11. =Àcer palmàtum=, Thunb. (PALMATE-LEAVED JAPAN MAPLE.) Leaves small, smooth, palmately parted into 5 to 9 quite regularly serrated lobes. Flowers in small umbels. A very low tree, almost a shrub; cultivated; from Japan; probably hardy throughout. There are a great number of Japan Maples, many of them probably varieties of this species, others hybrids. The leaves of some are so divided and dissected as to form merely a fringe or feather. In color they range from pure green to the richest reds. [Illustration: À. circinàtum.] 12. =Àcer circinàtum=, Pursh. (ROUND-LEAVED OR VINE MAPLE.) Leaves orbicular, with 7 to 11 serrated, acute lobes, a heart-shaped base, reddish-green color, and both surfaces smooth. Corymbs of purplish flowers, small and hanging on long peduncles; appearing after the leaves. Wings of the fruit diverging in a straight line. A small tree or tall shrub, 10 to 30 ft. high, of spreading habit, with smooth bark, and pale brown twigs; cultivated; from the Pacific coast of North America. [Illustration: À. Tartáricum.] 13. =Àcer Tartáricum=, L. (TARTARIAN MAPLE.) Leaves ovate, slightly cordate, rarely lobed, serrated, light-colored, expanding 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. NEGÚNDO.= Leaves pinnate, of 3 to 5 leaflets. Flowers rather inconspicuous. Fruit a two-winged key as in Acer, in drooping racemes. [Illustration: N. aceroìdes.] =Negúndo aceroìdes=, 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. ANACARDIÁCEÆ.= (CASHEW FAMILY.) Trees and shrubs, mainly of the tropical regions, here represented by only one genus: GENUS =27. RHÚS.= 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.