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[[File:PolygonumPersicara-plant-sm.jpg|thumb|right|''Persicaria maculosa'', ''Spotted lady's thumb'']]
'''Persicaria maculosa''' is an annual plant in the buckwheat family, Polygonaceae. It is widespread across Eurasia from Iceland south to Portugal and east to Japan. It is also present as an introduced and invasive species in North America, where it was first noted in the Great Lakes region in 1843 and has now spread through most of the continent.
==Uses==
{{Uses|Stomach pains}}, {{Uses|Gravel pains}}, {{Uses|Rheumatism}}, {{Uses|Poison ivy rash}}, {{Uses|coldsColds}}, {{Uses|coughsCoughs}}, {{Uses|Pimples}}, {{Uses|Diarrhea}}, {{Uses|Sore throats}}
==Parts Used==
==Chemical Composition==
It contains Phenolics, peptides, terpenoids, and sterols<ref name="chemical composition"/>
==Common names==
==Identification==
===Leaf===
{{Leaf|Simple|alternateAlternate|Narrowly lance-shaped, about 6x longer than wide, with pointed tips}}<ref name="Leaf"/>
===Flower===
{{Flower|Unisexual|1/8 inch long|roseRose-pink|4 to 8|The flowers are 5-parted, with a perianth that may be greenish-white at the base to rose at the tip}}
===Fruit===
{{Fruit|General|7–10 mm|Each flower is replaced by a seed that is ovoid|slightly Slightly 3-angled, black, and shiny|manyMany}}
===Other features===
==Commonly seen growing in areas==
{{Commonly seen|Damp shady places}}, {{Commonly seen|cultivated Cultivated land}}, {{Commonly seen|Borders of forests and fields}}.
==Photo Gallery==
<references>
<ref name="chemical composition">[https://www.ncbi.nlm.nih.gov/pubmed/26916522 "chemical Chemical constituents"]</ref>
<ref name="Leaf">[http://www.friendsofthewildflowergarden.org/pages/plants/smartweed_ladysthumb.html "plant Plant decsription"]</ref>
<ref name="How to plant/cultivate">["Cultivation details"]</ref>
</references>
