Preferred habitat includes roadsides, waste places, fields and clearings. The flowers, which are hermaphrodite (having both male and female reproductive organs) look rather like pinkish-purple (very occasionally white) shaving brushes, with the bracts serving as stubby handles. A hairy perennial with stiff erect ribbed stems, Common Knapweed grows up to a metre in height and its upper part branches freely. such as common knapweed Centaurea nigra, red clover Trifolium pratense, bulbous buttercup Ranunculus bulbosus (three good indicators for separating neutral grasslands from acid, basic and improved swards), T. repens, yellow rattle Rhinanthus minor, common mouse-ear Cerastium fontanum, bird’s-foot trefoil Lotus corniculatus and ribwort plantain (The bracts of these species are very different: green bracts in the case of Greater Knapweed; brown in Common Knapweed.). The upper leaves are usually narrow and entire (without lobes) and untoothed, while the lower leaves are sometimes lobed and have coarse teeth. The inflorescence contains a few flower heads, each a hemisphere of black or brown bristly phyllaries. The species is hermaphrodite (has both male and female organs) and is pollinated by Bees, flies, Lepidoptera (Moths & Butterflies). The bracts are triangular in shape. 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. A local vernacular name is hardheads. Preferred habitat includes roadsides, waste places, fields and clearings. Habitat Affected . fuscata Rouy Centaurea phrygia Lapeyr. Brown knapweed (Centaurea jacea) is different in having pale brown bract appendages, no pappus. Brown knapweed is native to Europe and introduced in North America. Height: 30–80 cm (12–32 in.). Centaurea: nome xenéricu que procede del griegu kentauros, homes-caballos que conocíen les propiedaes de les plantes melecinales. Centaurea debeauxii, a fertile hybrid of C. nigra and C. jacea, is an invasive perennial of pasture and natural grasslands with an increasing non-native distribution in wet temperate areas of continental North America, now also recorded in South America and Australia. Family: Asteraceae. 1753. A local vernacular name is hardheads. There is only one VC55 record from Evington in 2018, but it may be introduced in wildflower mixes. In 14th century Britain this wildflower was known as Matfellon, and it was eaten with pepper at the start of a meal to stimulate the appetite. There is also a widespread fertile hybrid between this species and black knapweed (Centaurea nigra), which can be quite … It was rated in the top 5 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. The chemical composition of the volatile fractions obtained by steam distillation from the capitula and aerial parts of this plant was analyzed by GC-MS [34]. It attracts hoverflies, honey bees and bumblebees, and is also is a favourite of many butterfly species including meadow brown, ringlet and small tortoiseshell, which all feed from its nectar. Very common throughout Most of Britain and Ireland except for the far north of Scotland, where it is an occasional find, Common Knapweed is a European native species that has been introduced to many other parts of the world including North America, where it has in places become a nuisance weed because it so easily invades places where the soil has been disturbed. Scientific Name: Centaurea nigra. Equally well known as Black Knapweed, notably in the English Midlands these thistle-like wildflowers are also referred to as Hardheads, because the buds and flower heads are firm and solid. 1. Greater knapweed - a close relation - is similar but its flowers are more garish and opulent and its leaves are fully lobed. Black knapweed has been collected occasionally in IV. Its foliage is coarse and tough and not generally palatable to livestock. The flower-head is hard and solid, a mass of dark-brown-fringed green bracts overlapping over each like roof tiles. bold Dominant species, influencing the appearance of the habitat Character species Less strictly linked to a specific habitat. Tracheophyta › Magnoliopsida › Asteraceae › Centaurea › Centaurea nigra Ecology A perennial herb of meadows and pastures, sea-cliffs, roadsides, railway banks, scrub, woodland edges, field borders and waste ground, on a wide range of soils. Habitat; Related Links. It is often abundant beside lakes and streams in southern Britain, especially where grazing animals have been fenced off from themargins. In addition, users can learn about the location of vouchered specimens and see images to get a better visual for each plant. 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. Centaurea nigra Lam. Habitat: roadsides, forests - open areas, grassland. Although the plant is often unwanted by landowners because it is considered a weed by many, it provides a great deal of nectar for pollinators. It is considered noxious in some states, where it can form large infestations. Conservation significance of threatened habitats: uncertain which habitats could be impacted in WI V. Native Range and Habitat . However, in order to regenerate, it needs an opportunity to set seed … nigra: epítetu llatín que significa "negru". The lower leaves are stalked, whilst the upper ones are stalkless.
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