It may seem strange to call the aspen tree a flower, but it does appear in my Falcon Guide Central Rocky Mountain Wildflowers.

“Aspen’s leaves (as distinct from birches’) are rounded or heart-shaped in outline, with vertically flattened pettioles (leaf stalks) that are responsible for their distinctive trembling, rotating action in the slightest breeze.

“Aspen is a colonial tree that spreads by shallow underground stems. Patches of aspen trees are often just vertical stems (clones) of a single genetic individual. The borders of the clone patches are often obvious in the spring and fall, when the genetic differences in leafing out and fall coloration are expressed between clone patches. The underground stems enable aspen to survive forest fires with ease. Aspen twigs are a favorite food for browsing deer, elk, and moose, especially in winter.” (page 246)

Here’s a path leading past Silver Sage into an aspen grove (clone patch? Or between clone patches? I’m sticking with grove – sounds less disturbing).