This beautiful flower belongs to Sesbania tomentosa, or 'Ohai, is a native coastal plant from southwestern Oahu.
This species appears in several color varieties from yellow to red, and is considered to be a rare plant species in Hawaii.
You can see 'Ohai along the trail at Kaena Point on Oahu.
If you visit Kaena Point, make sure you follow the posted instructions and warnings. Staying on the trail helps protect the habitat for these and other rare and special plants!
To learn more about this special plant, visit the Hawaii Comprehensive Wildlife Conservation Strategy webpage.
Also, check out the Hawaii Ecosystems At Risk (HEAR) page about Sesbania tomentosa.