sow thistle

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Related to Sonchus asper: Sonchus oleraceus, Sonchus arvensis

sow thistle

 (sou)
n.
Any of various plants of the genus Sonchus of the composite family, native to Eurasia and Africa but widespread as weeds, having prickly leaves, milky sap, and yellow flower heads.

sow thistle

(saʊ)
n
(Plants) any of various plants of the Old World genus Sonchus, esp S. oleraceus, having milky juice, prickly leaves, and heads of yellow flowers: family Asteraceae (composites). Also called: milk thistle, puha (NZ) or rauriki (NZ)
[C13: from sugethistel, perhaps variant of Old English thugethistel, thuthistel thowthistle, a dialect name of the sow thistle. See sow2, thistle]

sow′ this`tle

(saʊ)
n.
any composite plant belonging to the genus Sonchus, esp. S. oleraceus, a weed having thistlelike leaves, yellow flowers, and a milky juice.
[1200–50; Middle English sowethistel, earlier sugethistel. See sow2, thistle]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.sow thistle - any of several Old World coarse prickly-leaved shrubs and subshrubs having milky juice and yellow flowerssow thistle - any of several Old World coarse prickly-leaved shrubs and subshrubs having milky juice and yellow flowers; widely naturalized; often noxious weeds in cultivated soil
genus Sonchus, Sonchus - sow thistles
Sonchus oleraceus, milkweed - annual Eurasian sow thistle with soft spiny leaves and rayed yellow flower heads
bush, shrub - a low woody perennial plant usually having several major stems
References in periodicals archive ?
Sonchus asper was infested by eight aphid species and was followed by Tagetes minuta, Galinosoga perviflora and Chenopodium album that were infested by 7, 6 and 5 aphid species respectively.
The moderately frequent species Eclipta alba, Amaranthus viridis, Sonchus asper, Kochia indica, Suaeda fruticosa, Euphorbia pilulifera, Boerhavia diffusa, Medicago polymorpha, Melilotus parviflora, Plumbago zeylanica, Cenchrus pennisetiformis, Dicanthium annulatum, Eragrostis poaeoides, Poa annua, Malvestrum tricuspidatum and Solanum nigrum showed AF of 25-30% and RF of 1.