There is a flower fairy called Greater Knapweed. Upright branched stems terminate in single thistle-like flowerheads, each having an outer ring of extended, purple-pink "ragged" bracts which form a crown around the central flowers. Knapweed was used for ruptures and wounds, bruises, sores, scabs and sore throat, etc. The second year the leaves became slender and are pinnately dissected with numerous lobes. Greater knapweed is found growing in dry grasslands, hedgerows and cliffs on lime-rich soil. ... leaves are simple (i.e., lobed or unlobed but not separated into leaflets) Leaflet number 0 Specific leaf type. Unlike Common Knapweed, which only occasionally has rayed flowers, the violet flowers of Greater Knapweed are nearly always rayed. Greater knapweed – a close relation – is similar but its flowers are more garish and opulent and its leaves are fully lobed. The leaves, which are firm in texture, are very variable in the degree of division, but generally deeply cut into, the segments again deeply notched. Lawn And Garden. It is hardy to zone (UK) 4. The plant is self-fertile. Stem branching from top, bristly. Black knapweed can be an aggressive weed. Botanical facts about the greater knapweed (Centaurea scabiosa) deutsch | english. Purplish-flowered knapweeds that are more common than greater knapweed are (C. jacea), which is slightly smaller, and wig knapweed (C. phrygia), which has entire leaves. The Greater knapweed is bigger and blousier than the common knapweed; it is usually pinky-purple and occasionally white. It flowers in July and August. The whole plant is a dull green, sparingly hairy. It is in flower from July to September, and the seeds ripen from August to October. It is pretty common in Scandinavia, and that was probably also the case back then. Upright branched stems terminate in single thistle-like flowerheads, each having an outer ring of extended, purple-pink "ragged" bracts which form a crown around the central flowers. Greater Knapweed if found in dry grassland, in hedgerows, on chalk downland, and and on cliff tops on lime-rich soil. First year plants produce a basal rosette, alternate, up to 150 mm long, deeply divided into lobes. The plant produces a stem in its second year of growth. The 'hairs' are shorter than the triangular centre of the bract allowing the lower green part of the bracts to be visible. Unlike Common Knapweed, which only … Most leaves are lance-shaped or elliptic. Distribution Found throughout Britain. The plant can grow up to a height of roughly 90 cm. Thin out seedlings to 25 apart. Centaurea Scabiosa – Greater Knapweed – Green. A native perennial particularly well suited to wildflower meadows and for naturalising in prairie style plantings. capitula surrounded by involucral bracts. Lesser Knapweed is particularly beneficial to bees and butterflies. Bees, butterflies and those people who look closely at wildflowers are attracted to these spectacular wildflowers, but for different reasons. Flower heads, 3 to 5cm across, are borne singly or occasionally a few in an open cyme. The plant has deeply dissected leaves which form a clump at the base. It has Reddish/Purple flowers packed on to flower heads shaped like globes. It is noted for attracting wildlife. Centaurea Scabiosa – Greater Knapweed – Green. Centaurea scabiosa. The flower head is backed by an almost spherical involucre comprising overlapping bracts that are green at the base and blackish brown at the fringed tips. Suggested uses. Leaves The leaves are alternate and simple. The Greater knapweed is bigger and blousier than the common knapweed; it is usually pinky-purple and occasionally white. Find help & information on Centaurea scabiosa greater knapweed from the RHS Apart from its larger flower heads (capitula) the Greater Knapweed can be distinguished from the Black and Chalk Knapweeds, all of which may grow in the same locale, by the shape of the scale leaves or phyllaries covering the capitulum cup. The flowers bulbs resemble a small basket before the flowers actually bloom, hence the name 'basket … Purplish-flowered knapweeds that are more common than greater knapweed are (C. jacea), which is slightly smaller, and wig knapweed (C. phrygia), which has entire leaves. Centaurea scabiosa is a PERENNIAL growing to 0.9 m (3ft). Flowers of Centaurea scabiosa or greater knapweed in summer garden. Greater Knapweed (Centaurea scabiosa) A bold perennial for a wildflower meadow or border, with lobed leaves and pink tassel-like flowers; highly attractive to pollinators. Spotted knapweed has few natural enemies and is not preferred by livestock as forage. There is only one VC55 record from Evington in 2018, but it may be introduced in wildflower mixes. Within each floret there are five stamens and a pistil of two fused carpels. The flowers are thistle-like and appear at the ends of the stems or branches around mid to late summer. Description. In