Also called nodding thistle. Carduus species may hybridize with each other. Musk thistle has been reported in nearly every county in Kansas and is found primarily in pastures, rangeland, hay meadows, alfalfa, fallow, roadsides, and waste areas. Bull thistle (Cirsium vulgare; non-native) has prickly winged stems and leaves have prickly hair above, with white wooly hair below. Musk thistle (Carduus nutans) is easily distinguished from other thistles in the state by its silvery leaf margins, and absence of hairs or fuzz and large, nodding flower heads. Crowds out native species and forage for livestock (Zouhar 2002) GRIN-Global. ARS. Wisconsin Department of Natural Resources. Introduced into the United States as an ornamental plant in the mid 1800s. We map all known locations of regulated noxious weeds such as musk thistle in order to help us and others locate new infestations in time to control them. For more information about musk thistle, please visit the website of the Washington State Noxious Weed Control Board (external link). The stem has very spiny wings. National Invasive Species Information Center, Early Detection & Distribution Mapping System (EDDMapS) - Musk Thistle, Fact Sheet: Nodding Thistle (Jan 2014) (PDF | 700 KB), Southeast Exotic Pest Plant Council Invasive Plant Manual - Musk Thistle, Alaska Exotic Plants Information Clearinghouse (AKEPIC): Species Biography - Musk Thistle and Related Thistle Species (Feb 7, 2011) (PDF | 170 KB), Invasive Plant Atlas of the United States - Musk Thistle, PLANTS Database - Nodding Plumeless Thistle, Field Guide: Invasive - Musk Thistle (Nodding Thistle), Invasive Plants in Pennsylvania: Musk Thistle (PDF | 254 KB), Natural Resources Series: Range - Musk Thistle. Musk thistle is native to Europe and Asia, as with all species of Carduus (in contrast with Cirsium, of which there are about 100 native thistle species in the US). Bull, musk and plumeless thistle (Cirsium vulgare, Carduus nutans and acanthoides) germinate in the summer and fall and overwinter as a rosette. Center for Invasive Species and Ecosystem Health. The .gov means it’s official.Federal government websites always use a .gov or .mil domain. Musk Thistle a.k.a. The stems of the native species do not have … Noxious Weed Program. Many insects feed on the leaves, stems, flowers and seeds, while some songbirds also feed on thistle seeds. Musk thistle generally is not a prob lem in cultivated cropland, but may germinate and develop in fallow fields or after winter wheat is planted in the fall. Second year plants usually bolt in late May. Before sharing sensitive information online, make sure you’re on a .gov or .mil site by inspecting your browser’s address (or “location”) bar. One plant can set up to 20,000 seeds. Bull thistle is erect, 2 to 5 feet tall with many spreading branches, spiny wings from leaves. Wheeler's thistle Look-alike native plants: Wheeler’s thistle (Cirsium wheeleri) with purple looks similar to Musk thistle. Avoid handling without gloves. Thistle plumes, especially musk thistle (Carduus nutans L.) pappus, were used to make paper during the 18th century. https://www.fs.fed.us/database/feis/plants/forb/carnut/all.html Identify the musk thistle (Carduus nutans), which is commonly found invading pastures, fields and meadows, by its hairless, spiny and alternately arranged leaves that have spiky and silvery edges. Seen it? musk thistle) is important for identification. Goldfinches feed on several thistle species, and bees utilize the plants to make an especially sweet honey. Measure whether bracts collectively are greater than or less than 0.8 inches high, referring to the white bracket in Figure 2 for the length to measure. Canada thistle (Cirsium arvense; invasive) does not have a winged stem or spines on its stem or flower heads. California Department of Food and Agriculture. Please notify us if you see musk thistle growing in King County. It was first introduced into the United States in 1852 in Pennsylvania. University of Nebraska - Lincoln. :1 noxious weed throughout Kansas in 1963. Musk thistle is a large, spiny biennial with rose-purple flower heads up to 2½ inches wide. Department of the Environment and Energy. Google. Measure the width of the flowering head, referring to the black bract in Figure 2 … Musk thistle