KNAPWEED Synonyms

• annual to perennial herbs or shrubs of eastern United States and Central and South America

• shrubs of western hemisphere often having honey-scented flowers followed by silky thistlelike heads of tiny fruits; often used for erosion control

• North American wild lobelia having small blue flowers and inflated capsules formerly used as an antispasmodic

• annual or perennial herbs with inflated seed pods; some placed in genus Lesquerella

• any of several plants of the genus Physaria having racemose yellow flowers and inflated pods

• any of several hairy North American herbs having yellow racemose flowers and inflated pods

• knapweed; star thistle

• any of numerous composite plants having flower heads with well-developed ray flowers usually arranged in a single whorl

• any of several herbs of the genus Taraxacum having long tap roots and deeply notched leaves and bright yellow flowers followed by fluffy seed balls

• hairy perennial Eurasian herb with yellow daisylike flowers reputed to destroy or drive away fleas

• any of several North American plants of the genus Erigeron having daisylike flowers; formerly believed to repel fleas

• common North American weed with linear leaves and small discoid heads of yellowish flowers; widely naturalized throughout temperate regions; sometimes placed in genus Erigeron

• erect perennial strong-scented with serrate pointed leaves and a loose panicle of yellowish flowers; the eastern United States

• common North American weed with linear leaves and small discoid heads of yellowish flowers; widely naturalized throughout temperate regions; sometimes placed in genus Erigeron

• strike sharply

• break a small piece off from

• widespread European weed having yellow daisylike flowers; sometimes an obnoxious weed and toxic to cattle if consumed in quantity

• American ragwort with yellow flowers

• any of numerous plants of the family Compositae and especially of the genera Carduus and Cirsium and Onopordum having prickly-edged leaves