Verbena officinalis(redirected from American vervain)
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A perennial herb that contains alkaloids, bitter principles, glycosides (verbenin), tannins and volatile oil. Vervain is antipyretic, antispasmodic, contraceptive and diuretic; it has been used for headaches, skin infections, dysentery, suppressing appetite, increasing breast milk and as a liver and nerve tonic.
n See European vervain.
a genus of plants in the family Verbenaceae.
called also purple top; suspected of causing sickness and abortion in cattle.
contains a glycoside verbenalin reputed to cause contraction of the uterus and photosensitization. Called also common vervain.
thought to cause photosensitization. Called also Verbena venosa, wild verbena.
suspected of causing deaths in chickens and photosensitization in sheep. Called also Mayne's pest.