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This is a parasitic noxious weed, Striga gesnerioides, commonly called Witchweed. This is a terrestrial noxious weed, Drymaria arenarioides commonly called Lightning weed. It is sometimes confused with daisies. Some noxious weeds are harmful or poisonous to humans, domesticated grazing animals, and wildlife. Open fields and grazing pastures ...
Oryza rufipogon is an invasive species and listed as a 'noxious weed' by the United States, [19] and listed as a noxious weed in Alabama, California, Florida, Massachusetts, Minnesota, North Carolina, Oregon, South Carolina, and Vermont.
Kickxia spuria is a species of flowering plant in the family Plantaginaceae known by several common names, including roundleaf cancerwort [1] and round-leaved fluellen. [2] It is native to Europe and Asia, but it is present on other continents as an introduced species, and sometimes a noxious weed.
It is native to Europe, but it is known on most continents as an introduced species and often a noxious weed. It is a hardy bunchgrass which grows in many types of urban, cultivated, and disturbed habitat. It is a weed of many types of agricultural crops, growing in vineyards and fields. Herbicide-resistant strains have been noted. [4]
It has been introduced into the United States, where it is often regarded as a noxious weed. Its common names are longstamen rice [3] and red rice. [4] The host resistance gene, Xa21, from O. longistaminata, has been integrated into the genome of O. sativa as it confers broad resistance to rice blight disease caused by Xanthomonas oryzae pv ...
Centaurea calcitrapa is a species of flowering plant known by several common names, including common star thistle, red star-thistle [2] and purple star thistle.It is native to Europe but is known across the globe as an introduced species and often a noxious weed.
Also according to the U.S. federal government Rumex is classified as a noxious weed. [1] Rumex maritimus frequently grow in areas that flood with water. Shoots that are elongated are grown during mid summer or summer, while shoots that are not elongated reproduce during its flooding season because the water transports its seeds. [6]
It is declared noxious weed in Puerto Rico and is naturalised in northern Australia, including Queensland where it is listed as a Class 2 declared pest plant. [2] [4] It grows to 2.5–4 m (8.2–13.1 ft) high. The three lobed leaves are purple and sticky when young and become bright green with age.