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Weed identification may relate to History of plant systematics, the classification of plants; Botany, the study of plants; Taxonomy, the classification of living things;
Department of Pathology, Physiology and Weed Service. "Common Groundsel: Senecio vulgaris". Virginia Tech Weed Identification Guide. Virginia Tech College of Agriculture and Life Sciences Department of Pathology, Physiology and Weed Service. Archived from the original on 2008-05-09
Persicaria cespitosa (synonym Polygonum cespitosum), [1] known as tufted knotweed, is a summer annual weedy plant of the family Polygonaceae, native to eastern Asia, from China to Japan and Southeast Asia, and introduced into North America.
The BBCH-scale (weed) identifies the phenological development stages of weed species. It is a plant species specific version of the BBCH-scale. D = Dicotyledons G = Gramineae M = Monocotyledons P = Perennial plants V = Development from vegetative parts or propagated organs
Horseweed is commonly considered a weed, and in Ohio, Oregon, and some other locations, [11] it has been declared a noxious weed. [12] [13] It was the first weed to have developed glyphosate resistance, reported in 2001 from Delaware. [14] It can be found in fields, meadows, and gardens throughout its native range.
Sida acuta, the common wireweed, [3] is a species of flowering plant in the mallow family, Malvaceae.It is believed to have originated in Central America, but today has a pantropical distribution and is considered a weed in some areas.
Cannabis also has a long history of being used for medicinal purposes, and as a recreational drug known by several slang terms, such as marijuana, pot or weed. Various cannabis strains have been bred, often selectively to produce high or low levels of tetrahydrocannabinol (THC), a cannabinoid and the plant's principal psychoactive constituent.
Impatiens capensis, the orange jewelweed, common jewelweed, spotted jewelweed, jewelweed, [3] spotted touch-me-not, or orange balsam, [4] is an annual plant in the family Balsaminaceae that is native to North America. [5]