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Quaking Aspen (Pando)
Bright-yellow quaking aspen grove during autumn
Photography by Deb Snelson / Getty Images
Quaking aspens are technically deciduous trees, but they do flower—albeit rarely. Though their elusive blooms are quite small, the plant itself can be massive. Perhaps the best example of this is Pando, a clonal colony of a single male tree thought to cover 107 acres in Utah. More than 47,000 trees, or stems, have sprouted from a single root system that is thought to weigh about 13 million pounds and be more than 80,000 years old. That makes Pando one of the world's oldest living organisms in addition to being one of the largest.
Quaking aspen also has the widest natural range of any North American tree, spanning 47 degrees of latitude, 110 degrees of longitude (nine time zones), and elevations from sea level to the timber line.2