Giant sequoia is a representative plant of the Jurassic Period from 208 million to 144 million years ago. More than 70 million years ago, it spread throughout the Northern Hemisphere, and after the catastrophe of Quaternary glaciers, only a small area on the western slope of the Sierra Nevada Mountains in California, the United States, has preserved a small number of survivors, making it very rare.
The age of giant sequoia is also second to none in the biological world, and the tallest giant fir is more than 5,000 years old and is known as the "World Master".
Giant fir can grow to about 100 meters, the diameter of the bottom of the tree can reach 11 meters, is the largest evergreen coniferous tree among terrestrial plants, the bark is brown, spongy, the epidermis has a deep longitudinal fissure, up to 25 cm thick.
Giant sequoia is an oval-shaped plant with smaller fruits and seeds, and it is said that the weight of 250,000 seeds is not yet one kilogram.
Giant sequoia is also one of the oldest trees in the world, and ordinary individuals can live for more than 3,000 years.
The General Sherman tree in the Sequoia National Park in California, USA, belongs to the giant fir tree species, the age of the tree is about 2300-2700 years old, the beginning of the growth time is similar to the era of Confucius, but Confucius's era is 2500 years ago, the tree is still alive.
The General Sherman Tree is 88 meters tall, and a branch growing at a height of 40 meters is up to 2 meters thick. The bottom of the tree is more than 12 meters in diameter and requires more than 20 people to hold it hand in hand, like a green skyscraper, which is very spectacular.
In 2002, the volume of the General Sherman tree was measured to be 1487 cubic meters, weighing about 1121 tons. The General Sherman tree is known as the "largest tree on Earth" also based on the volume of its trunk.