Rocky Mountain Floristic Region

Sierra Nevada in California. It consists of two provinces, the Vancouverian, which comprises the coastal part of the region for its entire length, including the Pacific Coast Ranges, and the Rocky Mountain, which includes the Rocky Mountains and associated ranges. There are no endemic

Sierra Nevada of California, running between the shore of the Pacific Ocean on the west and the Great Plains on the east, along the Rocky Mountains and Pacific Coast Ranges. It is bordered by the Canadian Province of the Circumboreal Region in the north, by the North American Prairies Province of the North American Atlantic Region in the east and by the Californian Province of the Madrean Region

Pseudotsuga menziesii, as well as the alpine tundra

glaciation during the Pleistocene, its flora, especially in the north, has a far lower degree of endemism than that of the Vancouverian Province. Much of it is shared with the Canadian Province and the Circumboreal Region in general.^[1]