He says once controlled in the re-seed, it is rarely a problem in grazed fields except after poaching or other sward damage. It is one of many genera with the common name being thistles. The inflorescence is 2.5–5 cm diameter, pink-purple, with all the florets of similar form (no division into disc and ray florets). Rights Royalty Free Rights Managed. Its leaves are grey-green and spiny, and its tall stems are winged, spiny and cottony. [17] Seed is also often spread by human activity such as hay bales. Where to find it It has long green leaves (to 35mm) with many small prickles on their upper surface. Click here for instructions on how to enable JavaScript in your browser. It flowers between July and September, producing sweet smelling purple flowers on top of a spiky stalk, the flowers being very attractive to bumble bees. Spear thistles have flower heads that are bristle like and are coloured pink to purple, and the plant has green, sharp spiny leaves. In order to post comments, please make sure JavaScript and Cookies are enabled, and reload the page. [2][3][4][5][6] It is also naturalised in North America, Africa, and Australia and is an invasive weed in some areas. 2:241 (1798); C. lanceolatus L., Sp. PAY ATTENTION TO THE RISK INDICATIONS AND FOLLOW THE SAFETY PRECAUTIONS ON THE LABEL. It was rated in the top 10 for most nectar production (nectar per unit cover per year) in a UK plants survey conducted by the AgriLand project which is supported by the UK Insect Pollinators Initiative. Spear thistles grow to be 1 to 1.5 metres (3.3 to 5 feet) in height, with flower stems at the end of the branches, and look similar to the well known Scotch thistle or cotton thistle, although they are a different species of plant and have the scientific name Onopordum acanthium. Some species in particular are cultivated in gardens and wildflower plantings for their aesthetic value and/or to support pollinators such as butterflies. The feature that really distinguishes Spear Thistle is its showy purple flowers surrounded by greenish spine tipped bracts. Spear thistles have the scientific name Cirsium vulgare and they are from the family Asteraceae, the family of asters, sunflowers and daisies. It grows in waste places, by roadsides, in pastures and cultivated ground, and is generally distributed over the whole kingdom. It also represents one of the highest honours the country can give an individual. 2:241 (1798); C. lanceolatus L., Sp. Conservatoire et Jardin botaniques & South African National Biodiversity Institute, African Plant Database, "Which flowers are the best source of nectar? The monarch butterfly and other larger-sized butterflies can feed easily from the flowers due to their large size. It is best cleared from land by hoeing and deep cutting of the taproot before seeds mature; regular cultivation also prevents its establishment. [citation needed], Species of flowering plant in the daisy family Asteraceae. Spear thistle. Towns and … The Spear Thistle has flower heads with bright pink florets (tiny flowers) and a ball of spiny bracts (leaf-like structures) that appear from July to October. Image number. The leaves are stoutly spined, grey-green, deeply lobed; the basal leaves up to 15–25 cm long, with smaller leaves on the upper part of the flower stem; the leaf lobes are spear-shaped (from which the English name derives). Spear thistles are classified as a noxious and an environmental weed in some countries, and is a particular problem in Australia, parts of the United States and the United Kingdom. Your email address will not be published. It grows in waste places, by roadsides, in pastures and cultivated ground, and … Other genera known as thistles include Carduus, Cynara, Onopordon, and Silybum. Long green leaves ( to 35mm ) with many small prickles on their surface. Increase its proliferation, & Turner, R. 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