Bitter vetch is a common name for several plants and may refer to:
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Vicia ervilia, called bitter vetch or ervil, an ancient grain legume crop of the Mediterranean region.
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Vicia orobus, called wood-bitter vetch, a legume found in Atlantic areas of Europe.
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Lathyrus linifolius, called bitter vetch or heath pea, a species of pea.
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Lathyrus niger, called black bitter vetch or black pea, a perennial legume native to Europe.
