Sucker

A vigorous shoot which grows from a root system (sometimes another shoot) either below or at ground level. Suckers can be from the rootstock of a grafted plant, rather than the desired part of the plant. Sucker growth should be removed, so it doesn't draw energy from the plant. On woody plants, new stems can emerge from the roots. These can occur next to existing stems or many feet distant, depending on the species and how far the roots spread.