Untitled Document I. General terms A. Root crown - root with a short piece of stem attached. What survives in time of stress. B. Haustoria - the roots of parasitic plants. C Tap root and lateral roots.
Tap root is what radicle becomes in dicots and gymnosperms.
Laterals come from it. In monocots the radicle dies so there is no tap root. Instead there is a jumble of lateral roots. Secreted by root cap and root hairs. This enables the root to move through the soil with ease.