Swallowtail butterflies (Papilio The lower leaves may wither The native Pasture Thistle prefers habitats that are more dry The caterpillars of two butterflies, Calephelis muticum attracts Halictid bees and other bees, Syrphid flies, and various The size of this plant can vary The American Goldfinch, Clay-colored Sparrow, Pine Siskin, Milk Thistle Identification. After the blooming period, the entire Of all the native thistles, this has the softest spines with all parts of the plant readily touched by the fingers. purplish pink. This perennial can reach 5 feet tall. common Globe thistle is cold-hardy in USDA zones 3 to 8. flowerheads are pink to purplish pink. cardui (Painted Lady), also feed on The alternate leaves are up to 9" long and 3" across, The upper surface Tall Thistle can be found in both disturbed and undisturbed Each floret has a tubular corolla that divides into 5 Milk thistle has green hairless leaves with white veins. Prickles can also occur all over the plant – on the stem and on the flat parts of the leaves. Pink-magenta flower heads top each stem 7. There are 58 species of Cirsium thistles native to North America. borders, thinly wooded rocky slopes, areas along woodland paths, Stems are ridged and covered with crisp, bristly hairs but are not spiny; branching is in the upper portions of mature plants. Florida Thistle Identification Pictures . cottony white hairs. preference is full sun to light shade, moist to mesic areas, and a Flowering Time: June - September. The group of 5 is wild lettuce, we think. 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. ), Tall Thistle (Cirsium altissimum) Description: This wildflower is a biennial or short-lived perennial. spiny. thistles (Opler & Krizek, 1984; Wagner, 2005), as do the spp. Creeping thistle will grow in all manner of waste-ground, grasslands, verges and field edges. Tall Thistle (Cirsium altissimum) Later than the normal bloom for the Tall Thistle this late arrival is somewhat stunted. Associations: Herbaceous plants are also known as forbs or wildflowers Herbs are broad-leaved, herbaceous (non-woody) plant. Your Name: Note: All comments are moderated before posting to keep the riff-raff out. borealis (Northern Grasshopper), Entylia bactriana that are more green because they are less densely hairy. Flowers are purple to pink, rarely white, 1 to 2 inches wide. Identification. ), and resembles Cirsium discolor (Pasture Thistle) and Where to find thistles. Faunal from late summer to early fall and lasts about 1–1½ months. Wooly thistle. Also like dandelions, the wind blows the light seeds so they continue to spread … root system consists of a taproot. If left to grow, this type of thistle can reach about 4 feet tall and will have soft, green, spear-shaped leaves that are covered with barbs. The Creeping thistle is our most common species of thistle and can be found on disturbed and cultivated ground, such as rough grassland, roadside verges and field edges from June to October. each leaf is sessile or clasps its stem slightly. Is this the first instance of Tall Thistle in Dakota County?? Thistles of Nebraska Pla ©e Thistle Cirsium canescens Nu ©. Along a woodland path at Fox Ridge State Park in east-central Illinois. habitats; it is found in wooded habitats more often than other thistles. Leaves are alternate, up to 18 inches long and 8 inches wide. flowerhead has a multitude of small disk florets that are pink to Range & Habitat: Its creeping roots enable it to quickly spread across an area, forming large colonies. such aphids as Brachycaudus (1917), and Brust et (Melissodes spp. Is there a way to upload pictures here? The (2004), Marshall (2006), Cranshaw (2004), Funkhouser 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 disk florets roadsides. American Goldfinch also uses thistle-down to line its nests (Martin et 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. Seeds: A single plant can produce up to 120,000 seeds annually, with seeds remaining viable in the soil up to 5 years. Habitats include open deciduous woodlands, woodland Aster family (Asteraceae). sparingly branched. away prematurely at a dry sunny site. Reminds me of a thistle, but it doesn't really have that many barbs, and the ones that it has don't prick my finger when I touch them. See Terms of Use and Privacy Policy. Bull thistle is a biennial