0 a tree of the poplar family, with leaves that shake even when there is only a little wind: --
On our walk along the river we passed thundering waterfalls and quivering aspens.
This broad feature is heavily forested with aspen, spruce-fir, ponderosa pine, and pinyon-juniper woodland, and stands in sharp contrast to the arid lowlands encircling it.
Pine and cedar are considered toxic; however, other alternatives to aspen exist (such as sand or various kinds of dirt).
The woodland is dominated by silver birch, with aspen, holly, rowan, sessile oak and wild cherry also present.
Pines and firs, birch, aspen, elm, ash, and lime grow, and oaks occur in small woods all over land.
Flora includes willows, ponderosa pines, aspen, firs, chokecherry and elderberries.
Aspen woodlands support an extensive understory consisting of mid-sized and small shrubs, some herbs and ground cover.
The large grasslands and barrens are dominated by scattered jack pine, red pine, scrub oak, and quaking aspen trees.
The larvae feed on common lilac, green ash, poplar, aspen, cottonwood and trembling aspen.
