珙桐（Davidiainvolucrata）是我国特有的珙桐科珙桐属植物，起源古老，为第三纪古热带植物区系的孑遗种。
Davidia involucrata is a species that is specially distributed in China and belongs to Davidia and Nyssaceae . It has epibiotic origin and is relic species from tertiary palae-tropical flora .
珙桐属