Metrosideros polymorpha Gaud.

This photo was in the Kilauea caldera. Ohia is the name of the tree while lehua is the name of the flower. This is the most common native tree on the Big Island and can be found in a variety of habitats. No petals on flowers. Nectar is key food source for many endemic birds.

This photo was taken near Hawaii Volcanoes National Park and shows the typical rain forest of the Big Island: Ohia trees with tree fern understory.