Coniferophyta contains 550 species in 6 families. The temperate Northern Hemisphere has conifer forests. Russia has conifer forests. The world’s largest conifer forest is located in Siberia and is the world’s largest biome. Bristlecone pine is the oldest tree in the world. Its age is 5000 years. It is found in Navana and California. The tallest trees in the world are Hyperion (Sequoia sempervirens) at ± 400 feet and Coast Redwood (Sequoia gigantea) at 324 feet.