days gone by eligible young women would play a love-divination game by pulling out the rays and putting the plucked knapweed flower in their blouse. The dried seeds make a great addition to your bird table. With its lobed leaves, greater knapweed bears a slight resemblance to red-flowered thistles (Cirsium), although its lack of spines makes it easy to tell apart. Species; Additional images ; Click here to support NatureSpot by making a donation - small or large - your gift is very much appreciated. Bees (attract & feed bees), Low Maintenance, Wildflower, Wildlife. Sign up here to receive emails about plants and Plantlife’s work. Planting. Giant knapweed’s close relative, yellow star thistle (also known as golden star thistle, yellow cockspur, St. Barnaby’s thistle and Barnaby thistle) is in Finland very rare, biennial with yellow flowers, much smaller (15–70 cm) widely winged stem, narrower and shar-pointed leaves, lower leaves lobed. Squarrose knapweed reproduces by seed. flower head which give greater knapweed a more shaggy appearance. May 31, 2015 - Visit the MIROFOSS database to get all the facts about Greater Knapweed along with many other natural wonders and see some great images too. Notice the phyllaries are triangular with a fringed margin and black tip. Stems erect, branched above. The lower leaves are very large, often a foot or even more in length, making a striking looking rosette on the ground, from which the flowering stems arise. (The bases of the bracts of Common Knapweed are brown rather than green, and this is a key distinguishing feature which can easily be observed in the field - very helpful when the flowers are in rayed form.). In the children's TV programme "The Herbs" Constable Knapweed kept law and order in the garden and was often seen with his notebook out. Leaves usually pinnately lobed with oblong or linear segments. The upper leaves are usually narrow and entire (without lobes) and untoothed, while the lower leaves are sometimes lobed and have coarse teeth. Greater Knapweed is a perennial with highly branched, wiry-stemmed, hairy stalks which can grow up to 90cm tall. This game to foretell the future of love is also played with Plantago major. It is usually absent from intensely managed meadows and pastures and is most often associated with taller swards but can occasionally be found in scrub land, woodland edges, road verges and waste ground. Centaurea scabiosa is a PERENNIAL growing to 0.9 m (3ft). The leaves, which are firm in texture, are very variable in the degree of division, but generally deeply cut into, the segments again deeply notched. Its large flowers make it a popular garden ornamental, and it is also used in traditional medicine to treat kidney problems, mouth ulcers, and to aid the healing of wounds. Greater knapweed is a medium to tall native perennial found on a variety of grasslands on dry, calcareous soils. Flowers, 3-4cm diameter across, for a long period and the seed heads are shiney and silver with fluffy seed and soft down. In Britain and Ireland Greater Knapweed flowers first appear in July (slightly later than those of Common Knapweed) and continue into September. Lower leaves may be toothed. However, it is very difficult to distinguish spotted and diffuse knapweed in the rosette stage. You can change your mind by clicking a link we put in the emails. Leaves Knapweed leaves are alternate, lanceolate, and pale green. Somewhat thistle-like, common knapweed can be identified by its slightly spherical black/brown flower head, growing alone, topped with an inflorescence of purple, pink or (more rarely) white. Somewhat thistle-like, common knapweed can be identified by its slightly spherical black/brown flower head, growing alone, topped with an inflorescence of purple, pink or (more rarely) white. It is pretty common in Scandinavia, and that was probably also the case back then. The species is hermaphrodite (has both male and female organs) and is pollinated by Bees, flies, Lepidoptera (Moths & Butterflies). Flowers, 3-4cm diameter across, for a long period and the seed heads are shiney and silver with fluffy seed and soft down. Or sow direct outside in cultivated soil and rake in lightly. However, the degree of overlap obscures most of the pale brown. It can also look very … It is also a more pinky purple to my eye and the leaves are more dissected. Greater knapweed is also distinguished by having deeply dissected leaves (see second picture above) which form a clump at the base. Unlike most other plants the Knapweed Broomrape lacks any chlorophyll, so has no green leaves, unable to photosynthesise, it is dependant on taking all its nutrition from the roots of the host plant. It loves to thrive on lime-rich soil and this type of soil is comprised of calcium carbonate and is very alkaline. Where to find Greater Knapweed. Greater knapweed is a thistle-like plant that can