Opening/ Closure Status

All outdoor gardens are currently open. The Conservatory and public restrooms remain closed, due to the closure of the U.S. Capitol campus buildings. Please monitor for updates on operating status. USBG resources can be accessed online, including educational materials, virtual tours, and online programs by visiting


Wiliwili flower
Plant Botanical Name: 
Erythrina sandwicensis
USBG Plant Location: 
Conservatory Room Location: 
Rare and Endangered Species
Plant Threat Level: 

Erythrina sandwicensis is known in Hawai'ian as Wiliwili, meaning twisted and referring to the seedpods, which twist open to reveal the bright red seeds. Erythrina sandwicensis naturally grows to about 45 feet tall and the same width. It is one of the few native deciduous Hawai'ian trees and loses it's leaves during the summer to conserve water. Typically, the Wiliwili blooms after the leaves although flowering can vary from the summer through November.