUTERIA.=

A small tree with alternate, once to twice irregularly pinnate leaves
with many coarsely toothed leaflets. Flowers conspicuous, yellow, in
terminal panicles. In summer. Fruit rounded, bladdery, 3-celled,
few-seeded pods; ripe in autumn.

[Illustration: K. paniculata.]

=Koelreuteria paniculata=, Laxm. Leaflets thin and very irregularly
toothed. Clusters 6 to 12 in. long, of many irregular flowers, 1/2 in.
wide; through the summer. Fruit an ovate, bladdery capsule, ripening in
autumn. A fine, small, round-headed tree, 20 to 40 ft. high; from China.
Probably hardy throughout.

GENUS =25. ACER.=

Trees, or rarely shrubs, with simple, opposite, and almost always
palmately lobed leaves, which, in our species, are always deciduous.
Flowers small and usually dull-colored, in clusters. Fruit double-winged
and 2-seeded, in some species hanging on the tree till the leaves have
fallen; in others dropping off early in the spring. The species differ
much in the spreading of the wings of the fruit. Wood light-colored and
medium hard; bark rather smoothish, but in large trees with longitudinal
cracks.

* Leaves slightly or not lobed 13.

* Leaves about 3-lobed (rarely 5-lobed); shrubs or small trees.
(=A.=)

=A.= Leaves serrate 1, 2.

=A.= Leaves somewhat sinuate, not at all serrate; juice milky. 10.

* Leaves 5-, rarely 3-lobed. (=B.=)

=B.= The lobes acute, irregularly but quite fully serrate;
juice not milky. (=C.=)

=C.= The fruit in corymbs, dropping early; American
species. (=D.=)

=D.= Leaf-notches somewhat rounded; tree large; limbs
drooping on old trees 3.

=D.= Leaf-notches acute; tree small 4.

=C.= Fruit in hanging racemes, remaining on the tree till
autumn; leaves thickish 5.

=B.= The lobes acute; sparingly or not at all serrate. (=E.=)

=E.= Juice n