Plumeless Thistle resembles Bull Thistle (Cirsium vulgare), whose flowers are larger and leaves hairier, but is more closely related to Nodding Thistle (Carduus nutans), whose flowers are also larger and have broad showy bracts. The basal leaves form a rosette and the stem leaves are stalkless and have long, spear-like, terminal lobes. This species is listed as a prohibited noxious weed by the Michigan Department of Agriculture. Flora of North America North of Mexico. Raceae—sunflower family Common Names: Plumeless Thistle, Spiny Plumeless Thistle Scientific Name: Carduus acanthoides L. Legal status Efforts must be made to prevent seed maturation and dispersal of plants into new areas. Flowers. No date. Spiny plumeless thistle is an introduced biennial with stems upward of 1.5 m tall and common to regularly disturbed sites such as margins of roads, ditches, and pastures. Leaves in a basal rosette the first part of the life cycle. Common Names: Plumeless Thistle, Spiny Plumeless Thistle Scientific Name: Carduus acanthoides L. Legal status Efforts must be made to prevent seed maturation and dispersal of plants into new areas. In: Flora of North America Editorial Committee, editors. No date. Download Spiny plumeless thistle stock photos at the best stock photography agency with millions of premium high quality, royalty-free stock photos, images and pictures at reasonable prices. (2.5 cm) in diameter. Other articles where Plumeless thistle is discussed: thistle: …the genus Carduus, sometimes called plumeless thistles, have spiny stems and flower heads without ray flowers. [9][1], species of flowering plant in the daisy family Asteraceae, California Department of Food and Agriculture, "Online Virtual Flora of Wisconsin - Carduus acanthoides", Cal-IPC (California Invasive Plants Council) —, "Exotic Species: Spiny Plumeless Thistle (U.S. National Park Service)", "Plants Profile for Carduus acanthoides (spiny plumeless thistle)", "Plant community associations of two invasive thistles", https://en.wikipedia.org/w/index.php?title=Carduus_acanthoides&oldid=978554927, Short description is different from Wikidata, Creative Commons Attribution-ShareAlike License, This page was last edited on 15 September 2020, at 16:23. This thistle may exceed two meters in height and can form weedy monotypic stands. Carduus pycnocephalus, with common names including Italian thistle, Italian plumeless thistle, and Plymouth thistle, is a species of thistle.It is native to: the Mediterranean region in southern Europe, North Africa, and Western Asia; East Europe and the Caucasus; and the Indian Subcontinent.. plumeless thistle. Carduus acanthoides is native from France, Italy, and western Turkey; through Russia and Kazakhstan; to China. Multi-stemmed biennial (or winter annual) forb to 5 feet tall; openly branched stems erect, spiny-winged from leaf bases; taprooted; plants exist as basal rosettes until flowering shoots develop at maturity. Carduus acanthoides Spiny Plumeless Thistle ID: 0175 3301 3809 0005 © 2001 CDFA 1988 Footnote 4). The flower heads are reddish-purple in color and up to 1 in. Carduus acanthoides. Stems have spiny wings to 1.5 cm wide, and sport wing spines 3 mm long. When in meadows and pastures, grazing animals avoid plumeless thistle and focus on native plants giving the invasive the upper hand. New York and Oxford. Image of natural, bloom, closeup - 46240751 Marsh thistle looks somewhat like spear thistle at an initial glance, but without the large spines and leaf lobes, and usually with a thin, red, leaf margin. Overview Appearance. Possible control methods are explained at these websites: California Department of Food and Agriculture. Family Asteraceae Scientific Name Carduus acanthoides ← → Other Common Names: carduus thistle. Carduus acanthoides, known as the spiny plumeless thistle, welted thistle, or plumeless thistle, is a biennial plant species of thistle in the sunflower family (Asteraceae). Under the flowers are spiny bracts. Carduus acanthoides is an annual or biennial herbaceous plant that grows to 5 ft. (1.5 m) tall. Fall grassland with Carduus acanthoides flowers close up. The leaves are deeply divided and armed with spiny teeth, as is characteristic of thistles. Carduus in Enycyloweedia. Download all free or royalty-free photos and vectors. At least fifteen genera have spiny representatives with "thistle" in their common name. spiny plumeless thistle. The fluffy pappus bristles are 11–13 mm long. Flowers Flowering occurs from May to August. This species is marked by spiny, winged stems. Each plant creates around 1,000 seeds. Fruit is an achene capped with cream-colored bristles. Available at http://www.dnr.state.wi.us/invasives/fact/thistles_plum.htm (accessed 9 March 2010). Overall, it is similar to musk thistle but typically differs in having smaller leaves and flowers and has an erect, winged peduncle. The musk thistle crown weevil, T. horridus , is reported to be very effective against plumeless thistle, although control is reported to take 10 to 12 years. Leaves are arranged in a rosette at the base of the plant and alternate going up the stem. * Flower heads have involucral bracts that are narrowly triangular (less than 2mm wide), have smooth margins, and a short spine-tip. The stem and foliage are spiny and sometimes woolly. Spiny plumeless thistle was first recorded on the east coast of North America in the late 19th century, possibly arriving in ships' ballast (Desrochers et al. Displaces desired crop species. Flower stems are branched with spiny wings extending to the flower heads. The flowering heads are born singly at the ends of slender stems that have longitudinal spiny wings. The plant rarely flowers the first year. DISTINGSUISHING CHARACTERISTIC(S): Spiny wings line the entire stem length, small heads like Canada thistle, but no rhizomes. Huge collection, amazing choice, 100+ million high quality, affordable RF and RM images. The second year, flowering occurs from May - August. 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