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Thistle - Wikipedia, the free encyclopedia
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Thistle is the common name of a group of flowering plants characterised by leaves with sharp prickles on the margins, mostly in the family Asteraceae. Prickles often occur all over the plant - on sur...
en.wikipedia.org/wiki/Thistle
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Perennial sow-thistle is a creeping rooted perennial growing 0.4 to 1.5 metres tall; stems branch near the top; leaves with weak marginal prickles clasp the stem; plants contain a bitter milky juice; upper stalks and flower bracts usually covered in gland-tipped hairs;
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www.agf.gov.bc.ca/cropprot/weedguid/sowthist.htm
www.agf.gov.bc.ca/cropprot/weedguid/sowthist.htm
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Appearance: Perennial herbaceous plant, 2 - 5' tall erect, single stem, branches near the top into several flower stalks. Broken stems emit a sticky milky bitter juice with a sour odor. ... Perennial sow thistle (Sonchus arvensis) ... Sow thistle is on the MDA Prohibited noxious weeds list in Minnesota.
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www.dnr.state.mn.us/invasives/terrestrialplants/herbace...
www.dnr.state.mn.us/invasives/terrestrialplants/herbaceous/perennialsowthistle.html
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Sow-Thistle, Common ... The Sow-Thistle is a well-known weed in every field and garden. It is a perennial, growing from 1 to 3 feet high, with hollow thick, branched stems full of milky juice, and thin, oblong leaves, more or less cut into (pinnatifid) with irregular, prickly teeth on the margins.
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www.botanical.com/botanical/mgmh/s/sowthi71.html
www.botanical.com/botanical/mgmh/s/sowthi71.html
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Annual Sowthistle: Sonchus oleraceus ... Weed Description: An annual with bluish-green leaves and stems that secretes a milky sap when cut. Found throughout the United States. ... Seedling: Cotyledons egg-shaped and have petioles. Young leaves are alternate, egg-shaped, and form a rosette. Both young leaves and cotyledons have...
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www.ppws.vt.edu/scott/weed_id/sonol.htm
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Culpeper's Complete Herbal, herbal remedies, common sow-thistle ... Description. The leaves of this kind half embrace the stalk, which is also tender, hollow, branched, and of a light green, and two feet high. The cups are smooth, the leaves are of a fresh fine green, and full of a milky juice. ... Place. This is an annual;
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www.complete-herbal.com/culpepper/commonsowthistle.htm
www.complete-herbal.com/culpepper/commonsowthistle.htm
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Sow Thistle, Prickly Sow Thistle, Thistle,So ... Plant Image Gallery Home • Forbs • Grasses & Grasslike Plants • Trees, Shrubs & Woody Vines • License Information...
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www.noble.org/imagegallery/Forbhtml/SowThistle.html
www.noble.org/imagegallery/Forbhtml/SowThistle.html
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Thus, long-term goals in thistle management emphasize biological and cultural controls, although emergency intervention with chemical or mechanical controls may be necessary. IDENTIFICATION AND BIOLOGY OF THISTLES;
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www.nature.nps.gov/biology/ipm/manual/thistle.htm
www.nature.nps.gov/biology/ipm/manual/thistle.htm
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