88 TREES OF THE NORTHERN UNITED STATES 
broadly spreading; fruit ripening very late. A low (15.to 30 ft. high), 
round-headed tree, with the twigs and smaller branches covered 
with corky bark. Occasionally cultivated; from Europe. 
Var. variegatum has white blotched leaves. 
11. Acer palmatum, Thunb. (PALMATE-LEAVED 
JAPAN Mapue.) Leaves small, smooth, palmately 
parted into 5 to 9 quite regularly serrated lobes. 
Flowers in small umbels. A very low tree, almost 
1 a shrub; cultivated; from Japan; probably hardy 
3 throughout. There are a great number of Japan 
A pelmatum. ‘Maples, many of them probably varieties of this 
species, others hybrids. The leaves of some are so divided and dis- 
sected as to form merely a fringe or feather. In color they range 
from pure green to the richest reds. . 
12. Acer circinatum, Pursh. (ROUND-LEAVED 
OR ViInE Mapue.) 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. 1 
Wings of the fruit diverging in a straight line. q 
A small tree or tall shrub, 10 to 30 ft. high, of | 4 circinatum. 
spreading habit, with smooth bark, and pale brown twigs; cultivated; 
from the Pacific coast of North America. 
13. Acer Tartaéricum, L. (TARTARIAN 
Mapue.) Leaves ovate, slightly cordate, 
‘rarely lobed, serrated, light-colored, expand- 
ing 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 cul- 
tivated; from Europe. 
A. Tartdéricum. 
Genus 26. NEGUNDO. 
Leaves pinnate, of 3 to 5 leafiets. Flowers rather 
inconspicuous. Fruit a two-winged key as in Acer, in 
drooping racemes. 
