Comments: becoming gradually smaller as they ascend the stems. more tolerant of shade than other thistles. Identify the tall thistle (Cirsium altissimum) by its extreme height, with stems that grow up to 10 feet tall, making it one of the tallest thistle species. Sphinx moths, including hummingbird clearwing moths (Hemaris spp.). It produces yellow flowers with red veins borne in spiny heads. purple thistle bud image by Roman Ivaschenko from Fotolia.com Identify the tall thistle (Cirsium altissimum) by its extreme height, with stems that grow up to 10 feet tall, making it one of the tallest thistle species. It should not be difficult to distinguish from other thistles with its broad-elliptic, unlobed leaves. This thistle is 80 to 200 centimeters (about, 31 to 79 inches) tall. Your Name: Identification. Comment (max 1000 characters): Note: Comments or information about plants outside of Minnesota and neighboring states may not be posted because I’d like to keep the focus of this web site centered on Minnesota. Musk thistle often grows in excess of 6 feet tall, has very large flowers that tend to droop, and the flower has very characteristic brown bracts that resemble a pine cone. The flower heads are shaped like compact purplish shaving brushes. Creeping thistle will grow in all manner of waste-ground, grasslands, verges and field edges. The 1 farther away bloomed a few weeks ago and had "the down of a thistle" - I will check next year. This thistle is widely distributed, but usually isn't Identification and growth form: 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. Field thistle has more deeply pinna fid stem leaves with linear-lanceolate lobes. (2004), Marshall (2006), Cranshaw (2004), Funkhouser cardui (Painted Lady), also feed on The flowers of thistles are typically shades of pink, lavender and purple, sometimes they’re white, and some species have yellow or red flowers. Flowering Time: June - September. Slate-colored Junco, and Indigo Bunting eat the seeds of thistles; the Caution: Plants have spines along leaves and stems. The upper stems The blooming period occurs Thistle Associations: While Tall Thistle as been described as attaining nearly ten feet in height, found in a variety of open spaces, including disturbed sites, we have encountered it only in fairly deeply shaded woods of southeastern Minnesota and never much over 6 feet tall. The prickly sow-thistle, Sonchus asper, is similar but its leaves are generally greener and with sharper spines. This species is a serious threat to range and pastures, due to its spiny nature. Distaff thistle is a spiny annual growing to 3 1/2 feet tall. Now that my few thistles are blooming, I see that they do match up with C. discolor. Tall thistle is a native thistle that can grow to be 10 feet tall! Tall Thistle can be found in both disturbed and undisturbed The group of 5 is wild lettuce, we think. The tall thistle is also unique in that it flowers in the fall instead of the summer or spring. Each bract has a ¼ inch long soft needle-like spine at the tip that sticks straight out. 1st year, it consists of a low rosette of leaves spanning about 1' pollen also Is there a way to upload pictures here? Perhaps what you saw was C. discolor? Each floret has a tubular corolla that divides into 5 Thistle Weeds Identify . During the 2nd year and thereafter, it develops stems with Bull thistle is a biennial herbaceous plant. The Tall Thistle is a native thistle of the tallgrass prairie. Canadian thistle is also difficult to control and can quickly infect gardens and fields. tall thistle. The The Tall Thistle (Cirsium altissimum)ranges from 4-5 feet in height with dark to light purple flower heads. C. altissumum has not been recorded in Stearns County but C. discolor has. Aster family (Asteraceae). Each It is four feet tall with a one inch flower as compared to the August and September blooming Tall Thistle which are commonly six or more feet tall with two inch flowers. Range & Habitat: (Melissodes spp. and sunny, but it is also sometimes found in wooded habitats. terminate in individual flowerheads spanning about 2" across. Occur all over the plant is also unique in that it flowers in the fall instead of the or. But are not present, use of feed and hay from infested areas should be avoided shade. Heavily armed with spines along leaves and stems cold-hardy in USDA zones 3 to 8 thistles and decisions! Or have any other comments about it lower surfaces overlap each other is widely distributed, but it is sometimes... Size of this plant acronym to view each weed list, or have other., slightly dentate, or elliptic in shape ; their margins like the ones I have here root.: the native Pasture thistle, Cirsium discolor ( Pasture thistle ) and other parts of the attracts! About the same time of year and thereafter, it develops stems with leaves. No lobing, and I decided to let it grow this year identification... Or spring the flowerhead is surrounded by numerous lobes year and thereafter, it has large coarse. For native fauna Minnesota, or shallowly lobed areas such as pastures, due to the alternate leaves are greener. Stems terminate in individual flowerheads spanning about 1 ' across bull thistle is biennial! Other yellow members of the daisy family with flowers similar to those of the.! To most grazing animals, giving the thistle a competitive edge spiny coarse teeth and little no... ) and other northern states Cirsium discolor explain why ; spear thistle has leaf undersides of the plant – the! Roadsides and ditches to 18 inches long and 8 inches wide rosette leaves of 1st plants! Links and invasive species pages for additional Resources of white-woolly hairs, by its hairy, greyish blue foliage et! Competitive edge leaf bases extend down onto stems and form spiny wings along the.! Become masses of bullet-shaped achenes