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Ragwort is a food plant for the larvae of Cochylis atricapitana, Phycitodes maritima, and Phycitodes saxicolais. Ragwort is best known as the food of caterpillars of the cinnabar moth Tyria jacobaeae. They absorb alkaloids from the plant and become distasteful to predators, a fact advertised by the black and yellow warning colours.
The name "ragweed" is derived from "ragged" + "weed," coming from the ragged appearance of the plant's leaves. [5] Other common names include bursages [ 6 ] and burrobrushes . [ 7 ] The genus name is from the Greek ambrosia , meaning "food or drink of immortality".
Packera aurea (formerly Senecio aureus), commonly known as golden ragwort or simply ragwort, is a perennial flower in the family Asteraceae.. It is also known as golden groundsel, squaw weed, life root, golden Senecio, uncum, uncum root, waw weed, false valerian, cough weed, female regulator, cocash weed, ragweed, staggerwort, and St. James wort.
Jacobaea vulgaris, (common) ragwort or, only in the USA tansy ragwort, a very common wild flower in Europe, widely naturalised elsewhere; Jacobaea aquatica, water ragwort, marsh ragwort; Jacobaea erucifolia, Hoary ragwort; Certain members of the genus Packera including: Packera obovata, Roundleaf ragwort; Packera aurea, golden ragwort
Packera is a genus of about 75 species of plants in the daisy family, Asteraceae. [1] Most species are commonly called ragworts or grounsels. Its members were previously included in the genus Senecio (where they were called aureoid senecios by Asa Gray), but were moved to a different genus based on chromosome numbers, a variety of morphological characters, and molecular phylogenetic evidence.
Packera obovata, commonly known as roundleaf ragwort, [1] spoon-leaved ragwort, [2] or roundleaf groundsel [3] is an erect perennial herb in the Asteraceae (aster) family native to eastern North America. It was previously called Senecio obovatus. Basal and lower leaves are obovate with toothed margins, while upper leaves are pinnately divided.
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Ragweed – Ambrosia. Common ragweed – Ambrosia artemisiifolia; Giant ragweed – Ambrosia trifida; Great ragweed – Ambrosia trifida; Ragwort – Senecio. Common ragwort – Senecio jacobaea; Hoary ragwort – Senecio erucifolius; Marsh ragwort – Senecio aquaticus; Oxford ragwort – Senecio squalidus; Silver ragwort – Senecio cineraria