sow thistle. It can be distinguished from Sonchus asper and Sonchus hydrophilus in that they both have stiff and leathery leaves, mostly smooth achenes (fruit) with ribs that are rough to the touch or with hairs. Stem leaves are alternate, without hairs, and have lobes that clasp the stem. The Common Sow Thistle's leaf spines aren't as stiff and hurtful. As for the sow thistle’s botanical name: Sonchus is the ancient Greek name for the plant and means “hollow” referring to the plant’s hollow stem, a point of identification. Dandelions and members of the true thistle family, Cirsium, could also be confused with Smooth Sow-thistle, but both of these are edible and the latter has much tougher spikes and leaves, Use as a food Smooth Sow-thistle is best eaten before flowering, after which time the plant becomes bitter. ---Parts Used---Leaves, stems, milky juice.The Sow-Thistle is a well-known weed in every field and garden. Sowthistle plants can be either present as a rosette or upright in their growth form. Terms of use - Privacy policy - Disable cookies - External links policy. Sowthistle plants can be either present as a rosette or upright in their growth form. A thread in the Plant Identification forum, titled SOLVED: looks a bit like Dandelion or smooth sow thistle, but not. Das Substantiv (Hauptwort, Namenwort) dient zur Benennung von Menschen, Tieren, Sachen u. Ä. SOW-THISTLE, COMMON---Synonyms---Hare's Thistle.Hare's Lettuce. Leaves. Plants can grow from 20 to 150cm in height. Flowerheads are pale yellow, 20 to 25 mm, borne in lax clusters. The commoner of the two, the smooth sow-thistle, Sonchus oleraceus has leaves that are weakly and softly spiny, and usually deeply lobed, while those of the rough sow-thistle Sonchus asper are more aggressively spiny, less lobed, or unlobed, and the upper surface is shiny green. Upper stems, branches and involucral bracts (h) surrounding the flower heads usually densely covered with dark hair (j); each hair with a tiny gland (k) at its tip (these hairs, when seen under magnification, resemble a tiny lollipop) (these glandular hairs do not occur in its sister variety, Smooth perennial sow-thistle); flower heads showy, bright yellow, 2.5 - 4 cm across; each head containing only strap-shaped ray florets(like Dandelion flower heads and similar to those of Smooth perennial sow-thistle); seeds brown … thistle : Nonnative, noxious : Light purple to white; multiple small flower heads in clusters on each stem : Whitish underside; spiny-tipped irregular lobes; attach directly to stem : Smooth with no spines; ridged : 1.S -4 feet : Perennial (from crown and rhizomes) Cirsium vulgare ; Bull thistle : Nonnative, not on noxious weed list : Pink to purple; occur in The seeds of sowthistle each possess a pappus, which aids in seed dispersal. Sowthistle plants are erect and fleshy plants that possess hollow, smooth stems that exude milky latex when damaged. The flowers look very much like dandelion flowers, but the unique spiraling arrangement of the leaves up the stem helps with identification. Strain and rinse thoroughly. The species is hermaphrodite (has both male and female organs) and is pollinated by Bees, flies. The May flowerheads are yellow, and the pappuses can be used like the dandelion clock. Rosette leaves alternate, egg-shaped, with toothed margins. Sonchus oleraceus (L.) L. 192 Sow-thistle, Milk weed, Smooth sow-thistle, Annual sowthistle, Common sow-thistle, Common sowthistle, Pualele, Sow thistle, Hare's Lettuce, Milk Thistle, Smooth Saw-thistle, Annual sow thistle, Common milk thistle, Common sow thistle, Hare's-lettuce, Smooth sow thistle, Wild lettuce, Annual sow-thistle, Common annual sow-thistle smooth sow thistle roots. The perennial sow thistle (Sonchus arvensis) is often confused with the annual sow thistle (Sonchus oleraceus). Elsewhere it is an introduced alien plant, and it is considered to be seriously invasive in some countries, including Australia. Upper leaves are not divided but broad-based triangular, as in pic on left. Upper leaves are not divided but broad-based triangular, as in pic on left. swinies. Rosette leaves alternate, egg-shaped, with toothed margins. It is a native biennial commonly found in Europe including the British Isles. Suitable pH: acid, neutral and basic (alkaline) soils. Leaf margins are toothed and only slightly prickly. The genus Sonchus belongs to the daisy family, the Asteraceae. Green matter in grain can increase drying costs and dockage. Both Rough Sow-thistle and Smooth Sow-thistle are similar, but Perennial Sow-thistle has larger, more showy and deeper yellow flowers. Poultices have been made from leaves, while the latex has been used to treat warts. 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