Rust fungus is a disease that is common for most of the Mentha plants such as peppermint and spearmint. Mildew attacks usually only occur on the west coast of United States where the weather can be foggy and humid, a condition that attracts mildew. piperascens) and its yield are the rust fungus and the mildew attacks. Two main diseases that can significantly damage Japanese mint ( M. Menthol is widely used in dental care, as a mouthwash potentially inhibiting streptococci and lactobacilli bacteria. Mint extracts and menthol-related chemicals are used in food, drinks, cough medicines, creams and cigarettes. Ĭhemical substances that can be extracted from wild mint include menthol, menthone, isomenthone, neomenthol, limonene, methyl acetate, piperitone, beta-caryophyllene, alpha-pinene, beta-pinene, tannins and flavonoids. The leaves have been made into tea to treat colds or aid digestion. Bailey (in reference to eastern Asian plants). glabrata Fernald (in reference to North American plants) and M. arvensis by some authors as two varieties, M. The related species Mentha canadensis is also included in M. Each flower is 3 to 4 mm ( 1⁄ 8 to 5⁄ 32 in) long and has a five-lobed hairy calyx, a four-lobed corolla with the uppermost lobe larger than the others and four stamens. The flowers are pale purple (occasionally white or pink), in whorls on the stem at the bases of the leaves. The leaves are in opposite pairs, simple, 2–6.5 cm ( 3⁄ 4– 2 + 1⁄ 2 in) long and 1–2 cm ( 1⁄ 2– 3⁄ 4 in) broad, hairy, and with a coarsely serrated margin. It has a creeping rootstock from which grow erect or semi-sprawling squarish stems. Wild mint is a herbaceous perennial plant generally growing to 10–60 cm (4–24 in) and rarely up to 100 cm (40 in) tall. It grows in moist places, especially along streams. Bailey (eastern Asian plants such as Japanese mint). glabrata Fernald (North American plants such as American Wild Mint) and M. Mentha canadensis, the related species, is also included in Mentha arvensis by some authors as two varieties, M. It has a circumboreal distribution, being native to the temperate regions of Europe and western and central Asia, east to the Himalaya and eastern Siberia, and North America. Mentha arvensis, the corn mint, field mint, or wild mint, is a species of flowering plant in the mint family Lamiaceae. Mentha paludosa Nees ex Bluff & Fingerh.Mentha kitaibeliana Heinr.Braun ex Haring.Mentha intermedia Nees ex Bluff & Fingerh.Mentha hillebrandtii Ortmann ex Malinv.Mentha argutissima Borbás & Heinr.Braun.
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