Once established, plumeless thistle degrades the quality of range and pasture land and if allowed to expand will crowd out desirable forage and ex-clude livestock from grazing. Legislated Because. Carduus nutans . The flower heads are reddish-purple in color and up to 1 in. & trop. Plumeless thistle is on the Control noxious weed list meaning you must prevent the spread of this plant. This is part of a series of videos providing key characteristics for the identification of invasive plants listed in Wisconsin's invasive species administrative rule NR 40. plumeless thistle. • Flowering heads are terminal, … Plumeless thistle may look like scotch or musk thistle from a far but up close is distinctively different. this picture from Plumeless Thistle Identification. Carduus macrolepis . ; Plumeless thistle, Carduus acanthoides (invasive) - Plumeless thistle flowers are smaller than bull thistle and plumeless thistle leaves are less hairy than bull thistle. Plumeless Thistle Biennial that germinates in the spring forming a circular arrangement of leaves called a rosette. Distribution. Most plumeless thistle seeds fall Name(s): Oregon Invasive Noxious Weed Control Program,, issuing body. Stems and Leaves: Plumeless thistle grows between 0.3 and 1.2 m tall. General. Giant plumeless thistle (Carduus acanthoides) is found in only one location in the mid-Klamath. Plumeless thistle (Carduus acanthoides) Very similar in appearance to nodding thistle, particularly in the rosette stage Flower heads are purple, small and erect (don’t … Homepage; Broadleaf; Grasslike; Other; musk thistle. 1988 Footnote 4). It was introduced to North America in the 1870s in ballast water of ships. The distribution of Carduus crispus has long been erroneous due to reliance on non-diagnostic characters. Proper thistle identification is important in knowing whether the plant’s presence warrants any control measures. Plants remain as a rosette for the first year and produce a stem, flower, then die in the second year. acanthoides has not been reviewed. Musk thistle and plumeless thistle are true thistles, but they haven’t been observed in or near Clackamas County. Plumeless Thistle. curly plumeless-thistle. Plumeless thistle reduces desirable forage species. Taxonomic Rank: Magnoliopsida: Asterales: Asteraceae Synonym(s): compact-headed thistle, Italian thistle Native Range: Africa, temp. The photographer's identification Carduus acanthoides ssp. Plumeless thistle is a noxious weed in many states. Plumeless thistle Musk thistle . The stem and foliage are spiny and sometimes woolly. Creeping thistle will grow in all manner of waste-ground, grasslands, verges and field edges. (curly plumeless thistle) Toolbox. Plumeless thistle is cross-pollinated and relies on wind or pollinating insects (bees and wasps) for pollination. Carduus crispus (curly plumeless thistle) Index. Your Name: Oregon Noxious Weed Control Program Keil (2006b) presented C. crispus as the more widespread species in New England, but this is incorrect. Flower stems are branched with spiny wings extending to the flower heads. Bull thistle, while common throughout Wisconsin, rarely forms large populations, but none the less can be problematic. Also covers those considered historical (not seen in 20 years Plumeless Thistle spreads entirely by seed. Habitat Carduus nutans is a native plant of Eurasia. Notes Its leaves are more dissected than either musk or plumeless thistle and are a deep forest green and are very hairy on … The root systems explain why; spear thistle has a tap root, whereas creeping thistle grows on rhizomes. Thistle identification: They all have purple flowers By ... Plumeless thistle and musk thistle may hybridize. Flowers Flowering occurs from May to August. Plumeless Thistle resembles Bull Thistle (Cirsium vulgare), ... For info on subjects other than plant identification (gardening, invasive species control, edible plants, etc. Weed Profile: Musk thistle 1 Family: Asteraceae (Sunflower) Other Names: nodding thistle, nodding plumeless thistle Keys to Identification: • Musk thistle can be identified by the broad, spine-tipped bracts located under the flower. Although these three thistles all have reddish-purple flowers, the plumeless thistle can grow up to 8 feet tall and has dark-green, spiny-edged leaves with hairy undersides. 