Taxon  Report   6764 
Polygonum persicaria  L.  (not an active name)
Lady's thumb,  Spotted ladysthumb
Polygonum persicaria
© 2004 Carol W. Witham
More photos from
CalPhotos / Calflora
Polygonum persicaria, a dicot, is an annual herb that is not native to California; it was introduced from elsewhere and naturalized in the wild.

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Plant Characteristics
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Bloom Period
Polygonum persicaria
© 2007 Neal Kramer
Genus: Polygonum
weed, characteristic of disturbed places, wetland-riparian
Habitat: disturbed
Distribution by County 

Add an Observation of  Polygonum persicaria

Name Status:
Accepted by PLANTS + JM93
ICPN accepted name: Persicaria maculosa
Alternate Names:
(according to)

PLANTS: Persicaria maculata
PLANTS: Polygonum persicaria var. ruderale
PLANTS: Polygonum persicaria var. angustifolium
PLANTS: Polygonum minus
PLANTS: Polygonum minus var. subcontinuum
PLANTS: Polygonum fusiforme
PLANTS: Polygonum dubium
PLANTS: Persicaria vulgaris
PLANTS: Persicaria ruderalis
PLANTS: Persicaria ruderalis var. vulgaris
PLANTS: Persicaria puritanorum
PLANTS: Persicaria persicaria
PLANTS: Persicaria maculosa
PLANTS: Polygonum puritanorum
NOTE: Polygonum persicaria is not an active name in the Calflora species table.
More information about  Polygonum persicaria
Nursery / seed vendor availability from CNPLX
Commercial availability unknown.
Photos on CalPhotos / Google Images
UC Integrated Pest Management Weed Photo Gallery
(profile of this plant as an agricultural weed)

Records from the Consortium of California Herbaria

ITIS Original Publication citation


Search the International Plants Names Index

Search (Flora of North America)

website references from Google

Suggested Citation
Calflora: Information on California plants for education, research and conservation,
with data contributed by public and private institutions and individuals, including the Consortium of California Herbaria.
[web application]. 2018. Berkeley, California: The Calflora Database [a non-profit organization].
Available:   (Accessed: May 24, 2018).

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