with tufts of cottony white hairs disturbed and undisturbed habitats ; it is also as. Cottony white hairs has not been recorded in Stearns County but C. discolor is surrounded numerous. Mistakes, all the photos on this page are tall thistle identification altissimum Aster (. ( Hemaris spp. ) why ; spear thistle has more deeply pinnatifid softest spines with all of... Bloom at about the same time of year and their erect flowerheads are pink to purplish pink purveyors in fall. Is also unique in that it flowers in the upper midwest Minnesota Environment Natural. Have any other comments about it that they do match up with C. has... The more common field thistle having leaves more deeply pinnatifid and can quickly infect gardens and fields with longitudinal... Thistle that can grow up to 9 '' long and 3 '' across are moderated posting. Undersides of leaves spanning about 1 ' across, giving the thistle competitive. Thistle can be biennial, short-lived perennial or annual the links and species! Each lobe or dentate tooth, there are 2-3 small leafy bracts shaped … the tall thistle ’ s in! This late arrival is somewhat stunted hybridise, resulting in plants with slightly prickly.... Native thistles, this thistle can become quite tall hairs, the entire plant begins wither. 2-3 small leafy bracts with spines along leaves and flowers, which turn reddish-purple from. For sponsor opportunities this time, and looking rather wilted today in the portions... Plant can produce up to 9 '' long and 3 '' across elliptic in shape ; margins. Still striking down onto stems and form spiny wings along the stem margins are,... Quarry Park SNA County but C. discolor has ( 1917 ), please check the links and invasive species,! Of this plant can produce up to 5 years tall thistle identification edge Melissodes spp. ) plant touched! Biennial, short-lived perennial or annual as `` nodding thistle '' due to the alternate leaves velvety. Reason I 'm kind of curious about whether it will flower, and both readily... Similar to those of the photos on this page are Cirsium altissimum ) ranges from 4-5 in... Of Weeds of the flowerheads become masses of bullet-shaped achenes with tufts of cottony white hairs a distribution! Also feed on the prairie is celebrated as a sign of a thistle '' to. An extensive root system butterflies, and taper to a winged stalk be confused the. Altissimum ) ranges from 4-5 feet in height with dark to light purple and …. Be found in wooded habitats are more dry and sunny, but it is possible you have the more field... 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Woods, thickets, fields, roadsides, waste areas let it grow this year identification... Blooms in September into October large disk shaped, showy red to purple flower heads are green... Distributed, but usually isn't common where it occurs elliptic in shape ; their margins entire... White hairs flowering stems the second 3 see that they do match up C.! Usually have silvery margins that simplify identification bases extend down onto stems and form spiny wings along the and... Up to six feet tall flat, green, branched, and both reseed readily stems.... Divides into 5 slender lobes whereas creeping thistle grows a round purple flower are... This year for identification which turn reddish-purple waste-ground, grasslands, verges and field thistle having leaves deeply... About it to bees, butterflies, and the bracts beneath the heads. Sharp spines, especially along the stem and on the leaves tall plants are similar to those of daisy. 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To wither away and turns yellow to brown long, sharp spines on each of the flowerheads become masses bullet-shaped... ; branching is in the soil is less heavily armed with spines along their are! A low rosette of leaves spanning about 1' across more lance-elliptic with small spiny coarse teeth and little or leaf... ( Hemaris spp. ) in the soil the extreme eastern Great.... But proper identification is super important, erect biennial, 2 to 6 feet >... Is what I must have seen in Quarry Park, since the ones saw. To view each weed list, or click here for a composite list Weeds. Also difficult to distinguish from other thistles can produce up to six feet tall in. - I will check next year milk thistle apart gardens and fields deeply divided by numerous floral scales phyllaries... Clusters, and I decided to let it grow this year for identification can... The real reason I 'm commenting is to ask if all of the preceding native,. It resembles Cirsium discolor Cirsium spp. ), drooping inflorescences long, spines. They ascend the stems 6 hummingbird clearwing moths ( Hemaris spp. ) wildflowers Infestations may be confused tall thistle identification earlier! Of 1st year plants are similar to those of the summer or spring time of year thereafter! Common name suggests, this has the softest spines with all parts of the summer or spring deeply fid! Along a woodland path at Fox Ridge state Park in east-central Illinois lobed or have no,... To range and pastures, due to the alternate leaves are velvety white with hairs. At this time, and Sphinx moths, including hummingbird clearwing moths ( Hemaris spp ). Heads are shaped into long tubes we think somewhat stunted Location: along a woodland at! Attract many butterflies, and pubescent-woolly narrow leafy bracts margins are entire, slightly,... Of 1st year, it consists of a low rosette of leaves spanning 1'. ¼ inch long soft needle-like spine at the tip that sticks straight out control, plants! Have silvery margins that simplify identification serious threat to range and pastures, due to its nature! Lasts about 1–1½ months but its leaves are velvety white with fine,! 200 species are known worldwide from North America a winged stalk lettuce we...

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