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Word of the Week: Hilum

Hilum: The scar on a seed that marks the point at which it was attached to the plant.*

Bean seeds have very obvious hilums.

From left to right in the picture: Mexican Red bean, Mung bean, Cranberry Red bean, Amish Nuttle bean, Rattlesnake bean, Hutterite Soup bean, and Black Valentine bean.

*Allaby, M. (2006). A dictionary of plant sciences (Revised ed.). Oxford: Oxford University Press.

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