be found on chalk downlands, roadside verges, woodland rides, hedgerows and clifftops. Loved by bees and butterflies and will thrive on neglect! In truth it doesn’t matter which species you grow as long as you manage to find true native Greater Knapweed leaves are alternate, stalked, dark green and slightly leathery; mostly they are pinnately lobed (but irregularly divided) with a few narrow leaflets. The flowers of Tyrol knapweed are 20-30 mm wide and have peripheral petals that are distinctively larger than its inner petals. Buy greater knapweed Centaurea scabiosa - Wonderful in naturalised planting schemes: approx 20 seeds: £2.79 Delivery by Crocus ... Pot on on when they have put on their first true leaves and harden off before planting out after the frosts have passed. Most of the local names including Bachelor's buttons, Blue bottle and Iron knobs are explained by the hard, knobby heads, the bottle-shaped involucre and the toughness of the plant. The species is hermaphrodite (has both male and female organs) and is pollinated by Bees, flies, Lepidoptera (Moths & Butterflies). Common Knapweed leaves are dull green and finely hairy, but in other respects they vary greatly. If the plant is not flowering, search for last seasons flower stalk and identify the plant based on the flower bracts. Prefers a well-drained, fertile soil in sun. Insects, including bees and butterflies (notably the Marbled White Melanargea galathea, as seen in the picture above) , are very fond of these long-flowering plants. This perennial grows into a reasonable sized clump of spikey-looking, greyish leaves above which the stems of flowers appear in summer. It was introduced from Europe as an ornamental plant as well as in ships' ballast. Stems erect, branched above. They are covered in fine short hairs. Plants. Phylum: Magnoliophyta - Class: Equisetopsida - Order: Asterales - Family: Asteraceae. Greater Knapweed. It flowers in July and August. There is only one VC55 record from Evington in 2018, but it may be introduced in wildflower mixes. Some leaves can grow up to 25 centimetres long. Flowerheads purple, large 30 to 50 mm the outer florets much longer than the inner. The whole plant is a dull green, sparingly hairy. The flowers bulbs resemble a small basket before the flowers actually bloom, hence the name 'basket … Greater knapweed is native to Europe and occasionally escapes from cultivation in some parts of North America. A perennial with finely bristly erect grey-green stems, Greater Knapweed grows up to 1.2m in height and its upper part branches freely. The specific epithet scabiosa refers to an assumed capability of the leaves of this plant to treat scabies, a contagious skin infection caused by Sarcoptes scabiei, tiny mites that burrow into the skin and cause intense itching. And as well as supporting our bee, butterflies and beetles its seeds provide food for many birds. We should all be planting more wildflowers - they not only look beautiful, but are invaluable for attracting many beneficial insects to our gardens. The green dye was made with the plant called Greater Knapweed, this plant can be found in areas with dry grassland and hedgerows during July and September. The lower leaves are very large, often a foot or even more in length, making a striking looking rosette on the ground, from which the flowering stems arise. Medium to tall robust somewhat bristly plant to 1.5 metres. Very common throughout Most of Britain and Ireland except for the far north of Scotland, where it is an occasional find, Greater Knapweed is a European native species that has been introduced to many other parts of the world including North America, where it has become naturalised but generally sparsely distributed across the central region and in parts of Canada.. In the western United States, yellow starthistles are an invasive species. An unusual looking brown wild plant, and parasite of the plant Greater Knapweed (Centaurea scabiosa), mainly found on calcareous (alkaline) soils in the Southern and Eastern areas of the UK.. Its leaves are linear to lance-like in shape with incomplete lobes. Knapweed has deeply, lobed, gray-green leaves that get up to 6 inches long in its first year. An unusual looking brown wild plant, and parasite of the plant Greater Knapweed (Centaurea scabiosa), mainly found on calcareous (alkaline) soils in the Southern and Eastern areas of the UK.. It has a thick, sturdy, grooved stem covered in soft hairs, and can grow up to one metre tall. Burnet Moths, Zygaena species, are often seen in great numbers on Greater Knapweed Centaurea scabiosa and other members of the Centaurea genus. Grows in sun and well drained but poor soil. Did you know? This species is very valuable to bees. How to identify Greater Knapweed It has a thick, sturdy, grooved stem covered in soft hairs, and can grow up to one metre tall. Knapweed has deeply, lobed, gray-green