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Lima beans in a seed catalogue, 1894. A lima bean (Phaseolus lunatus), also commonly known as butter bean, [2] sieva bean, [3] double bean [4] [5] or Madagascar bean, is a legume grown for its edible seeds or beans.
The hilum is the white region in the center of the namesake "black eye" of the black-eyed pea. In botany, a hilum (pronounced / ˈ h aɪ l ə m /) is a scar or mark left on a seed coat by the former attachment to the ovary wall or to the funiculus (which in turn attaches to the ovary wall).
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The oldest-known domesticated beans in the Americas were found in Guitarrero Cave, an archaeological site in Peru, and dated to around the second millennium BCE. [40] Genetic analyses of the common bean Phaseolus show that it originated in Mesoamerica, and subsequently spread southward, along with maize and squash, traditional companion crops. [41]
The word 'bean', for the Old World vegetable, existed in Old English, [3] long before the New World genus Phaseolus was known in Europe. With the Columbian exchange of domestic plants between Europe and the Americas, use of the word was extended to pod-borne seeds of Phaseolus, such as the common bean and the runner bean, and the related genus Vigna.
An edible seed [n 1] is a seed that is suitable for human or animal consumption. Of the six major plant parts, [ n 2 ] seeds are the dominant source of human calories and protein . [ 1 ] A wide variety of plant species provide edible seeds; most are angiosperms , while a few are gymnosperms .