Douglasii
Acer glabrum (AY-ser GLAH-brum)
Rocky Mountain maple is a deciduous shrub or small shade tree in the maple family (Sapindaceae) and is native to western North America from Alaska south to California and west to Nebraska and south to New Mexico. The specific epithet means smooth, without hair, referring to its smooth stems and leaves. The species is named after David Douglas, a Scottish botanist who in addition to this tree, is also known for the Douglas fir. This tree will grow 12-30 feet in height and spread 10 to 20 feet wide. It usually has a multi-trunk habit and a shrub-like growth and a narrow crown in more open areas. It can be tall and spindly in closer stands of trees. Can withstand sandy, loamy, and heavy clay acidic soils, prefers well-drained soil and needs lots of organic matter. It performs best in semi-shade to shade. Plant in a location sheltered from strong winds, frost, and afternoon sun. This is a relatively low-maintenance tree, and should only be pruned in summer after the leaves have fully developed, as it may 'bleed' sap if pruned in late winter or early spring. There are four varieties with distinct distributions. They are listed below. It is primarily grown for its ornamental red fruit in the late summer and fall and its interesting red twigs that stand out, particularly in the winter. The fall color is knock-out yellow-to-red. Works well for erosion control, in a woodland garden and as an understory tree. Best grown in its native habitat and would not be appropriate for the southeast. Insects, Diseases, and Other Plant Problems: No significant insect or disease problems. In alkaline soils, it can develop manganese chlorosis. Watch for aphids, leafhoppers, borers, scale, and caterpillars. Also note that verticillium wilt attacks the vascular system and can be fatal. Canker, fungal leaf spot, and root rots may also occur. Wind and ice may break some branches. The Clemson Cooperative Extension Home and Garden Information Center has a factsheet on common maple diseases and insect pests. More information on Acer .
Source: NC State Extension Gardener Plant Toolbox ↗ NC State Extension Gardener Plant Toolbox, 61 attributes.
How it fits the guild