Opening/Closure Status

The grounds of the USBG will be closed September 18, 2021. On other days, 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

Britton’s beargrass

Britton’s beargrass (Nolina brittoniana)
Plant Botanical Name: 
Nolina brittoniana

Nolina brittoniana, also known as Britton's beargrass, is endemic to the dry scrub-covered ridges and sand hills of central Florida. Like many plants from the southern United States, it is dependent upon periodic fires that reduce competition from other plants and also release nutrients from burned organic matter into the nutrient-poor soil. This vulnerable plant is threatened by fire suppression and by habitat loss resulting from land clearing for residential development and agricultural production. Currently, efforts are being made to monitor, protect and preserve germplasm from populations of Nolina brittoniana and other threatened plant species that share its habitat.