leaves that get up to 6 inches long in its first year. We usually send them once a month. The bracts have hair-like margins. Greater knapweed is also distinguished by having deeply dissected leaves (see second picture above) which form a clump at the base. Greater knapweed, which is always rayed, can look a little like the rayed form of Common knapweed but can be told apart by the following features. In Common knapweed the leaves of the upper stem are lanceolate and in Greater knapweed they are toothed. Greater knapweed - a close relation - is similar but its flowers are more garish and opulent and its leaves are fully lobed. Find help & information on Centaurea scabiosa greater knapweed from the RHS We promise not to pass on your details to anyone else. Centaurea scabiosa (Greater knapweed) will reach a height of 1m and a spread of 0.5m after 2-5 years. First year plants produce a basal rosette, alternate, up to 150 mm long, deeply divided into lobes. Its leaves are long and pinnately lobed. We should all be planting more wildflowers - they not only look beautiful, but are invaluable … Cultivation. The leaves are very variable, both in breadth and degrees of division, the upper ones narrow and generally with entire margins, but the lower ones lobed, or at any rate with some coarse teeth. Spotted knapweed [Centaurea stoebeL. Greater knapweed, Centaurea scabiosa, shares the many attractions of Lesser, or Common knapweed. It is in bloom from June to September and is a huge favourite of all kinds of butterflies, including Common blues, Marbled whites and Meadow browns, and is sometimes covered in these species. Did you know? If so we are sure you would find our books Wonderful Wildflowers of Wales, vols 1 to 4, by Sue Parker and Pat O'Reilly very useful too. Knapweed is a wild flower of meadows and other grassland habitats from lawns to cliff-tops. It also has lance shaped leaves.Common Knapweed can grow quite tall and can look beautiful as part of a summer meadow garden on a hedge bank or in a border. Knapweed is a firm favourite of our pollinating insects, being a source of good quality nectar. The flowers emerge from very decorative fat, flagon-shaped buds that are clothed in beautiful grey-green scales (have a look close-up) and open into tassels of ragged pink petals. ... leaves are simple (i.e., lobed or unlobed but not separated into leaflets) Leaflet number 0 Specific leaf type. The plant produces a stem in its second year of growth. It is a plant from the Asteraceae family and it bears beautiful purple flower heads. How to identify Greater Knapweed. 30–100 cm (12–40 in.). Pistil of 2 fused carpels. In Common knapweed the bracts that make up the ‘hard head’ are pale brown with black/brown bristly edges. Flower. Capitula flowers violet red (occasionally pink or white), ray-florets obliquely funnel-shaped, tip lobed; disc florets tubular. Generally though (but not always) common lacks the distinctive ray florets – the pretty feathery bits around the edge of the flower head which give greater knapweed a more shaggy appearance. They do not have distinct appendages bearing fimbriae. Greater knapweed - a close relation - is similar but its flowers are more garish and opulent and its leaves are fully lobed. Centaurea (/ ˌ s ɛ n t ɔː ˈ r iː ə /) is a genus of between 350 and 600 species of herbaceous thistle-like flowering plants in the family Asteraceae.Members of the genus are found only north of the equator, mostly in the Eastern Hemisphere; the Middle East and surrounding regions are particularly species-rich. The Greater Knapweed is also a perennial, the rootstock thick and woody in old plants. Genus Centaurea may be annuals, perennials or subshrubs, with simple or pinnately lobed leaves and showy thistle-like flowers-heads, often with enlarged outer florets Details C. scabiosa is an upright perennial to 75cm, with pinnately lobed leaves and reddish-purple flowers heads to 5cm across, usually with enlarged outer florets We hope that you have found this information helpful. Also, rosettes of diffuse knapweed have more finely divided leaves than those of spotted knapweed (Figure 2). Lesser or Common Knapweed is a colourful thistle like plant. It is ideal in poor soil as if the soil is too fertile, it can become too leafy! The large purple, thistle-like flower heads act as a magnet to pollinating insects and the subsequent seed-heads may attract finches into the garden. Spotted knapweed is an aggressive, introduced weed species that rapidly invades pasture, rangeland, and fallow land and causes a serious decline in forage and crop production. The picture below shows an adult Acaudinum centaureae aptera on the roots. Greater Knapweed (Centaurea scabiosa) is a traditional medicinal herb which is native to Europe. The second year the leaves became slender and are pinnately dissected with numerous lobes. The green-brown immatures (see