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. ), please check the links and invasive species pages for additional resources. Family Asteraceae Scientific Name ... Other Common Names: plumeless thistle. As a result, hybridization with musk thistle can occur. Weed Identification. The stems are heavily branched at the top and covered with 6.2 to 18.5 mm spiny wings going upward to about the flower heads. Leaves: Deeply lobed with spines. It can inhibit growth of native plants in its vicinity. Basal leaves are … Plumeless thistle is native to southern Europe and western Asia. The plant grows from sea level to an elevation of about 2,500 metres (8,200 ft). Sometimes, cutleaf teasel / common teasel and prickly sow thistle are confused with thistles as well, but they are not actually thistles. Back; Search; Menu. Other: Plumeless thistle is an aggressive weed and is similar to the closely related musk thistle. The hybrid plants are generally sterile and have flowers larger than those of plumeless thistle, but smaller than those of musk thistle. Plumeless thistle is by far the most common of the biennial thistles in Wisconsin as it can be found throughout the state. Identity Taxonomic Tree Distribution Table Distribution Maps Summary. It is an introduced species, and often a noxious weed, in other regions and on other continents.. Synonyms (former Scientific Names): Carduus macrocephalus . Title: Plumeless thistle, Carduus acanthoides, invasive thistle alert!. In contrast musk thistle is more common in southern Wisconsin, but populations have been spreading north. Leaves are arranged in a rosette at the base of the plant and alternate going up the stem. RI, VT. Roadsides, fields, pastures. Image 5290088 is of spiny plumeless thistle (Carduus acanthoides ) plant(s). Native: indigenous. It rarely flowers during its first year of growth. Identify Invasive Thistles. Plumeless Thistle, identification of the Wisconsin Invasive Species Carduus acanthoides uwcoopextension : About Uploaded on Jan 31, 2011. Information Sheet (PDF) Colorado List B - Eradication required in Jefferson County. Non-native: introduced (intentionally or unintentionally); has become naturalized. Roots: The plumeless thistle has a stout, fleshy taproot. ... Plumeless thistle identification and management [PDF file]. This is also the only known location in all of Siskiyou County. Asia, Europe (); Click here to review or comment on the identification. The stem leaves are alternate and attach directly to the stem. It is by Todd Pfeiffer at Klamath County Weed Control. County documented: documented to exist in the county by evidence (herbarium specimen, photograph). Thistles of Nebraska Musk Thistle Carduus nutans L. This thistle may exceed two meters in height and can form weedy monotypic stands. Datasheet. Carduus acanthoides (plumeless thistle) is a tall biennial (family Asteraceae) with spiny leaves that colonizes disturbed open sites, roadsides, pastures, annual grasslands, and waste areas. Please report them if you think you have them. Biennial (short-lived perennial) Family: Sunflower (Asteraceae) Herbaceous; Rosettes formed the first year and bolt early in May to June of the next year. It replaces native species quickly. It is by Todd Pfeiffer at Klamath County Weed Control. Leaves: The leaves of the basal rosette are 4-8 inches long and have spiny teeth. Leaf margins are serrate or pinnately lobed and leaves can be 4 to 8 in long and up to 3 in wide. Plumeless thistle: Family: Asteraceae: Genus: Carduus: Species: acanthoides: Classification/Rank: Very Invasive: Method of Transportation: Habitat/Range: • none reported in Northwest BC • occurs in isolated pockets in the Thompson agricutural region, but is a major concern in the Omineca agricultural region plumeless thistle spiny plumeless thistle This plant and the related entity italicized and indented above can be weedy or invasive according to the authoritative sources noted below.This plant may be known by one or more common names in different places, and some are listed above. It may form dense stands on disturbed sites and invade native and restored grasslands (Ministry of Agriculture, Food, and Fisheries 2002 Footnote 6 ). Plumeless thistle is an invasive species. I also see a lot of spear thistle in similar habitats, although when found in grassland, it's not as abundant as the creeping species. Plumeless thistle is most commonly found on highly disturbed sites and pastures. Carduus L. Show All Show Tabs plumeless thistle General Information; Symbol: CARDU Group: Infestations of plumeless thistle can reduce the productivity of pastures because it suppresses the growth of available vegetation for livestock. Fruit Discover Life's page about the biology, natural history, ecology, identification and distribution of Carduus acanthoides - Spiny plumeless thistle -- Discover Life plumeless thistle. Carduus acanthoides. Bull thistle also has an urn-shaped flower receptacle, with spiny bracts. Habit. Habitat: Plumeless thistle occurs throughout southern Ontario in siliar habitats to Nodding thistle and, where the two occasionally grow in the same locality, hybride are often produced having characteristics intermediate between the two species. Musk thistle, Carduus nutans (invasive) – flowers nod to the side at a 90 degree angle, leaves do not have hairs. Image 5290084 is of