Invasive SpeciesJapanese knotweed

Fallopia japonica
FOUND by littleriver27
ID Confirmed
Quality checked by LS
Peer reviewed by LS
Field Notes
When going to collect data in the forest I was happy to find that there was Japanese Knotweed in the place I pinpointed, and in a place I was easily able to access it to collected clear data, and images. Well observing I noticed that there were vines wrapping themselves around the Japanese Knotweed. A question I have about that is: How is the vine impacting the Japanese Knotweed? Something I was surprised about was how many flowers the Japanese Knotweed were reproducing. I was surprised by this because from the other samples I took the other Japanese Knotweed clusters didn't have any flowers they had all died off. A problem I did run into was that there were bees flying all around my quadrat making it hard to get really close to the quadrat for closer observations.
Supporting Evidence
Photo of my evidence.
Using the vital signs website I know it was Japanese Knotweed because of all the white flowers all over it. These flowers are what the Japanese Knotweed reproduce.
Photo of my evidence.
Another reason I know that I found Japanese Knotweed is when I used the ID cards I found out that the Knotweed tends to be in bigger clusters, and can reach up to a height of 3 meters. From the data, and images I collected I can clearly see that the Japanese Knotweed is clustered, and is in the height range of 3 meters.
Photo of my evidence.
My last point of evidence using the vital signs ID cards is how the Japanese Knotweed has an alternate leaf arrangement. This meaning that they are opposite of each other, and are alternating. From vital signs I know this is true, and I made the connection of what the alternating leaf arrangement looks like, and that how I know I found Japanese Knotweed.
Species Observation: Species Looked For
Did you find it?: 
I think I found it
Scientific name:
Fallopia japonica
Common name:
Japanese knotweed
Count of individuals: 
Flower (plants)
Sampling method: 
Quadrat (randomized- placement)
Photo of our sampling method.
Place Studied
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Map this species
N 43.663594 °
W -70.445327 °
Observation Site Information
A photo of our study site.
Upland - Forest
Trip Information
Weeks Road Trail System
Trip date: 
Fri, 2018-10-12 08:00
Town or city: 
Type of investigation: 
Species and Habitat Survey
Habitat Observations
Species diversity: 
3 different species
Evidence of vectors: 
Walking trail
Tree canopy cover: 
Open to 1/4 covered
Soil moisture: 
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