an Old World plantain with long narrow ribbed leaves widely established in temperate regions 同义词：English plantain, narrow-leaved plantain, ribgrass, ribwort, ripple-grass, Plantago lanceolata,
any shrub or small tree of the genus Bumelia
a shrub or shrubby tree of the genus Rhamnus; fruits are source of yellow dyes or pigments
The Buckthorns (Rhamnus) are a genus (or two genera, if Frangula is treated as distinct) of about 100 species of shrubs or small trees from 1?10 m tall (rarely to 15 m), in the buckthorn family Rhamnaceae. They are native throughout the temperate and subtropical Northern Hemisphere, and also more locally in the subtropical Southern Hemisphere in parts of Africa and South America.
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