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Persicaria maculosa Gray
Polygonum persicaria L.

7 photos.
A weed known as "lady's thumb", "spotted smartweed", "spotted knotweed", etc.
due to a dark spot on the leaf. 

ITIS Taxonomic Serial No. 823821








1.  June 22, 2009.  Plants in early bud
stage.  Most of the leaves have a dark spot.

2.  June 22, 2009.  Close view of dark-spotted

3.  June 22, 2009.  Budding plants.  Most
of the leaves are unspotted.

4.  July 22, 2009.  Budding plants.  One leaf
(lower center) has a faint dark spot.

5.  July 22, 2009. Leaves, two of which have
faint dark spots

6.  July 22, 2009.   Several budding inflorescences.

7.  September 8, 1999  While in bud in
in June, the plant often does not bloom
until September.