Acer circinatum, 
THE CIRCINAL-LEAVED MAPLE. 
Synony tries. 
Acer circinatum, 
Erable circinal, 
Kreiselnder Ahorn, 
Acero acchiocciolato, 
Round-leaved Maple, 
De Candolle, Prodromus. 
Hooker, Flora Boreali Americana. 
Loudon, Arboretum Britannicum. 
Torkev and Gray, Flora of North America. 
Nuttall, North American Sylva. 
France. 
Germany 
Italy. 
Britain. 
Derivations. The specific name, circinatum, is derived from the Latin circino, to roll, having reference to the manner ol 
he rolling of the leaves. The European names are translations of the botanical one. 
Engravings. Nuttall, North American Sylva, pi. ; Hooker, Flora Boreali Americana, pi. 39 ; Loudon, Arboretum Britan- 
nicum, i., figures 112, et 127, in p. 454 ; and the figures below. 
Specific Characters. Leaves orbicular, rather cordate at the base, 7-lobed, smooth on Doth surfaces , lobes 
acutely toothed ; nerves and veins hairy at their origins. Don, Miller's Diet 
Description. 
HE Acer circinatum, in 
its native country, at- 
tains a height of twenty 
to forty feet. The 
branches are slender, pendulous, and crooked ; 
often taking root in the manner of those of 
many species of ficus, and sometimes of the 
linden-tree. The bark is smooth, green when 
young, and whitish when fully grown. The 
leaves, which are about the size of those of the 
Acer rubrum, are membraneous, heart-shaped, 
with seven to nine lobes, and the same number 
of nerves. They are smooth above, except 
hairs in the axils of the nerves, when young, but 
glabrous when older, and downy beneath, with 
the axils of the nerves woolly. The lobes are 
ovate, acute, and sharply serrated ; the sinuses 
are acute, the foot-stalks rather short, from 
which radiate the nerves to the tip of each 
lobe. The flowers, which appear in April and May, are of a middling size, and 
occur on nodding corymbs, with long peduncles. The fruit has thin, straight 
wings, which are so divaricate as to form right angles with the peduncle. This 
species is very marked, and may readily be distinguished by the regular form of 
its leaves, and their pale, reddish-green colour. 
Geography and History. This tree is common along the west coast of North 
America, between the forty-third and forty-ninth degrees of latitude, and is 
particularly abundant on the great rapids of the river Columbia. Like the Acer 
macrophyllum, it is exclusively confined to the woody, mountainous country 
that skirts the shores, and there forms, among the pine forests, almost impene- 
trable thickets. 
