Acer circinatum


Acer circinatum is a species of maple native to western North America, from southwest British Columbia to northern California, usually within of the Pacific Ocean coast, found along the Columbia Gorge and Coastal Forest. It belongs to the Palmatum group of maple trees native to East Asia with its closest relatives being the Acer japonicum and Acer pseudosieboldianum. It can be difficult to distinguish from these species in cultivation. It is the only member of the Palmatum group that resides outside of Asia.
It most commonly grows as a large shrub growing to around tall, but it will occasionally form a small to medium-sized tree, exceptionally to tall. The shoots are slender and hairless. It typically grows in the under story below much taller forest trees, but can sometimes be found in open ground, and occurs at altitudes from sea level up to.
The leaves are opposite, and palmately lobed with 7 to 11 lobes, almost circular in outline, long and broad, and thinly hairy on the underside; the lobes are pointed and with coarsely toothed margins. The leaves turn bright yellow to orange-red in fall. The flowers are small, in diameter, with a dark red calyx and five short greenish-yellow petals; they are produced in open corymbs of 4 to 20 together in spring. The fruit is a two-seeded samara, each seed in diameter, with a lateral wing long.
Vine maple trees can bend over easily. Sometimes, this can cause the top of the tree to grow into the ground and send out a new root system, creating a natural arch. This characteristic makes it the only maple capable of layering.
It is occasionally cultivated outside its native range as an ornamental tree, from Juneau, Alaska and Ottawa, Ontario to Huntsville, Alabama, and also in northwestern Europe.

Uses

Various birds and mammals eat the seeds of this species.

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