You can distinguish the bull thistle by its prickly stem. Copyright Leaf Group Ltd. // Leaf Group Lifestyle. Learn which plants thrive in your Hardiness Zone with our new interactive map! The foliage of the pasture thistle is long and hairy with shallow, spiny lobes that are green in color. Russian thistles can grow from 1 to 3 feet tall and up to 5 feet across. Thistles are characteristically seen in pastures and along roadsides with their sharp prickly foliage that run the length of the plant. Where it become invasive it can often be controlled by repeated mowing before the plant forms blossoms or seeds. Thistles bear spiny leaves and distinctive upright flowers. According to ZipCodeZoo.com, there are about 200 species of thistle found worldwide--in North America, Asia, Europe and northern Africa. Milk thistle is cultivated in Europe and Asia. She has a degree in economics from Sam Houston State University. The seeds are roasted and eaten or used to make a tea or tincture to treat diseases of the liver, gallbladder and kidney. All Rights Reserved. Swamp thistle is a perennial wildflower that grows in wet woods and swamps. They are covered with a mat of woolly hairs, especially on the lower surface of the leaves Russian thistle (Salsola tragus), when dried, forms the tumbleweeds seen along roadsides in some parts of the American West. They can be majestic and elegant, and their showy purple or pink flower heads are unquestionably attractive. The herbicide glyphosate is one effective control, though it may have to be applied more than once to kill the plant. Prickles can also occur all over the plant – on the stem and on the flat parts of the leaves. She holds a Bachelor of Arts in psychology and writing from University of Maryland and is a graduate student in humanities at American Public University. It’s rose and purple colored blooms are clustered and attached to hollow stems with sticky bracts. The foliage on bull thistle is spiny with deeply lobed leaves that are pale green in color. Copyright Leaf Group Ltd. // Leaf Group Lifestyle. Thistles thrive in harsh, dry conditions, but not all thistles are considered beneficial. Russian thistles also aren't really thistles. Like other true thistles, it's a biennial, blooming in its second year. Cotton thistle (Onopordum acanthium) Biennial thistle with a taproot, growing up to 1.5 m tall with large, erect, red-purple single flower heads, which can be solitary or in clusters; Leaves are similar to Scotch thistle, but larger and a blue-grey colour. Bright purple thistle blossoms attract butterflies and bumblebees to the garden in spring and summer and provide a favorite food of birds in summer and fall. The Canada thistle, on the other hand, has a smooth stem. Yellow thistle is a perennial wildflower that grows between 2 and 5 feet tall. The plant is also sometimes eaten as a vegetable. Canadian thistle (Circium arvense) is an invasive weed that spreads rapidly and can infest pastures and gardens. 1. Barber's love for design and writing inspired her to create Design Your Revolution, a blog that shares creative and affordable ways to decorate indoor and outdoor living environments. Walls-Thumma writes about education, gardening and sustainable living. Bracts around the flower heads are long and tapered 6. Their blossoms don't resemble thistles at all, but they do have deeply lobed, spiky foliage typical of thistles. Pasture thistle, a type of thistle, is a perennial wildflower that grows 1 to 3 feet in height. You can find many species of thistle in North America. Thistles thrive in harsh, dry conditions, but not all thistles are considered beneficial. Bright purple thistle blossoms attract butterflies and bumblebees to the garden in spring and summer and provide a favorite food of birds in summer and fall. Above: Misty globe thistles (Echinops ritro) by Isidre Blanc via Wikimedia.The gentler cousin to the Scottish thistle, non-invasive globe thistles (Echinops ritro) are ideal for the garden.With deep blue or violet orbs perched on silvery stems that are from 2 to 4 feet tall, globe thistles provide a striking architectural and textural element to the garden. The foliage on the swamp thistle is long with deeply cut leaves that are prickly and green in color. Stems are fuzzy and mostly unbranched (branched/clustered and more fuzzy near the top) 3. Its fragrant flowers are white to light magenta in color and grow 2 to 3 inches wide. The foliage on the yellow thistle ranges from 2 to 5 inches with bristly leaves that come to a sharp point. Thistles bear spiny leaves and distinctive upright flowers. Thistles vary in terms of climate preference and grow in moist, wet soils as well as dry, arid climates. Yellow thistle prefers sandy soils and grows in fields, salt marshes, roadsides and savannahs. When young, the foliage has a woolly texture. Her articles have appeared on Travels.com and GardenGuides.com. The flower emerges in summer and lasts through the fall. Some thistles are invasive weeds that can crowd out native plants. The foliage on the swamp thistle is long with deeply cut leaves that are prickly and green in color. Flower heads are red- purple and have small white stalks (the “styles”) extending out individual flower tubes less than 1 mm 5. Canadian thistle (Circium arvense) is an invasive weed that spreads rapidly and can infest pastures and gardens. What Are the Different Types of Thistles?. Its fragrant flowers are white to light magenta in color and grow 2 to 3 inches wide. These wildflowers are often seen growing in pastures and along roadsides. Thistles are characteristically seen in pastures and along roadsides with their sharp prickly foliage that run the length of the plant. Though not a member of the thistle (Circium) family, milk thistle resembles other thistles in many ways. The roots of Canadian thistle are very deep, so mowing or cutting it isn't an effective way to control it. Thistle is the common name of a group of flowering plants characterised by leaves with sharp prickles on the margins, mostly in the family Asteraceae. Find the perfect Thistle stock photos and editorial news pictures from Getty Images. Annual, biennial or short-lived perennial 2. Thistle was once a revered plant and flower. North American thistles likely belonged to a single species before the Pleistocene epoch about two million years ago. By creating an account you agree to the Hunker, California Department of Food and Agriculture: Cirsium Genus. Where it become invasive it can often be controlled by repeated mowing before the plant forms blossoms or seeds. Plan the perfect garden with our interactive tool →, North Carolina State University Extension: Pasture Thistle, North Carolina State University Extension: Swamp Thistle, North Carolina State University Extension: Yellow Thistle. Hunker may earn compensation through affiliate links in this story. With its vivid purple flowers and prickly leaves, each type of thistle shares similar characteristics but also has unique identifiers. Flower heads are “cobwebby” 4. The 3-inch blooms are yellow with spiny bracts that are white or purple in color. Yellow thistle begins to flower in late spring and lasts through the fall. Select from premium Thistle of the highest quality. Pasture Thistle. All Rights Reserved. Some thistles are invasive weeds that can crowd out native plants.

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