Garden Closed

The United States Botanic Garden (USBG) is temporarily closed to the public to reduce the risk of transmitting COVID-19 coronavirus.

Whenever possible, the USBG will reschedule public programs and events originally scheduled during the closure period. Please monitor the USBG website for updates to operating status. Many resources can still be accessed online, including educational worksheets and manuals, fact sheets and more, and some of our programs will also be made available online. Find online resources at

Maʻo hau hele or Aloalo

Plant Botanical Name: 
Hibiscus brackenridgei
USBG Plant Location: 
Conservatory Room Location: 
Plant Threat Level: 

Hibiscus brackenridgei, the state flower of Hawaii, is an endangered plant endemic to the Hawaiian islands. Unfortunately, there are less than 60 plants in eight populations on the islands of Lanai, Maui, and Hawaii, which are protected by the Endangered Species Act. Threats that include development, overgrazing by livestock and feral animals, as well as competition from invasive weeds have contributed to the drastic reduction in wild populations. Measures being taken by conservationists and botanic gardens to protect the few remaining populations of Hibiscus brackenridgei include weed control, fencing to exclude animals, preservation of remaining intact habitat and conservation of plants and seeds in botanical gardens and seed banks.