Morphology
Wild forms are typically fine-stemmed, freely-branching and small-leaved, with a twining habit, photoperiod sensitivity and indeterminate growth (Lawn, 1995). Flowering is asynchronous, and there is a tendency to hard seeds. In many areas, landraces which retain many of these characteristics persist, in particular with regard to daylight sensitivity, growth habit and hard seeds. Seed colour is variable, but commonly red or yellow. The red type is commonly named 赤小豆 in Chinese, literally meaning 'red small bean'. It's considered an herb in Traditional Chinese Medicine.
Read more about this topic: Vigna Umbellata
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