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2,4-DB or 4-(2,4-dichlorophenoxy)butyric acid is a selective systemic phenoxy herbicide used to control many annual and perennial broad-leaf weeds in alfalfa, peanuts, soybeans, and other crops. Its active metabolite , 2,4-D , inhibits growth at the tips of stems and roots.
Section Falcatulae is divided into subsections Leves, which refers to smooth seeds and Tuberculatae which means tuberculate seeds and Trigonella suavissima is placed in the former group. [3] The species is under the Anguinae series within the Leves subsection because of the plicated linear legumes. [4] Falcatulae is a paraphyletic section. [4]
Trifolium repens, the white clover, is a herbaceous perennial plant in the bean family Fabaceae (otherwise known as Leguminosae). It is native to Europe, including the British Isles, [2] and central Asia and is one of the most widely cultivated types of clover.
Marsilea quadrifolia is a herbaceous plant found naturally in central and southern Europe, Caucasia, western Siberia, Afghanistan, south-west India, China, Japan, and Vietnam, though it is considered a weed in some parts of the United States, where it has been well established in the northeast for over 100 years. [2]
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Trifolium subterraneum, the subterranean clover [2] (often shortened to sub clover), subterranean trefoil, is a species of clover native to Europe, Southwest Asia, Northwest Africa and Macaronesia. The plant's name comes from its underground seed development ( geocarpy ), a characteristic not possessed by other clovers.