Invasive SpeciesJapanese knotweed

Fallopia japonica
FOUND by littleriver36
2018-10-12
Gorham
ID Confirmed
Quality checked by CB
Peer reviewed by CB
Field Notes
The Little River group went outside on the Weeks Road trail to investigate and look at the Japanese Knotweed. I was not happy to find this plant because it is an invasive species and it takes over native species and their habitat. My quadrat ,full of Fallopia Japonica, was right next to a sandpit. It also seemed to have a lot of biotic factors in it. It was hard to lay the quadrat down because of all the different plants. If I looked around, I could see lots and lots of vines that wrapped around trees. I could hear cars, and people, and could smell the moist dirt on the ground and the fresh, cool air. I was very surprised by the amount of other plants growing since there was so much Japanese Knotweed in the area.
Supporting Evidence
Photo of my evidence.
The stem of this plant clearly shows that it is Japanese Knotweed. As you can see in the photo, the stem of Fallopia Japonica is very hollow. Japanese Knotweed stems come in a variety of different sizes and can be broad, or very thin. The stems in the photo are on the broader side. The stem looks almost like bamboo with its light green color and brownish-purple rings that go up the stem. They are about 10 inches apart. On the Vital Signs ID card, it says that the stems have purple-ish spots that are scattered on the stem. This plant has all of the above which tells me that it is Japanese Knotweed.
Photo of my evidence.
I know that this plant is Japanese Knotweed because of the flowering. As said in the Vital Signs ID card, the Japanese Knotweed plant has small white flowers that grow in finger-like bunches that are generally longer than the leaf below. In this picture, the plant has many creamy-white flowers that are hanging in clusters from the stalk of the plant. With this information, this plant is definitely Japanese Knotweed.
Photo of my evidence.
The leaves on this plant are arranged in a zigzag pattern or they alternate on the branch. From the Vital Signs ID card I can tell that the leaf type is simple, the leaf shape is oval, and the edge of the leaf is smooth and isn't wavy or toothed. The leaf itself had no texture and was smooth on the top and underside. Also, the leaves were a darker green, but on the lighter side. This plant was definitely 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: 
10-20
Coverage: 
Between 1/2 and 3/4
Reproduction: 
Flower (plants)
Sampling method: 
Quadrat (randomized- placement)
Photo of our sampling method.
Place Studied
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Map this species
Latitude: 
N 43.663641 °
Longitude: 
W -70.445275 °
Observation Site Information
A photo of our study site.
Habitat: 
Upland - Forest
Trip Information
Name:
Weeks Road Trail System
Trip date: 
Fri, 2018-10-12 08:00
Town or city: 
Gorham
Type of investigation: 
Species and Habitat Survey
Ecosystem: 
Upland
Watershed: 
Presumpscot
Habitat Observations
Species diversity: 
3 different species
Evidence of vectors: 
Walking trail
Tree canopy cover: 
Open to 1/4 covered
Soil moisture: 
Moist
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