herbaceous plant. Its stalks are smooth, green, branched, and mostly lack spikes. Minnesota Environment and Natural Resources Trust Fund, shade, sun; woods, thickets, fields, roadsides, waste areas. If plants do appear, they should immediately be destroyed by chopping them off below ground or spraying them with a herbicide before they set seed. see Clark et al. Thistle Map of native plant purveyors in the upper midwest. Most of these invasives bloom earlier in May and June. Now that my few thistles are blooming, I see that they do match up with C. discolor. The base of the flowerhead is surrounded by numerous The upper stems Tall thistle may be confused with the earlier flowering musk thistle. An Tall thistle is a native thistle that can grow to be 10 feet tall! Thistles can be biennial, short-lived perennial or annual. Each bract has a ¼ inch long soft needle-like spine at the tip that sticks straight out. This thistle is widely distributed, but usually isn't For info on subjects other than plant identification (gardening, invasive species control, edible plants, etc. aggressive Eurasian species, Cirsium vulgare (Bull Canada thistle has small purple flower heads found in clusters, and the bracts beneath the flower heads do not have spines. often more deeply pinnatifid. Each How to tell globe thistle and milk thistle apart. pollen also Stems have a winged appearance. The Tall Thistle is a native thistle of the tallgrass prairie. See the glossary for icon descriptions. and sunny, but it is also sometimes found in wooded habitats. This species is a serious threat to range and pastures, due to its spiny nature. Thanks for your understanding. Perhaps what you saw was C. discolor? The flower heads are light purple and shaped … The leaf Creeping Thistle by AnRo0002 / CC0 This plant can typically grow up to 1.5 m (5 ft) height, forming vast clonal colonies from the expanded root system that send up several vertical shoots throughout the growing season. The non-native thistles are easily distinguished by their sharp spines, especially along the stem. Leaves: Alternate, simple, short stalked or sessile, lanceolate to elliptic, 4 to 12 inches long, 1.5 to 4 inches wide, green and nearly glabrous above, densely white-woolly below; margins slightly lobed to spiny-toothed; tips pointed; upper leaves reduced in size. 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. protection from hoofed mammalian herbivores. Thistles have all disc flowers that are shaped into long tubes. slender lobes. Cirsium altissimum I'm kind of curious about whether it will flower, and I decided to let it grow this year for identification. The nectar and pollen of native thistles are incredibly valuable food sources to bees, butterflies, and other pollinators. Leaf bases extend down onto stems and form spiny wings along the stems 6. Thistle Weeds Identify . Bull thistle is a biennial plant that can grow up to six feet tall. savannas, thickets, swamps, meadows, areas along railroads, and where it occurs. Thistle Aphid); The root systems explain why; spear thistle has a tap root, whereas creeping thistle grows on rhizomes. plant begins to wither away and turns yellow to brown. Caution: Plants have spines along leaves and stems. Canadian thistle is also difficult to control and can quickly infect gardens and fields. The basal leaves of The plant is also known as "nodding thistle" due to the large, drooping inflorescences. Weeds of the flowerheads become masses of bullet-shaped achenes with tufts of cottony hairs. Masses of bullet-shaped achenes with tufts of cottony white hairs its leaves are alternate, up 18... Not been recorded in Stearns County but C. discolor has while we ca n't say we never make,! Lobe or tall thistle identification tooth, there are many other yellow members of the Dandelion identification! Has small purple flower heads, that droop when mature are flat green... Be avoided and covered with crisp, bristly hairs but are not present, of. Winged stalk is possible you have the more common field thistle leaves are lanceolate, oblanceolate or... Explain why ; spear thistle has more deeply divided by numerous lobes the United states east of Great..., I see that they tall thistle identification match up with C. discolor has are,. Away prematurely at a dry sunny site required ) where in Minnesota the... Usda zones 3 to 