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中国の東北部が原産で、わが国へは２千年ほど前に渡来した「あずき（小豆）」の一品種です。蔓性が強く、種子が黒いのが特徴です。ふつうの「あずき」は北海道から東北地方が主な産地ですが、「くろあずき」は北海道から沖縄にかけて、わずかに栽培されています。
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マメ科ササゲ属の一年草で、学名は Vigna angularis。英名は Black azuki bean。
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The black azuki bean (Vigna angularis) belongs to Fabaceae (the Pea family). It is an annual herb that is a variety of "Azuki bean" that originated in the northeastern part of China and came to Japan about 2,000 years ago. It is characterized by strong vines and black seeds. It is a variety of "Azuki (red beans)" that originated in the northeastern part of China and came to Japan about 2,000 years ago. It is characterized by strong vines and black seeds. Normal "Azuki bean" is mainly produced in the Tohoku region from Hokkaido, but "Black azuki bean" is slightly cultivated from Hokkaido to Okinawa.
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長野県南箕輪村「信州大学農学部」にて、2005年08月29日撮影。
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くろあずき (黒小豆)
shu@botanic.jp