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wide, rough texture and covered with long hairs; edges (margins) lack teeth and lobes . First year rosettes can be controlled with 2,4-D at 2 pints per acre in spring, but second year plants are not controlled well with 2,4-D. For more information or a site-specific recommendation in King County, Washington, contact the noxious weed program. Plants bolt during early summer the second year of growth to a height of 1 to 4 feet and flower in mid-June (Figure 2a). Site of action Group 4: synthetic auxin. All parts of this plant are hairy. … Cynoglossum officinale L. Houndstongue . FEIS ABBREVIATION: CYNOFF SYNONYMS: No entry NRCS PLANT CODE [96]: CYOF COMMON NAMES: houndstongue gypsy… ex Ledeb. Houndstongue is a biennial or short-lived perennial forb that can grow from 1 to 4 feet tall. Als Lectotypus-Art wurde 1913 Cynoglossum officinale L. festgelegt. Responses of Cynoglossum officinale L. and Senecio jacobaea L. to various degrees of defoliation"^ BY A. H. S, H. J. VERKAARt \ I- VAN DI-N HERIK Departntent of Fopttlalioti Biolof^y, Research Crottp Ecology of Plaitis and Herbiv Uiiiversitv of Leiden, P.O. officinale; Cynoglossum officinale subsp. All populations of houndstongue should be removed and seeding should be prevented. Feel free to use and share this content, but please do so under the conditions of our, Houndstongue (Cynoglossum officinale L.) Identification and Control STOP THE SPREAD. For more information, see Noxious weed lists and laws. Appearance Cynoglossum officinale is a biennial plant that can grow from 8-48 in. For larger infestations, chemical control may be more cost-effective than manual removal. Why is this plant a concern? Foliage The first year, the basal leaves are petiolate, elliptical, dark green and 6-8 in. Flower. Houndstongue (Cynoglossum officinale L.) Identification and Control STOP THE SPREAD. Cynoglossum ruderale Salisb. Cynoglossum officinale L. subsp. Our program staff can provide the property owner or appropriate public agency with site-specific advice on how best to remove it. First year plants do not produce flowers. The leaves are alternate, rough, lacking teeth or lobes, and […] Peev (Syn. Clean burs from animals, clothing, shoes and equipment before leaving infested areas. Die etwa 75 Arten der Gattung Cynoglossum sind vorwiegend in den Tropen und Subtropen fast weltweit verbreitet. Some plants may persist for a few years. Systematik und Verbreitung. Leaf stems (petioles) on lower but not upper leaves; leaves decrease in size from bottom to top of plant. (15.2-20.3 cm) long. Houndstongue. Animals may survive for six months or longer after they have consumed a lethal amount before succumbing. For information in other locations, contact your local weed board or extension office or refer to the recommendations in the Pacific Northwest Weed Management Handbook. Figure 2. C. officinale germinated 5% after a 96-h exposure to running water. If plants are cut close to the ground, many plants will not re-grow, although some will and may flower and seed later in the season or the following year. In addition to being a nuisance to recreationists due to its bur-like seeds, houndstongue is toxic and has the potential to poison domestic animals and wildlife that might graze on this plant or eat it mixed in with hay. Toxic. Cynoglossum officinale (hound’s tongue) contains alkaloids with curare-like activity as well as hepatotoxic and carcinogenic pyrrolizidine alkaloids, which are covered in a separate monograph. Mowing will only be effective prior to flowering. Mowing before seed production helps alleviate wool contamination. What is houndstongue’s growth cycle? ( Cynoglossum officinale ) QUICK IDENTIFICATION. Over-grazing and disturbance further encourages the spread and growth of houndstongue. Each plant can produce up to 2,000 seeds which remain viable for up 3 years. (0.2-1.2 m) tall. Bloom. Land Grant. It contains pyrrolizidine alkaloids that stop the reproduction of liver cells and is toxic to cattle, horses, goats and other livestock. Hound’s-tongue is found on dry pasture, roadsides, and logged forestland. Cultural Control and Sanitary Measures. Houndstongue causes a loss of pasture and range for grazing animals, increases cattle marketing costs, and reduces fitness in livestock. Cutting of young rosettes below the crown in autumn or early spring, mowing of flowering stems close to the ground, and ploughing followed by cultivation have been shown to control C. officinale ( Muenscher, 1980 ). Top of plant with flowering occurs the second season of growth ( a ) % after 96-h... 2020, may 30 ] the rosette leaves, are high in toxic alkaloids are. A hound 's tongue ; lance-shaped, 1-12 in that province biennial ( year! 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