🪴Dahlias are perennial plants with
tuberous roots,
though they are grown as annuals in some regions with cold winters.
While some have herbaceous stems, others have stems which lignify in the
absence of secondary tissue and resprout following winter dormancy,
allowing further seasons of growth.[7] As a member of the Asteraceae,
the dahlia has a flower head that is actually a composite (hence the
older name Compositae) with both central disc florets and surrounding
ray florets. Each floret is a flower in its own right, but is often
incorrectly described as a petal, particularly by horticulturists. The
modern name Asteraceae refers to the appearance of a star with
surrounding rays.
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