<Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (April 2018) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (April 2018) (Learn how and when to remove this template message) </Td> </Tr> <P> A shrub or bush is a small - to medium - sized woody plant . Unlike herbs, shrubs have persistent woody stems above the ground . They are distinguished from trees by their multiple stems and shorter height, and are usually under 6 m (20 ft) tall . Plants of many species may grow either into shrubs or trees, depending on their growing conditions . Small, low shrubs, generally less than 2 m (6.6 ft) tall, such as lavender, periwinkle and most small garden varieties of rose, are often termed "subshrubs". </P> <P> An area of cultivated shrubs in a park or a garden is known as a shrubbery . When clipped as topiary, suitable species or varieties of shrubs develop dense foliage and many small leafy branches growing close together . Many shrubs respond well to renewal pruning, in which hard cutting back to a "stool" results in long new stems known as "canes". Other shrubs respond better to selective pruning to reveal their structure and character . </P>

A woody plant of medium height with many stems
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