Home
Checklist
Sites
Explore
Maryland Quad Map
Maryland Quad Heat Map
Top 100 Contributors by Species
Top 100 Contributors by Records
Recent Discoveries (this month)
MBP Data Processing Stats
Recently Added Photos List
More
About
MBP Brochure
MBP Blog
Dedication
Editors
Community
Partners
Resources
Bibliography
iNaturalist Integration Summary
Maryland Plant Atlas
MD/DCRC Resources
eBird
Connect With MBP
Facebook
Instagram
Twitter (X)
Bluesky
LinkedIn
MBP iNaturalist Project
Flickr MBP Group
MBP Google Group
Help
About Records
FAQ
MBP iNaturalist FAQs
How to Contribute
Contact
Donate
Japanese Knotweed
Reynoutria japonica
Houttuyn
Share This Page
Japanese Knotweed - Reynoutria japonica Houttuyn: https://www.marylandbiodiversity.com/view/3543
Synonyms
Fallopia japonica
Pleuropterus zuccarinii
Polygonum cuspidatum
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
About Taxon
Media
Map
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
1956
1957
1980
1981
1982
1984
1986
1993
1998
1999
2003
2004
2005
2007
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
2012
2011
2010
2007
2005
2004
2003
1999
1998
1993
1986
1984
1982
1981
1980
1957
1956
1954
1945
1942
1916
1915
Filter by Tag
- - -
Flowering
Fruiting
Flower Budding
No Evidence of Flowering
Update
Reset
Total
Records
by Month
for Jan - Dec from 2019 - 2020
Source: Maryland Biodiversity Project database
View Bibliography
Total
Records
by Year
Source: Maryland Biodiversity Project database
View Bibliography