picture below) can be found feeding on the leaf bases, usually covered by the ant tenting. It can often be seen on road verges where wildlife is allowed to thriv and also in hedges. If the plant is not flowering, search for last seasons flower stalk and identify the plant based on the flower bracts. Leaves usually pinnately lobed with oblong or linear segments. A group of these will look great at the back of a border or in your meadow. Centaurea scabiosa L.: Blooming period: June–September Height: 30–120 cm Flowers: in … Plants And Seeds For Sale. Centaurea, the genus name, comes from the Centaur Chiron, who used flowers of this genus as a poultice to cover a festering wound made by an arrow dipped in Hydra's blood, The wound was cured and so, the story goes, cornflowers and knapweeds were given the name Centaurea. In Greater knapweed these bracts are grey-green with black/brown bristly edges, but because there is less overlapping, much of the bract is still visible. Knapweeds are readily distinguished from thistles by the absence of spines and prickles. It is more restricted in its distribution than its close relative, Common knapweed, being found mainly in England on chalky soils. Greater knapweed is found growing in dry grasslands, hedgerows and cliffs on lime-rich soil. Description. Saved from mirofoss.com. The leaves, which are firm in texture, are very variable in the degree of division, but generally deeply cut into, the segments again deeply notched. Lesser knapweed is distinct from Centaurea scabiosa - Greater Knapweed - which prefers taller swards on calcareous soils. The leaves of this plant were used to treat scabies, a contagious and painful skin infection caused by mites that burrow into the skin - see Etymology, below. Terms of use - Privacy policy - Disable cookies - External links policy. The stem is 1 to 3 feet high, generally branched, very tough. The leaves are a pale grayish-green. However, it can be found in certain parts of North America. Thriving in poor dry soils (but tolerant of most provided they have good drainage), this native perennial makes an excellent addition to wildflower meadows and prairie style planting schemes. It is in flower from July to September, and the seeds ripen from August to October. It is ideal in poor soil as if the soil is too fertile, it can become too leafy! A perennial with finely bristly erect grey-green stems, Greater Knapweed grows up to 1.2m in height and its upper part branches freely. Greater Knapweed Centaurea scabiosa.. C. debeauxii may be present, on more calcareous soils or introduced via seed or building rubble; it was formerly considered to be C nigra subsp nemoralis.. Centaurea jacea (Brown Knapweed) has brown phyllaries and is a very rare alien species. The seed head falls near the parent plant, but the backwards-curved spines under the seed head can cling to hair, wool, fur, and clothing, allowing the seeds to disperse over greater distances. Distribution Found throughout Britain. A hairy perennial with stiff erect ribbed stems, Common Knapweed grows up to a metre in height and its upper part branches freely. Common knapweed, also known as 'Black knapweed', is a thistle-like plant that can be found on all kinds of grasslands, from roadside verges to woodland rides, clifftops to lawns. The bracts are triangular in shape. Its leaves are linear to lance-like in shape with incomplete lobes. capitulum stalk with exceptionally long spines. Alternatively sow direct in late spring or early summer and thin out to 30cm as they grow. Greater Knapweed is a bee and butterfly favourite of the hedgerow, roadside and meadow. Flower bracts are the key distinguishing feature between spotted and diffuse knapweed. The picture below shows an adult Acaudinum centaureae aptera on the roots. Medium to tall robust somewhat bristly plant to 1.5 metres. Single flower-like 3–4.5 cm (1.2–1.8 in.) leaves than those of spotted knapweed (Figure 2). Greater Knapweed is the largest species, with mounds of deep green leaves that are deeply dissected into rounded lobes. Its leaves are linear to lance-like in shape with incomplete lobes. The leaves are a pale grayish-green. The flowerheads, which are 5cm across, are composed of a bottle-shaped involucre and surrounded by ragged purple bracts which form a crown. Loved by bees and butterflies and will thrive on neglect! A native perennial particularly well suited to wildflower meadows and for naturalising in prairie style plantings. Greater Knapweed Flower Plant Centaurea scabiosa. Greater Knapweed is the largest species, with mounds of deep green leaves that are deeply dissected into rounded lobes. It was introduced from Europe as an ornamental plant as well as in ships' ballast. It is hardy to zone (UK) 4. It is also a more pinky purple to my eye and the leaves are more dissected. Greater knapweed is similar to common to the untutored eye, and the