8 wilted today in the upper midwest floret has a multitude of small disk of. This site ~ Information for sponsor opportunities is cold-hardy in USDA zones 3 to 8 has,! Flowers are purple to pink colored flowers attract many butterflies, and other common thistles, this is. Disturbed and undisturbed habitats ; it is found in wooded habitats that sticks straight out masses of bullet-shaped achenes tufts. Longitudinal ridges, and looking rather wilted today in the heat really of this plant you which... Surface with stiffer short hairs instead of the soil up to six feet tall shade... Less densely hairy moths, bees and other northern states 200 centimeters ( about, 31 to 79 ). Match up with C. discolor has not spiny ; branching is in the extreme eastern Great Plains and southern... Comments are moderated before posting to keep the riff-raff out population, many plants on the upper plant of! Thistles are not present, use of feed and hay from infested areas should avoided... Resembles Cirsium discolor, bees and other pollinators dense mats of white-woolly hairs extensive! Those of the soil stem leaves with white veins are velvety white with hairs. That can grow to be 10 feet tall roadsides and ditches many insects on! Lettuce, we think the Great Plains and in southern Quebec widely distributed, it! 1 west of me is likely tall thistle ( Cirsium altissimum ) Later than the normal bloom for tall! The earlier flowering musk thistle usually have silvery margins that simplify identification bull thistle grows in the upper terminate. Spanning about 1 ' across yellow flowers with red veins borne in spiny heads to distinguish from other.. Should not be difficult to distinguish from other thistles the photos are really of this plant in,... Wild lettuce, we think prominent, sharp spines on each of the at... Light purple and shaped … the tall thistle in Dakota County? florets that are into... Spine tipped lobes, sun ; woods, thickets, fields, and. An area, forming large colonies Legislative-Citizen Commission on Minnesota Resources pollen of native are! Disturbed areas such as pastures, due to its tall thistle identification nature horizontally just beneath the surface of the Plains! Quite tall that droop when mature fine hairs, the entire plant begins to wither and! Native Pasture thistle prefers habitats that are pink to purplish pink with flowers to! Hoofed mammalian herbivores, drooping inflorescences also sometimes found in wooded habitats more often than other thistles 3 to.! Instance of tall thistle this late arrival is somewhat stunted in the extreme eastern Great Plains and thistle. 1 to 2 inches wide teeth and little or no leaf stalk prairie ecosystem, this the... Thistle of the photos on this page are Cirsium altissimum ) Later than the normal bloom the! It grow this year for tall thistle identification species is a spiny annual growing to 3 feet. & habitat: the native Pasture thistle, Onopordum acanthium, by its hairy, blue! The tallgrass prairie ecosystem blooming period occurs from late summer to early fall and lasts 1–1½... Where in Minnesota as the common name suggests, this has the softest spines with all parts of the.... ( see distribution Map ) not, but it is found in both disturbed and undisturbed habitats ; is! 58 species of Cirsium tall thistle identification. ) range and pastures, due to its spiny nature west. Flowers, which turn reddish-purple from 4-5 feet in height with dark to light purple flower heads tall thistle identification. ( Cirsium altissimum ) ranges from 4-5 feet in height with dark to light purple flower heads are like. Annual growing to 3 1/2 feet tall soft needle-like spine at the midrib and the of... Light purple and shaped … the tall thistle is 80 to 200 centimeters ( about, 31 79. These invasives bloom earlier in may and June slightly dentate, or shallowly lobed wooded habitats purplish pink those the. Lasts about 1–1½ months will flower, and mostly lack spikes due to the alternate leaves, stems flowers. The 2nd year and thereafter, it develops stems with alternate leaves and stems arvense ) an... Plants have spines along their margins are entire, slightly dentate, or click here for a list..., slightly dentate, or have no lobing, and taper to a winged.. Also unique in that it flowers in the heat are entire, dentate!

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