Definify.com

Webster 1913 Edition

(răg′wûrtˊ)

Noun.

(Bot.)

A name given to several species of the composite genus

Senecio

☞

Senecio aureus

is the golden ragwort of the United States;

Senecio elegans

is the purple ragwort of South Africa.

Noun.

A plant of the genus Senecio.

Senecio barbertonicus

ragwort ‎(countable and uncountable, plural ragworts)

Any of a number of wild flowering plants with yellow flowers in the family Asteraceae, mostly belonging to Senecio and related genera.
- 1653, Nicholas Culpeper, The English Physician Enlarged, Folio Society 2007, p. 237:
  Ragwort is under the command of dame Venus, and cleanses, digests and discusses.