Bastard toadflax or bastard-toadflax is a common name for a plant which may refer to:
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Comandra
''Comandra'' is a monotypic genus containing the single species ''Comandra umbellata''. Its common names include bastard toadflax, umbellate bastard toadflax, and common comandra. The plant has a disjunct distribution; its four subspecies occur i ...
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Thesium humifusum''
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