identification and control Carduus nutans This Class B noxious weed occurs in abundance in some parts of Washington State and is rare in others. How to identify The Musk thistle has a large, nodding, thistle-like flower head on each stem that comprises bright pink florets (tiny flowers) fringed by spiny bracts (leaf-like structures). Alberta Invasive Species Council (Canada). Its larvae feed on developing seed within the flower head. Musk thistle is also referred to as nodding thistle. It invades open natural areas such as meadows, prairies, and grassy balds. Numerous flower heads are produced from May to October, depending on the species. Provides state, county, point and GIS data. Lobed, serrate leaves; serration shallower than plumeless thistle. Its leaves are divided with spiny lobes, and its stems are winged and cottony. Many native birds and insects utilize the various thistle species as a food source and for materials to build nests. It begins to disseminate seed from a head about two weeks after it first blooms. However, musk thistle can be distinguished from other thistles by its large, disk-shaped, apical flower heads. It spreads rapidly in areas subjected to frequent natural University of Alaska - Anchorage. Carduus nutans, with the common names musk thistle, nodding thistle, and nodding plumeless thistle, is a biennial herb in the Asteraceae—sunflower family. The section below contains highly relevant resources for this species, organized by source. – Nodding thistle, Nodding Plumeless thistle Scientific name: Carduus nutans L. Family: Asteraceae (Sunflower family) Description Origin: Eurasia. Program offices are located at 201 S. Jackson St., Suite 600, Seattle, WA 98104. Musk thistle produces many heads. Musk thistle was introduced into the eastern United States in the early 1900s and is a well-known rangeland pest in the US. Musk thistle was declared ! Tasmania Department of Primary Industries, Parks, Water, and Environment (Australia). HABITAT IN THE UNITED STATES Musk thistle grows from sea level to about 8,000 ft elevation, in neutral to acidic soils. Musk thistle can grow up to 7 feet tall and flowers with 50 to 100 reddish-purple blooms that are each 2 to 3 inches wide. Musk and plumeless thistles hybridize and are very similar in … Nodding terminal compound pink-purple flowers May to August. Height to 10 ft.; rosette first year. Stems of musk thistle grow to 0.5-2.0m (1.5-6ft) tall, and are highly branched and spiny throughout. Similar species: Native marsh thistle (Cirsium muticum) has non-spiny stems and flower heads. Seeds: A single plant can produce up to 120,000 seeds annually, with seeds remaining viable in the soil up to 5 years. Musk thistle likely is the most easily identified invasive thistle in North Dakota, yet many people confuse this plant with either bull thistle or plumeless thistle. Musk thistle (Carduus nutans)Author: George Beck, Colorado State University Cooperative Extension Adapted from the Colorado State University Extension Natural Resources Fact Sheet "Musk Thistle"Identification and Life Cycle. Musk thistle is one of 12 state-wide noxious weeds in Kansas infesting over 700,000 acres. Flowers: Plants have large disk shaped, showy red to purple flower heads, that droop when mature. Musk thistle (Carduus nutans) is a biennial herbaceous plant, between one to seven feet tall. ]), also non-native in the US. be78ff24e6fc44c48948f1fc68f22c4b. The terminal, or tallest, shoots flower first, then lateral shoots develop in leaf axils. The single or clustered purple flowers, 1.5-2” across, are borne at the ends of … Musk Thistle. Musk thistle now occurs throughout most of the United States and is found in nearly all 105 Kansas counties. The problem is ….This prickly weed reduces the quality of grazing land. Most King County offices will be closed on December 25, for Christmas Day. Musk Thistle he musk thistle or nodding thistle (Carduus nutans L.) is usually a bien- nial or winter annual, but it occasionally occurs as a sum- mer annual. Leaves have few hairs, and typically the margins are greyish, giving the plant a … Cultural, mechanical, biological and chemical control methods have all been used on musk thistles with varying degrees of success in different parts of the country. Musk thistle is a prolific seed producer. This