This is our celebrated tree of fall, the quaking aspen so named for those leaves that flicker in the breeze, twinkle in the sun and stir our souls. Maybe you didn't know that about the name.

All skill levels and mediums are welcome; 1 p.m. Monday, NoBo Art Center, 4929 Broadway, #E, Boulder; $25; artofmodeling.org.

Aspen trees can thrive in a variety of conditions including sandy soil, gravel, dry grasslands and elevations from 6,500 feet to 11,500 feet. But one thing they cannot go without is abundant sunshine.

Why are they banned?: Bradford pears are banned in Ohio. Learn why, what they look like, what to plant instead 2. Aspen tree As the weather cools down, the tall Aspen turns into a brilliant gold.

The professors concluded: “Quaking aspen, the most widespread tree species in North America, can now take its rightful place as an acknowledged giant among giants.” 4. It spreads far and wide ...