ریشه‌چه

thumb|right|250px|Seed of Scouler's willow (Salix scouleriana) In botany, the radicle is the first part of a seedling to emerge from the seed, during the process of germination. Germination understood as a biomechanical process describes the radicle with the hypocotyl combined as the embryonic axis in the seed. The radicle emerges from a seed through the micropyle.