Steeped in history, the USBG is the oldest continuously operating public garden in the U.S., created by Congress in 1820.
www.linkin.bio Instagram.comA new report co-authored by @mortonarb, U.S. Botanic Garden, @bgci_us, @natureserveorg, @u.s.forestservice, and others, completed threat assessments for all 881 native tree species in the contiguous United States, finding 11-16% of tree species in the U.S. are threatened with extinction, with the greatest threats being invasive pests and diseases. They also found that two genera dominate the tree flora of the U.S.: oaks (Quercus) and hawthorns (Crataegus), with 85 and 84 native species, respectively. Oaks and hawthorns were also found to have the most threatened species, with 17 and 29 species, respectively.
The result is a comprehensive checklist and assessment that will serve as a critical baseline to guide future tree #conservation efforts. Until now, most species native to the continental U.S. were not assessed or were outdated.
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