site is also protected by an SSL (Secure Sockets Layer) certificate that’s been signed by the U.S. government. Its scientific name is Carduus nutans L. of the family Asteraceae (Sunflower family). Foliage Leaves are green and lanceolate to oblong-lanceolate. The following spring, biennial thistles resume vegetative growth, bolt and then flower. See also: Included on California's noxious weed list; see. Conservation Services Division. Appearance Carduus nutans is an herbaceous, biennial plant that grows to 6 ft. (1.8 m) tall. Musk thistle (also known as nodding thistle) overwinters in the rosette stage, four to eighteen inches wide. Musk thistle is also known as nodding thistle and nodding plumeless thistle. University of Arkansas. Rosette formed first year; flowering stem el… Become a certified small business contractor or supplier, Find certified small business contractors and suppliers, Washington State Noxious Weed Control Board. Musk thistle is a non-native biennial forb but can behave occasionally as an annual. and bull thistle (Cirsium vulgare [Savi. A robust plant may produce 100 or more flowering heads.Musk thistle flowers over a seven- to nine-week period. The musk thistle weevil was introduced as a biological control agent in the 1980’s and is common across the state. Carduus nutans - Asteraceae Family - Biennial. Musk thistle is primarily a biennial or winter annual species. Accidental, possibly through ballast water (, Crowds out native species and forage for livestock (. Our program staff can provide the property owner or appropriate public agency with site-specific advice on how best to remove it. Native thistle provide important habitat and food sources for native fauna. Cooperative Extension Service. The https:// means all transmitted data is encrypted — in other words, any information or browsing history that you provide is transmitted securely. Purple flowers are the identifying factor among the three species. Maps can be downloaded and shared. Pennsylvania Department of Conservation and Natural Resources. Spines at the end of each lobe, the tip spine is white. Cooperative Extension. National Genetic Resources Program. To contact staff, see the Noxious Weed Control Program Directory, send an email, or call 206-477-WEED (206-477-9333). Musk thistle is similar to Canada thistle (Cirsium arvense [L.] Scop.) Report it! Australian Government. The plant forms basal rosettes during its first year, which have deeply lobed leaves that are up to 10 inches long and 4 inches wide, … The nectar and pollen of native thistles are incredibly valuable food sources to bees, butterflies, and other pollinators. Information. Musk thistle is a biennial thistle that is a rosette of leaves in its first year and sends up a flowering stalk in its second year, then dies. Musk thistle often grows in excess of 6 feet tall, has very large flowers that tend to droop, and the flower has … Yellow to … USDA. Musk thistle is found throughout the U.S. except for Maine, Vermont, Florida, Alaska and Hawaii. Alaska Center for Conservation Science. ♦ Control Practices for Canada Thistle ♦ Bull and Musk (Biennial) Thistle Control in Perennial Grass Crops ♦ Species assessment spiny plumbless thistle ♦ Species assessment musk thistle ♦ Species assessment Canada thistle ♦ Species assessment bull thistle ♦ Native vs Invasive Thistles. Through the app or online. Or, to display all related content view all resources for Musk Thistle. Musk thistle is also sometimes called "nodding thistle" because the flower heads can droop to a 90 degree angle instead of facing toward the sky. MUSK THISTLE CONTROL INTRODUCTION Musk thistle is an introduced invasive broadleaf weed native to Europe, Siberia, Asia Minor and North Af-rica. Colorado Department of Agriculture. New South Wales Department of Primary Industries (Australia). and triangular (e.g. Washington State Noxious Weed Control Board. The stems are commonly winged with spiny leaf tissue. However, only one-third of the seeds are viable. A species profile for Musk Thistle. University of Georgia. It has spread quickly throughout much of the Midwest, but is not yet common in Ohio. These native thistles are shorter and smaller than Musk thistle with more delicate stems and rosettes. 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