Acer glabrum var. douglasii
Rocky Mountain Maple
A deciduous shrub or small tree to 10 m tall, native to the western part of the US, from Alaska to Northern California, where it grows in open areas on well-drained soils. It is found along forest and river margins and in canyons and ravines, at altitudes up to 2000 m (7000 ft.). This species presents a straight trunk, with beautiful greyish bark and bright red new shoots, lobed leaves dented along the edges and panicles of yellowish green flowers, followed by winged fruits. For proper germination, the seeds need to be stratified after sowing. A beautiful ornamental, especially during fall, when its foliage changes color to bright notes of red and yellow. Will grow well in temperate climates in USDA Zones 6 to 9.