Douglas's Maple - Acer glabrum var. douglasii
A multiple-stemmed shrub or small tree, Douglas's Maple is primarily a western tree; another subspecies (glabrum) grows at higher elevations than any other maple on the continent. The leaves typically have three lobes and are deep green and yellow to red in autumn. The flowers are greenish-yellow and the fruit is a samara with an acute angle. Found in harsh environments on open slopes, or along streambanks and other moist areas, this species also grows as an understory tree beneath conifers. It can also thrive in cold desert habitats.