It branches occasionally to frequently, becoming broader toward the flowering stems. micranthos, Centaurea biebersteinii, Centaurea maculosa, Centaurea stoebe ssp. The plant was introduced into North America in the late 1800s as a contaminant of alfalfa or clover seed. Leaves: Gray-green, covered in rough hairs, and deeply divided. micranthos) Description: Spotted knapweed is a biennial or perennial in the Asteraceae (sunflower) family. Plants generally live 2-7 years but can live up to 9 years or longer. Leaves. Spotted knapweed is able to outcompete other plants by … Note: Spotted knapweed is now properly known as Centaurea biebersteinii DC., though most of the literature and invasive species listings use C. maculosa Lam.. This plant probably arrived in the 1890's as a stow-away in alfalfa or hay seed brought over from Europe and Asia. The spotted knapweed is a biennial or short-lived perennial herbaceous plant. Spotted knapweed. Spotted knapweed (Centaurea stoebe)Author: George Beck, Colorado State University Cooperative Extension Adapted from the Colorado State University Extension Natural Resources Fact Sheet " Diffuse and Spotted Knapweed" Identification and Life Cycle. Spotted knapweed is a native of Europe and Asia. Centaurea stoebe, the spotted knapweed or panicled knapweed, is a species of Centaurea native to eastern Europe. Centaurea stoebe is its current scientific name, though the other two names continue to appear. Arrival Date. Spotted knapweed is an herbaceous biennial, although it may live for up to nine years. Synonyms: Centaurea maculosa; Centaurea biebersteinii, Centaurea stoebe ssp. Spotted knapweed may also have been introduced through soil used as ship ballast. Native to Europe and Asia, spotted knapweed was accidentally introduced to North America in the late 1800s. Two cytotypes of the plant exist which have been named as either different species or subspecies. Asteraceae. Appearance. With grayish leaves and pink to purple thistle-like flowers, this plant grows to be 2 to 3 feet in height. Biology. Common name(s): Diffuse knapweed Scientific name: Centaurea diffusa Family: Sunflower or Aster family (Asteraceae) Reasons for concern: This plant is a prolific seed producer. C.A. Spotted Knapweed Centaurea stoebe L.. collect. Individuals can grow to 0.66 m. Common Name: Spotted knapweed Scientific Name: Centaurea stoebe Origin: Eastern Europe. Spotted knapweed (Centaurea stoebe) is a plant belonging to the sunflower (Asteraceae) family. (Asteraceae) [7, 28, 42, 47, 58, 59, 173, 181]. It has not been known to be a Centaurea maculosa. (1803) and Acroptilon picris (Pallas ex Willd.) Spotted knapweed is now a serious problem in the rangelands of the northwest Great Plains in the United States. Spotted Knapweed is native to central Europe and east to central Russia. This species reproduces entirely by seed. It was first recorded in North America in 1893 and in Minnesota in 1918, likely introduced as a contaminant of alfalfa seed. COMMON NAMES diffuse knapweed tumble knapweed white knapweed . 1). 4). : Common Name: spotted knapweed: Status: Not declared noxious in Victoria: Habitat: In the United States it occurs on well-drained, light-textured soils in areas of summer rainfall, in forest habitat as well as open grasslands and meadow. P.S. It is also an invasive species in the United States, and particularly widespread in dryer regions of the Pacific Northwest. It has become a serious problem of pastures and rangeland in the western United States. Description: Plants to three feet tall from a stout taproot. It was accidentally introduced into North America from Western, Central and Eastern overview; data; media; articles; maps; names Centaurea stoebe ssp. Spotted knapweed exposure can irritate the skin. It was introduced into North America as a contaminant in alfalfa (Medicago sativa) in Victoria, British Columbia in 1883 (Sheley and Petroff 1999). A fertile hybrid between diffuse knapweed and spotted knapweed C( . Scientific name: Centaurea maculosa Lam. Insects Released in the United States for Biological Control of Spotted Knapweed Scientific Name Insect Type Plant Part Attacked Where Collected Date of First U.S. Release State/Date of Release in Eastern U.S. and Canada Known Estab. spreading knapweed . Flower heads Spotted Knapweed is a photoautotroph. Scientific Name: Centaurea maculosa Lam. Spotted & Diffuse Knapweed Species Centaurea biebersteinii & Centaurea diffusa. micranthos) is a grassland perennial plant native to Eurasia. Other names for this plant include: Common names: tumble knapweed, spreading knapweed, white knapweed; Scientific names: Acosta diffusa; Ecological threat: Invades open grasslands, prairies, open forests, orchards and disturbed areas such as ditches, cultivated fields and field edges. Centaurea stoebe ssp. A winter-hardy, short-lived perennial with deep taproots (Fig. Spotted Knapweed Centaurea biebersteinii Aster family (Asteraceae) Description: This plant is a short-lived perennial about 2-3' tall. Spotted Knapweed Centaurea stoebe Common name: Spotted Knapweed Scientific name: Centaurea stoebe Family: Asteraceae Description Knapweeds resemble thistles but lack spiny leaves and stems. As the name suggests, the larvae produced burrow into the root where they metamorphose into adult form. Common Name: Spotted knapweed Scientific Name: Centaurea maculosa Origin: Europe and Asia. The plant is a perennial, living an average of three to five years and frequently up to nine years (Boggs and Story, 1987). micranthos (Gugler) Hay/synonym C. biebersteinii L., formerly C. maculosa Lam. Foliage. Centaurea stoebe (Spotted Knapweed) is a species of biennial herb in the family Asteraceae. Has a stout, deep taproot (a large, descending, tapering root). Flowering stems are 1-4 … Plants grow 6 to 24 inches (15 to 60 cm) in height and spread entirely by seeds. Scientific name: Centaurea stoebe L. ssp. Spotted knapweed (Centaurea stoebe ssp. It can quickly take over both disturbed and managed areas, outcompeting native species and … Spotted Knapweed. Spotted knapweed (Centaurea stoebe) is a short-lived, non-creeping perennial in the sunflower family (Asteraceae). This was the name designated by de Candolle in 1838. stoebe and ssp. Large plants can produce over 20,000 seeds. It has a self-supporting growth form. Prohibited Noxious, Class 1 in the Canadian Weed Seeds Order, 2016 under the Seeds Act.All imported and domestic seed must be … It has simple, broad leaves. Common Name: Spotted knapweed Scientific Name: Centaurea biebersteinii DC. Its common name has always been spotted knapweed. It can be found in disturbed open sites, grasslands, overgrazed rangelands, roadsides and logged areas. Synonyms listed by Ochsmann (2003) are Centaurea picris Pallas ex Willd. Synonyms. Based on phylogenetic analyses of the subtribe Centaureinae, the name was revised to Rhaponticum repens (L.) Hidalgo (Hidalgo et al., 2006). Common name(s): Spotted knapweed Scientific name: Centaurea stoebe Family: Sunflower or Aster family (Asteraceae) Reasons for concern: This plant is a prolific seed producer. It was introduced to North America in the 1890s as a contaminant in agricultural seed and through soil discarded from ship ballast. Classification: Phylum or Division: Magnoliophyta Class: Magnoliopsida Order: Asterales Family: Asteraceae Identification: Biennial or short-lived perennial with a stout taproot. A basal rosette of deeply lobed leaves is produced the first year.

spotted knapweed scientific name

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spotted knapweed scientific name 2020