Article from Bean's Trees and Shrubs Hardy in the British Isles
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'Sageretia' from the website Trees and Shrubs Online (treesandshrubsonline.
A genus of no garden merit with about thirty-five species in Asia (as far west as Asia Minor), N.E. Africa, and America, allied to Rhamnus. The generic name commemorates Auguste Sageret, a French botanist (1763–1851). The type of the genus, Sageretia thea (Osbeck) M.C.Johnst. (syn. S. theezans Brongn.), was described by Linnaeus in 1771 from a specimen collected in China by his pupil Osbeck. The odd specific epithet refers to the fact that the leaves of this species were used as a surrogate for tea.