Monroe (tree) Flint and Mike Law; they calculated its volume to be , this is larger than the famed Grizzly Giant tree in Mariposa Grove yet it is still less than the General Sherman Tree, largest of all sequoias. Giant Forest, famed for its giant sequoia trees, is within Sequoia National Park. The forest, at over 6,000 feet (1,800 m) in elevation, is located in the western Sierra Nevada of California. Four out of the ten largest trees by volume on the planet are said to be within the Giant Forest. The largest, the General Sherman tree, measures 36.5 feet (11.1 m)
Largest organisms over . The largest organism in the world, according to mass, is the aspen tree whose colonies of clones can grow up to five miles long. The largest such colony is Pando, in the Fishlake National Forest in Utah. Another form of flowering plant that rivals Pando as the largest organism on earth in breadth, if not mass, is the giant marine plant, "Posidonia oceanica", discovered in the Mediterranean near the Balearic Islands, Spain. Its length is about . It may also be the oldest living organism in the world, with an estimated age of 100,000 years. Green algae are