Sequoioideae

Sequoioideae is a subfamily of coniferous trees in the cypress family, Cupressaceae. It comprises three living species, all of which are commonly known as sequoias. These are the giant sequoia (Sequoiadendron giganteum), the coast redwood (Sequoia sempervirens), and the dawn redwood (Metasequoia glyptostroboides).

The giant sequoia is native to the western slopes of the Sierra Nevada mountain range in California, United States. It is renowned for its immense size, being the largest tree species by volume. The coast redwood, also found in California and extending into southern Oregon, is the tallest living tree species. The dawn redwood, once thought to be extinct, is native to a small region in central China.

These trees are characterized by their reddish-brown, fibrous bark and their adaptation to fire, which plays a role in their reproductive cycle. They are also known for their longevity, with individuals living for thousands of years. Due to their impressive stature and ancient lineage, sequoias hold significant ecological and cultural importance. They are often protected in national parks and forests, attracting visitors from around the world. The subfamily's distinctiveness lies in its massive growth and resilience, making it a unique group within the coniferous flora.