Basic Of Fishing

Sonchus asper Prickly Sow-thistle identification

The Smooth Sow-thistle Sonchus oleraceus is similar but its leaves are generally greyer and without sharp spines. Smooth Sow-thistle and Common Sow-thistle often hybridise resulting in plants with slightly prickly leaves. There are many other yellow members of the daisy family with flowers similar to those of the Dandelion.Sonchus asper or Prickly Sowthistle is a spring or summer annual herbaceous wildflower with spiney leaves and yellow flowers and is often considered a weed because of its aggressive spread.Sonchus asper Common name s Prickly Sow Thistle Rough Milk Thistle and others Synonyme s N A Family Asteraceae Origin Asia Europe More infos Short to tall plant hairless except for a few glandular hairs on the upper stem. Stem angled often reddening sometimes branched to 1.2 metres. The upper leaves are shiny green and prickly they clasp the stem with rounded basal lobes. Flowerheads golden yellow 20 to 25 mm in lax clusters bracts without glandular hairs.Spiny Sowthistle Sonchus asper is very similar in appearance however this species has rounded lobes that clasp the stem whereas annual sowthistle has distinctly pointed lobes. Also the leaf margins of spiny sowthistle are much more spiny or prickly than those of annual sowthistle.

The prickly sow-thistle Sonchus asper is similar but its leaves are generally greener and with sharper spines. Smooth Sow-thistle and Common Sow-thistle often hybridise resulting in plants with slightly prickly leaves. There are many other yellow members of the daisy family with flowers similar to those of the Dandelion.Sonchus asper is an annual herb considered native to Europe Africa and Asia that has been introduced to a wide range of countries around the world where it frequently becomes an environmental and agricultural weed. The species grows in a wide range of habitats and climates and produces large numbers of seeds 20 000 seeds which are easily dispersed by wind and water but also as That s the Prickly Sow Thistle also called Spiny Leaf Sow Thistle SONCHUS ASPER. This plant s spiny leaf margins help us identify it as well as its composite-type flower heads which look like small Dandelion heads as shown below Prickly sow thistle scientifically known as Sonchus asper is a dicotyledonous perennial or annual herb in the Asteraceae Compositae Aster family .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. Although grazing animals and butterflies actually prefer the Sonchus to grass farmers rant about the plant because it s a weed amongst their crop.

Sonchus oleraceus or Sowthistle is a genus of annual herbs considered a winter and summer weed and includes several species that are common in nurseries and landscapes. Most of the species are annual herbs but a few are perennial and a few are even woody. The species can overlap the winter and summer annual categories.Sonchus asper the prickly sow-thistle rough milk thistle spiny sowthistle sharp-fringed sow thistle or spiny-leaved sow thistle is a widespread plant in the dandelion tribe within the daisy family.ID Leaves glossy above not greyish-green looking like thistle leaves. All flowerheads under 30 mm across.Common sow thistle has hollow stems that exude latex if damaged. It has a short taproot and deeply lobed leaves. 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.Sonchus asper L. Weed Type Annual Broad-leaved Weeds. Occurrence Prickly sow-thistle is a troublesome annual or overwintering weed common on arable land. It is also found in gardens on roadsides waste places and other disturbed habitats. It is recorded up to 1 500 ft in the UK. Prickly sow-thistle grows on most soils but prefers well

Annual Sowthistle Sonchus oleraceus is very similar in appearance however this species has distinctly pointed lobes that clasp the stem whereas spiny sowthistle has rounded lobes. Also the leaf margins of annual sowthistle are much less spiny or prickly than those of spiny sowthistle.There are three forms of the tall dandelionlike noxious weed called the sow thistle Sonchus arvensis or perennial sow thistle Sonchus oleraceus or annual sow thistle and Sonchus asper the spiny annual sow thistle. All three sport spiky serrated leaves in a dense basal rosette in spring which rises up to a Sonchus asper L. Hill subsp. asper. NATURALIZED. Habit Annual 1--12 dm. Stem mostly unbranched proximal to inflorescence. Leaf basal tapered to generally sessile bases cauline 6--30 cm distal often widest near base proximal clasping lobes rounded strongly curved to coiled blades dentate sometimes - lobed teeth and lobes soft-spine Upper leaves are up to 6 inches long with a rounded widely lobed auriculate base semi-clasping the stem. Lower leaves are up to 10 inches long and 3 inches wide more spatula shaped with deeper lobes. All leaves are coarsely toothed with soft spines and are shiny waxy green on the upper surface. Stems are lined or grooved green or reddish Prickly Sowthistle Sonchus asper Aster family Asteraceae Description This plant is a spring or summer annual usually the former that becomes 1-3 tall branching sparingly in the upper half. The stems are dull green or reddish green round and smooth. They have rather conspicuous longitudinal veins and are usually hairless although occasionally the upper stems and flowering stalks have

C. Prickly Sow-thistle Sonchus asper This native species has leaves that are often undivided but with sharp spines and clasping the stems with rounded lobes. The May flowerheads are yellow and the pappuses can be used like the dandelion clock. A Species Category B Species Family C SpeciesSeeds are small around 0.1 inches long with ridges on each side. May Be Confused With May be confused with prickly sow thistle Sonchus asper common sow thistle Sonchus oleraceus and though shorter common dandelion Taraxacum officinale . If you need help with plant identification please contact your county noxious weed coordinatorThe genus Sonchus includes approximately 60 species and three of them have become common weeds throughout the world. These are S. arvensis perennial sow thistle and the two annual species S. oleraceus common sow thistle and S. asper prickly sow thistle.The sow-thistles are not always easy to distinguish especially using dry specimens. Many collections lack indication of underground parts the sure feature to recognize the deep-rooted perennial S. arvensis which one cannot pull easily from the ground. Plants with the biggest heads and longest involucres are this species.Short to tall greyish plant. Upper leaves clasp the stem with triangular leaves with pointed basal lobes. Flowerheads pale yellow 20 to 25 mm borne in lax clusters.

mile s id Common Name Latin Name here all 0.00 Begin guide at parking lot below South Field Station elevation 560 feet 170 m only a few notable species not found subsequently are given here until the end of the orchard.The commonest ones are the annual prickly sow thistle Sonchus asper and smooth sow thistle Sonchus oleraceus and the perennial perennial sow thistle Sonchus arvensis . They all produce lots of wind-blown seeds that easily spread them all over the garden making them a nuisance and a problem to control.Spiny sowthistle Sonchus asper L. Hill. Family Asteraceae Composite family Life cycle Annual Native status Introduced to N. America Habitat Waste areas General description Initially forms a basal rosette of leaves the stem elongates into erect unbranched plant.Leaves are glossy variably lobed or toothed with prickly margins with a rounded auricle clasping the stem.Sonchus asper Adams 4153 internal transcribed spacer 1 5.8S ribosomal RNA gene and internal transcribed spacer 2 complete sequence. 641 bp linear DNA. Accession AY458004.1 GI 38492146. Sonchus asper Keighery 14312 internal transcribed spacer 1 5.8S ribosomal RNA gene and internal transcribed spacer 2 complete sequence.