This bush is in Tennessee, USA.: flower bush pic 1 flower bush pic 2 flower bush pic 3: flower bush pic 4:

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    $\begingroup$ @DevashishDas , red horse chestnut is a tree...the Q. refers it as a bush... $\endgroup$ Nov 12, 2014 at 18:54
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    $\begingroup$ Maybe the tree was young so looking like bush. young trees sometimes can flower. $\endgroup$
    – user25568
    Sep 10, 2016 at 16:44
  • $\begingroup$ Not sure about the ID, but those are definitely flowers, not fruits. You can see some of the fallen blossoms on the leaves in one of the photos. $\endgroup$
    – Clem C
    Sep 14, 2018 at 21:08
  • $\begingroup$ Red flowering Japanese knotweed. $\endgroup$ Sep 21, 2018 at 12:15

1 Answer 1


Polygonum cuspidatum, common name Japanese knotweed. A notorious invasive species.

It's actually a herbaceous perennial (those stems grew in just one season, and will die back to the ground at the first hard freeze), not a shrub. The red things are ripening seeds, not flowers.

  • $\begingroup$ Can you please add some reference to support your answer? $\endgroup$
    Jan 10, 2015 at 6:54
  • $\begingroup$ Polygonum cuspidatum? Google shows white flower for them. $\endgroup$
    – user25568
    Sep 10, 2016 at 16:41
  • $\begingroup$ It is quite showy as it booms in cascades of silver flowers in late August that turn an intense magenta and then to scarlet each year right at time of the solstice. --Bitter Orange and Japanese Knotweed $\endgroup$
    – iayork
    Sep 21, 2018 at 13:27

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