Chrysanthemum(redirected from Crysanthemum)
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a genus of perennial flowering herbs of the family Compositae, native to the Balkans and the Middle East. They are a common cause of contact dermatitis, and their powdered flowers are insecticidal and scabicidal and a source of pyrethrins.
A perennial herb, the flowers of which are used topically for conjunctivitis and blurred vision, and internally for inflammation, headaches, hearing loss, hypertension, ocular pain, paresthesias, poor vision linked to renal and hepatic dysfunction, vertigo and as a blood tonic.
plant genus in the family Asteraceae; contains sesquiterpene lactones; causes contact dermatitis. Garden plants called also feverfew, marguerite.
the plant from which pyrethrum is extracted. Called also Pyrethrum cinerarifolia.