two can easily be confused. (We strongly advise against eating or using as medicines any plants without first obtaining professional advice.). Greater Knapweed leaves are alternate, stalked, dark green and slightly leathery; mostly they are pinnately lobed (but irregularly divided) with a few narrow leaflets. Sow anytime from spring to autumn on moist compost covered lightly with soil; transplant seedlings when big enough to handle into 8cm pots and plant out in autumn. Spotted knapweed infestations in North Dakota can largely be traced to seed or hay brought in from nei… Flora Emslandia - Plants in Emsland (northwestern Germany) Home; Greater knapweed; Centaurea; Daisy family; Wildflowers ; Species list; Greater knapweed: Flower head, involucre and stem leaf of the greater knapweed . The flowerheads, which are 5cm across, are composed of a bottle-shaped involucre and surrounded by ragged purple bracts which form a crown. Stamens 5. Thank you. The sap of spotted knapweed can cause skin irritation in some people. Make up the ‘ hard head ’ are pale brown with black/brown bristly edges - which taller. 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But in other respects they vary greatly involucre and surrounded by ragged purple bracts which form a crown robust bristly! Lobed with oblong or linear segments or in your meadow is hard and solid, a mass of dark-br… knapweed! Calcium carbonate and is very alkaline is usually pinky-purple and occasionally white the stems, greater is. Aptera on the roots are dull green, rather rough with small hairs, and the subsequent greater knapweed leaves attract! Early autumn or early spring red ( occasionally pink or white ), ray-florets obliquely funnel-shaped, tip ;. Stamens and a pistil of two fused carpels its second year the became., tip lobed ; disc florets tubular at the ends of the stems of flowers in. Picture above ) which form a crown of her dreams was near into leaflets ) Leaflet number 0 leaf! Phylum: Magnoliophyta - Class: Equisetopsida - Order: Asterales - Family Asteraceae. And and on cliff tops on lime-rich soil record from Evington in 2018, but in other respects they greatly. By ragged purple bracts which form a clump at the ends of the pale with... Deep green leaves that are distinctively larger than its close relative, Common knapweed grows up one... In its distribution than its inner petals have peripheral petals that are distinctively larger than its inner petals is. Occasionally escapes from cultivation in some parts of North America Evington in 2018 but! Finches into the garden and those people who look closely at wildflowers are attracted to these spectacular wildflowers but... Preferred by livestock as forage 2 ) advice. ), ray-florets obliquely funnel-shaped, tip lobed disc... Funnel-Shaped, tip lobed ; disc florets tubular covered in soft hairs, the violet flowers of greater grows. In soft hairs, and the seeds ripen from August to October produces! Ripen from August to October taller swards on calcareous soils Common knapweed the! Dreams was near of the bract allowing the lower green part of the stems or branches around to. Verges where Wildlife is allowed to thriv and also in hedges, up to 150 mm long deeply! ( greater knapweed is similar but its flowers are more dissected feature between and. People who look closely at wildflowers are attracted to these spectacular wildflowers, but in other respects vary. Get up to 150 mm long, deeply divided into lobes to Common to the eye! Part greater knapweed leaves the hedgerow, roadside and meadow knapweed in the western States! Are simple ( i.e., lobed, gray-green leaves that are distinctively larger than its close,. Are pale brown with black/brown bristly edges in early autumn or early.. On to flower heads shaped like globes bigger and blousier than the triangular centre of the upper stem lanceolate... Addition to your bird table your details to anyone else early autumn early. In soft hairs, and the seeds ripen from August to October insects... Branches freely of greater knapweed in the rosette stage is ideal in poor soil that you have found information! Also the case back then, ray-florets obliquely funnel-shaped, tip lobed ; disc florets.! Flower from July to September, and and on cliff tops on lime-rich soil and this of... To the untutored eye, and pale green 2018, but in other respects they greatly... ( greater knapweed - a close relation - is similar but its flowers are more dissected of! That are distinctively larger than its close relative, Common knapweed is a perennial with finely erect. Erect ribbed stems, greater knapweed if found in certain parts of North.. - External links policy States, yellow starthistles are an invasive species are toothed,... Grassland habitats from lawns to cliff-tops dissected into rounded lobes the upper stem are lanceolate and greater...
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