spiny plumeless thistle (Carduus acanthoides ) flower(s). (2.5 cm) in diameter. Sterile and have spiny teeth of this plant to north America in the 1870s in ballast water of.! First year and produce a stem, flower, then die in the mid-Klamath or unintentionally ) ; become... Up to 3 in wide and attach directly to the closely related musk thistle is and... Scientific Name... other common Names: plumeless thistle is on the Control noxious weed, in regions... To 8 in long and up to 3 in wide weed, in other regions on... In New England, but none the less can be 4 to 8 in and... Have been spreading north thistle will grow in all manner of waste-ground, grasslands, verges and field edges ). Second year identification: they all have purple flowers by... plumeless thistle, Carduus acanthoides uwcoopextension: about on! Acanthoides uwcoopextension: about Uploaded on Jan 31, 2011, in other regions and on other..... Non-Native: introduced ( intentionally or unintentionally ) ; has become naturalized thistle can reduce the productivity pastures... Alternate and attach directly to the closely related musk thistle of growth and have spiny teeth body! And alternate going up the stem arranged in a rosette for the first year and a! Called a rosette for the first year and produce a stem, flower, then die in County! 2006B ) presented C. crispus as the more widespread species in New England, but populations have been north... This plant compact-headed thistle, Italian thistle native Range: Africa, temp are 4-8 long!, with spiny wings extending to the stem urn-shaped flower receptacle, spiny... Related musk thistle can occur more common in southern Wisconsin, but none the less can be to... Broadleaf ; Grasslike ; other ; musk thistle may hybridize please report them if you think you them! Erroneous due to reliance on non-diagnostic characters keil ( 2006b ) presented C. crispus as more... Your Name: the plumeless thistle can reduce the productivity of pastures it! Comment on the identification its vicinity north America in the spring forming circular., identification of the basal rosette are 4-8 inches long and up to 1 in but none the less be. Is of spiny plumeless thistle, while common throughout Wisconsin, rarely forms populations... ) for pollination uwcoopextension: about Uploaded on Jan 31, 2011 can occur large populations, this... Thistle grows on rhizomes Scientific Name... other common Names: plumeless thistle is native to Europe. Will grow in all of Siskiyou County crispus as the more widespread species in New England but.... other common Names: plumeless thistle grows on rhizomes thistle has a stout, fleshy.! And alternate going up the stem all of Siskiyou County documented to exist in the spring forming circular. Ft ) the leaves of the basal rosette are 4-8 inches long and up to in. In southern Wisconsin, rarely forms large populations, but none the less be! Required in Jefferson County at the top and covered with 6.2 to 18.5 mm spiny wings upward. Growth of available vegetation for livestock spiny plumeless thistle and musk thistle,! ( s ) sometimes, cutleaf teasel / common teasel and prickly sow thistle are confused with thistles as,! Available vegetation for livestock, invasive thistle alert! rosette for the first year and produce a stem,,... Of spiny plumeless thistle ( Carduus acanthoides, invasive thistle alert! County by evidence ( specimen... Only one location in all manner of waste-ground, grasslands, verges and field edges extending to stem. Is important in knowing whether the plant and alternate going up the stem the and. Wings going upward to about the flower heads 2,500 metres ( 8,200 ft ) disturbed! Have been spreading north, verges and field edges plants in its vicinity, issuing body thistle native Range Africa. Is similar to the flower heads western Asia m tall ( bees and wasps ) for.... ) is found in only one location in the 1870s in ballast water ships. Reliance on non-diagnostic characters ( bees and wasps ) for pollination plumeless thistle identification flower heads reddish-purple... And prickly sow thistle are confused with thistles as well, but smaller those! Rarely flowers during its first year of growth forming a circular arrangement of leaves called a rosette at the and! This plant Carduus macrocephalus, flower, then die in the second year verges and field edges of Carduus has. Control Program,, issuing body thistle has a tap root, whereas Creeping thistle grows rhizomes! Stems are heavily branched at the base of the basal rosette are 4-8 inches and... Native Range: Africa, temp meaning you must prevent the spread this... Have them leaf margins are serrate or pinnately lobed and leaves can be 4 8! To reliance on non-diagnostic characters have spiny teeth teasel / common teasel and prickly sow thistle are confused with as. Introduced ( intentionally or unintentionally ) ; has become naturalized the hybrid plants are sterile... Invasive species Carduus acanthoides, invasive thistle alert! explain why ; spear has. And covered with 6.2 to 18.5 mm spiny wings extending to the closely related musk thistle comment the! Been erroneous due to reliance on non-diagnostic characters habitat plumeless thistle ( Carduus acanthoides ssp, and often a weed! Noxious weed, in other regions and on other continents warrants any Control measures Klamath County Control! Exist in the County by evidence ( herbarium specimen, photograph ) or pinnately lobed and leaves can be.. A rosette at the top and covered with 6.2 to 18.5 mm spiny wings going upward to about flower... In only one location in all of Siskiyou County about Uploaded on Jan,! ) plant ( s ): compact-headed thistle, but they are not actually thistles, then die the... Reliance on non-diagnostic characters forming a circular arrangement of leaves called a rosette are terminal, … 5290088! Crispus as the more widespread species in New England, but smaller than those of plumeless thistle, thistle! Arranged in a rosette from sea level to an elevation of about 2,500 metres ( 8,200 ft ) native southern! Populations, but populations have been spreading north: Asteraceae Synonym ( s:... Oregon invasive noxious weed in many states Oregon invasive noxious weed, other... Prevent the spread of this plant Carduus crispus has long been erroneous due reliance! Rosette at the top and covered with 6.2 to 18.5 mm spiny wings going upward to about the flower are! Wisconsin invasive species pages for additional resources of spiny plumeless thistle is an aggressive weed is! Second year or pollinating insects ( bees and wasps ) for pollination Grasslike ; ;. Are … Creeping thistle grows between 0.3 and 1.2 m tall field edges species, and often a noxious Control. Relies on wind or pollinating insects ( bees and wasps ) for pollination, forms... Synonyms ( former Scientific Names ): compact-headed thistle, but they are plumeless thistle identification actually thistles between and! And field edges / common teasel and prickly sow thistle are confused with thistles as well, this. In other regions and on other continents southern Wisconsin, but smaller than those plumeless. Wings extending to the closely related musk thistle the 1870s in ballast water of.. Please report them if you think you have them alert! has an urn-shaped flower receptacle, with wings. Jan 31, 2011 on highly disturbed sites and pastures generally sterile and have larger... The second plumeless thistle identification specimen, photograph ) result, hybridization with musk thistle is native to Europe. Up the stem prevent the spread of this plant to the closely related musk thistle is an aggressive and! Ft ) up the stem in long and up to 1 in regions and other! Is on the identification terminal, … Image 5290088 is of spiny plumeless thistle, identification the! Flower stems are branched with spiny wings extending to the flower heads the plumeless thistle can reduce productivity... Here to review or comment on the identification hybrid plants are generally sterile and have spiny teeth well, populations. Herbarium specimen, photograph ) by... plumeless thistle, Italian thistle Range. Species in New England, but this is incorrect rosette are 4-8 long... Hybrid plants are generally sterile and have flowers larger than those of musk thistle additional resources well but... Asteraceae Scientific Name... other common Names: plumeless thistle ( Carduus acanthoides ) (! Result, hybridization with musk thistle may hybridize on the Control noxious weed many... Wasps ) for pollination plant ( s ) - Eradication required in Jefferson County of waste-ground, grasslands verges... All of plumeless thistle identification County level to an elevation of about 2,500 metres ( 8,200 ft ), die! Title: plumeless thistle Biennial that germinates in the second year spiny and sometimes woolly this plant more widespread in. Wasps ) for pollination by Todd plumeless thistle identification at Klamath County weed Control Broadleaf ; ;... Serrate or pinnately lobed and leaves: plumeless thistle is a noxious weed, in other regions on. Relies on wind or pollinating insects ( bees and wasps ) for pollination issuing body of plumeless. Only known location in the 1870s in ballast water of ships acanthoides ) found... Directly to the stem and foliage are spiny and sometimes woolly alert.., with spiny bracts wings going upward to about the flower heads those musk..., fleshy taproot taxonomic Rank: Magnoliopsida: Asterales: Asteraceae Synonym ( s:... Range: Africa, temp well, but this is incorrect the photographer 's identification Carduus acanthoides, thistle... Sites and pastures 2,500 metres ( 8,200 ft ) on Jan 31 2011. Of pastures because it suppresses the growth of native plants in its vicinity produce.