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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;
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.
An ancient Akkadian name originating before the 5th century (400 CE). [47] 麻 (Má) Má, a Chinese name for hemp, predates written history and has been used to describe medical marijuana since at least 2700 BCE. It is the earliest recorded name. [48] [49] Hemp is recorded in the Book of Documents. [5] [26] Ma-kaña Bantu. [50] Maconha ...
Although the chemical formula for THC (C 21 H 30 O 2) describes multiple isomers, [10] the term THC usually refers to the delta-9-THC isomer with chemical name (−)-trans-Δ 9-tetrahydrocannabinol. It is a colorless oil.
Latin, or scientific name for the plant species Cannabis sativa, known for tall, sparsely branched stalks with long, narrow leaves. [See cannabis.] cannabis slang Cannabis has more than 1,200 slang names, including weed, a commonly used cannabis slang name. Additionally, there are many slang terms for consumption of cannabis, and describing the ...
Cannabis americana Pharm. ex Wehmer; Cannabis chinensis Delile; Cannabis erratica Siev.; Cannabis foetens Gilib.; Cannabis generalis E.H.L.Krause; Cannabis gigantea ...
Weeds may also act as a "living mulch", providing ground cover that reduces moisture loss and prevents erosion. Weeds may also improve soil fertility; dandelions, for example, bring up nutrients like calcium and nitrogen from deep in the soil with their tap root, and clover hosts nitrogen-fixing bacteria in its roots, fertilizing the soil directly.
Cannabis (/ ˈ k æ n ə b ɪ s /), [2] commonly known as marijuana (/ ˌ m æ r ə ˈ w ɑː n ə /), [3] weed, and pot, among other names, is a non-chemically uniform psychoactive drug from the Cannabis plant.