butterweed

but·ter·weed  (btr-wd)

n.

1. A succulent annual or biennial plant (Senecio glabellus), native to the eastern United States and having pinnately divided leaves and bright yellow, radiate flower heads.

2. The horseweed.

Thesaurus

Noun	1.	butterweed - American ragwort with yellow flowers Senecio glabellus, ragwort wild flower, wildflower - wild or uncultivated flowering plant genus Senecio, Senecio - enormous and diverse cosmopolitan genus of trees and shrubs and vines and herbs including many weeds
	2.	butterweed - any of several yellow-flowered plants of the genus Packera; often placed in genus Senecio genus Packera, Packera - genus of American of east Asian perennial herbs with yellow to orange or red flower rays; sometimes included in genus Senecio herb, herbaceous plant - a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests