80 
ROUND LEAVED MAPLE. 
and at the same time perfectly hardy in all temperate cli- 
mates. 
Plate LXVIL 
A leaf of the natural size, a . The raceme of flowers, b. The fruit. 
ROUND LEAVED MAPLE. 
Acer circinatum ; foliis orbiculatis basi subcordatis 1-lobis incequaliter 
acute-dentatis utrinque glabris , nervis venisque ad axillas pilosis . 
Pursii. Flor. Amer. Sept. 1, p. 267. Hooker. Flor. Bor. Am. 1, p. 
112, t. 39. 
Acer circinatum ; leaves cordate, 7 to 9-lobed, the nerves all radiating 
directly from the apex of the petiole ; lobes very acutely serrate, with a 
slender acumination ; corymb few flowered ; petals ovate or linear, 
shorter than the calyx; fruit glabrous, with oblong divaricate wings. 
Torrey and Gray, Flor. Amer. 1, p. 247. 
This remarkable species, like the preceding, is confined 
to a narrow district along the coast of the Pacific, bounded, 
according to the observations of Mr. Douglas, between the 
latitudes of 43° and 49°. It is certain that we did not meet 
with it in any part of Upper California, and it is therefore 
fully as hardy as the preceding. Though much more 
singular in mode of growth and general appearance, it 
has nothing of its imposing grandeur. The trunk, which 
is smooth, only attains the height of 15 to 40 feet. It 
affects the lowest alluvial flats, that escape the influence of 
the periodical inundations to which the rivers it borders 
are subject ; here the stems arise in clusters of 4 or 5 toge- 
ther, conjoined at the root, from whence they spread out in 
wide curves, sending off slender spreading branches, that 
often on touching the ground strike out roots, and give 
rise to offsets so numerous and so entangled, as almost 
