Subshrub

A subshrub (Latin suffrutex) is a woody perennial plant. Gardeners use the word to distinguish plants from a shrub that have lower height, typically less than 10–20 cm tall, or that are only weakly woody and/or persist only for a few years. Small, low shrubs such as lavender, periwinkle, and thyme, and many members of the family Ericaceae, such as cranberries, are often classed as subshrubs.

This short article about biology can be made longer. You can help Wikipedia by adding to it.