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First let us know the difference between shrub and herb:

  1. Herbs are shorter than shrubs.
  2. Herbs don't have multiple stems while shrubs have multiple branches.
  3. There are about 3 groups of herbs while there are four groups of shrubs.
  4. Herbs can be grown beneath the shrubs whereas shrubs cannot be grown in such a way.
  5. Herbs are called as rootstock whereas herbs are referred to as woody plant.

Accordingly, The common sunflower is an annual herb with a rough hairy stem 1-4.5 metres high, broad, coarsely toothed, rough leaves 7.5-30 cm long, and heads of flowers 7.5-15 cm wide in wild specimens and often 30 cm or more in cultivated types.

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11y ago

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