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 www.USBG.gov for updates on operating status. USBG resources can be accessed online, including educational materials, virtual tours, and online programs by visiting www.USBG.gov/AtHome.
Opening/ Closure Status
Silversword
Printer
PDFPlant Botanical Name:
Argyroxiphium sandwicense
USBG Plant Location:
Conservatory
Conservatory Room Location:
Hawaii
Plant Threat Level:
Threatened
Argyroxiphium sandwicense is endemic to the islands of Maui and Hawaii. Subspecies macrocephalum occurs on Maui, and subspecies sandwicense on the island of Hawaii. There are a total of eight subpopulations, many of which are limited to very few remaining naturally occurring plants.