Invasive SpeciesJapanese knotweed

Fallopia japonica
FOUND by littleriver6
ID Confirmed
Quality checked by C.Ly
Peer reviewed by C.Ly
Field Notes
My whole class went onto the Weeks trail road system to collect our data. Right as I got outside, I noticed it was pretty cold out. When we got to our longitude and latitude site, we thought there was Japanese knotweed. We discovered it was Japanese Knotweed. We set our quadrat down and started to collect our data. The air smelled like coldness. You could even see your own breathe. I heard the wind and people talking. Also, you could hear cars on a road nearby. Right away you could tell the plant was tall. It was all green except for white flowers at the ends of the branches. There were vines and leaves everywhere. We continued to collect data, and discovered that the bamboo was hollow. When we were done collecting our data, we moved on to another site.
Supporting Evidence
Photo of my evidence.
The leaves on the plant were mostly green. They were all very big. The leaves measured to be 7 inches. They were in an oval shape with the edges being smooth. There was a point at the very top of the leaf, but it was smooth at the top. All of this data matches to the Vital Signs ID card.
Photo of my evidence.
The leaves on the Japanese Knotweed were mostly green. I then notices that some of the leaves were starting to turn yellow. Then I looked at the bamboo and I realized it was starting to turn brown. Also, the flowers were starting to fall off. I did some research and according to the Vital Signs ID card, All of these things occur when it's almost time for winter. For example the leaves turn yellow and fall off the plant before winter.
Photo of my evidence.
According to Vital Signs, the stem of the Japenese Knotweed should be hallow and green. I noticed that the stem of the plant we found was green. We didn't know how to figure out if it was hallow or not. Luckily we found a dead stem and figured out it was hallow.
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: 
Between 1/4 and 1/2
Flower (plants)
Pollinators (plants)
Sampling method: 
Quadrat (randomized- placement)
Photo of our sampling method.
Place Studied
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Map this species
N 43.664170 °
W -70.445560 °
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: 
1 different species
Evidence of vectors: 
Walking trail
Tree canopy cover: 
Between 1/4 and 1/2
Soil moisture: 


Hi littleriver6,

It looks like coordinates are a bit off. Please respond to this comment with the correct coordinates, and we'll get you back on track.

-The Vital Signs Team

The coordinates that I entered on Google Earth were 43°39’51”N and -70°26’44”W. Does this work as my coordinates?

Thanks in advance!

Hi littleriver6,

I converted your coordinates from minutes and seconds to decimal degrees, and it looks like you're back where you need to be. If you post another observation, make sure the coordinates are in decimal degrees.

-The Vital Signs Team