nding very early in
the spring. Panicle of greenish-yellow flowers erect, blooming after the
leaves have expanded. Wings of the fruit parallel or sometimes touching.
A small tree, sometimes shrubby in growth, of irregular form, with brown
twigs; rarely cultivated; from Europe.

GENUS =26. NEGUNDO.=

Leaves pinnate, of 3 to 5 leaflets. Flowers rather inconspicuous. Fruit
a two-winged key as in Acer, in drooping racemes.

[Illustration: N. aceroides.]

=Negundo aceroides=, Moench. (ASH-LEAVED MAPLE. BOX-ELDER.) Leaves
pinnate, of 3 to 5 (rarely 7) coarsely and sparingly toothed leaflets.
Flowers staminate and pistillate on separate trees, in drooping clusters
rather earlier than the leaves. Fruit on only a portion of the trees;
wings forming less than a right angle. A rather small (30 to 60 ft.
high), rapidly growing tree, with light pea-green twigs; wild from
Pennsylvania and south, and cultivated throughout.

Var. _Californicum_, Torr. and Gray (the under drawing in the figure),
has leaflets more deeply cut, thicker, and quite hairy; it is
occasionally cultivated.

ORDER =XVI. ANACARDIACEAE.=

(CASHEW FAMILY.)

Trees and shrubs, mainly of the tropical regions, here represented by
only one genus:

GENUS =27. RHUS.=

Low trees or shrubs with acrid, often poisonous, usually milky juice,
and dotless, alternate, usually pinnately compound leaves. Flowers
greenish-white or yellowish, in large terminal panicles. Fruit small
(1/8 in.), indehiscent, dry drupes in large clusters, generally
remaining on through the autumn.

* Leaves simple, rounded, entire 6, 7.

* Leaves once-pinnate. (=A.=)

=A.= Twigs very hairy; rachis not winged; leaflets 11 to 31 1.

=A.= Twigs downy; rachis wing-margined; leaflets entire or
nearly so 3.

=A.= Twigs smooth. (=B.=)

=B.= Rachis of leaf broadly winged; leaflets serrate 5.

=B.= Rachis not winged. (=C.=)

=C.= Leaflets 11 to 31, serrate; fruit hairy 2.

=C.= Leaflets 7 to 13, entire; fruit smooth; poisonous 4.

* Leaves twice-pinnate; variety under 2.

[Illustration: R. typhina.]

1. =Rhus typhina=, L. (STAG-HORN SUMAC.) Leaflets 11 to 31,
oblong-lanceolate, pointed, serrate (rarely laciniate), pale beneath.
Branches and footstalks densely hairy. Fruit glo