Acer glabrum

Source: www.nwplants.com

Botanical Name: Acer glabrum
Common Name: Douglas Maple; Rocky Mountain Maple
Family: Aceraceae
Type of Plant: Broadleaf deciduous tree
Habit: Often multi-stemmed, upright
Growth Rate: Slow
10-Year Height: < 6
Mature Height: 30 feet
Leaves: Opposite, simple, 3-5 lobes (occasionally divided into 3 leaflets, more common in moist areas), coarsely double toothed, green above, blue-green below. Petiole long, slender, often red. Fall color yellow.
Flowers: Dioecious. Yellowish green, with 5 petals. April-May.
Fruit: Wings nearly parallel.
Buds/New Growth: 
Stem/Bark: 
Culture: Sun to part shade. Found along streams and other moist sites.
Pruning: 
Pests/Diseases: 
Landscape Uses: Native planting. Erosion control.
Additional Information: 

Acer circinatum

Source: www.nwplants.com

Botanical Name: Acer circinatum
Common Name: Vine Maple
Family: Aceraceae
Type of Plant: Broadleaf deciduous tree
Habit: Multi-stemmed, shrubby, spreading, sprawling and vine-like in forest shade but bushy and dense in sun. Can bend over easily, which can sometimes cause the top of the tree to grow into the ground and send out a new root system, creating a natural arch.
Growth Rate: Fast
10-Year Height: > 10
Mature Height: 16 - 26'
Leaves: Opposite, simple, almost circular in outline, heart-shaped at base, (5)7 to 9(11) lobed, lobes unequal or doubly toothed.  In sun develops red, orange, and yellow fall colors.
Flowers: In clusters of 3-6, perfect or staminate (male), long stalk, sepals deep red, petals greenish white, 6-10 stamens. April-May
Fruit: Wings horizontally spread, deep red at maturity.
Buds/New Growth: New growth and branchlets are a soft green while older growth becomes reddish-brown.
Stem/Bark: Bark is usually smooth, but is also sometimes finely fissured.
Culture: Sun or deep shade. Prefers moist, shady conditions, but tolerates sun.
Pruning: 
Pests/Diseases: 
Landscape Uses: Native plantings, shade tree. Low water requirements makes them attractive in xeriscapes.
Additional Information: 
Google images of Ace circinatum