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Japanese Knotweed
Reynoutria
japonica
Houttuyn
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Japanese Knotweed: https://marylandbiodiversity.com/species/3543
Synonyms
Fallopia japonica
Pleuropterus zuccarinii
Polygonum cuspidatum
Tags
Non-native
Invasive
Kingdom Plantae
Division Tracheophyta
Class Magnoliopsida
Order Caryophyllales
Family Polygonaceae
Genus Reynoutria
View Taxonomy
Kingdom Plantae
Division Tracheophyta
Class Magnoliopsida
Order Caryophyllales
Family Polygonaceae
Genus Reynoutria
Seasonality
About Taxon
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Seasonality
Seasonality
History
Time of the year
Entire Year (Jan - Dec)
Spring (Mar - May)
Summer (Jun - Jul)
Fall (Aug - Nov)
Winter (Dec - Feb)
Range of years
1915
1916
1942
1945
1954
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1957
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1993
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2012
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1999
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1993
1986
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1957
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1942
1916
1915
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Flowers
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Total
Records
by Month
for Jan - Dec from 2019 - 2020
Source: Maryland Biodiversity Project database
Total
Records
by Year
Source: Maryland Biodiversity Project database