Japanese knotweed
Field Notes
Supporting Evidence
The alternet arrangement and oval shape of the leaves lead me to belive that this is Fallopia japonica. Also, the white flowers are a sign.
This plant also has bambo like stems which is anothr sign.
Species Observation: Species Looked For
Did you find it?:
I think I found it
Scientific name:
Fallopia japonicaCommon name:
Japanese knotweed
Sampling method:
Just looking around
Place Studied
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Map this species
Latitude:
N 43.451950 °
Longitude:
W -70.780770 °
Observation Site Information
Habitat:
Upland - Developed areas
Trip Information
Name:
High School Sighting
Trip date:
Wed, 2012-09-12 21:10
Town or city:
Sanford
Type of investigation:
Species Survey
Ecosystem:
Upland
Watershed:
Comments
your plant
the ones here smell sweet
your plant
i seen that one here in Indiana off a bike trail
Yes manyeyes, it's all over the place!!
I've seen so much of it that I can't remember all of the locations. As I said in my last investigation, it's all over Alfred, Waterboro, and Sanford. I believe the biggest grouping I've ever seen was in Alfred, which I'm still waiting to investigate. I'm going to try to put more investigations out and quicker. I see it everywhere, identify has become second nature to me. I'll be in the car and see it on the side of the road. I've said it so many times that my parents even can see it when they drive.
Watch out Fallopia, here comes JK14
Your profile page with ALL of your observations listed from ALL of these towns will look AWESOME when you've documented all of the stands of knotweed you've seen! ...not to mention the great dataset you'll have contributed! Go get 'em.
I did check which type
Somehow I got distracted and did not add that I had checked the back of the leaves. I know I had read somewhere that the hairs fall off when mature. I had checked a younger plant located in front, and found nothing on either plants.
excellent!
Excellent! It's great to hear that you checked the undersides of the young leaves for hairs. Proof positive that what you saw was F. japonica and not F. sachalinensis
the knotweeds
Hi JK14,
Thanks for sharing your find! Judging by the shape of the leaves in your images and the relative size of leaves to flowers and leaves to stem, I'm agreeing with you that you saw F. japonica.
pparent raises a good question, however, about which knotweed you saw. There are two species in Maine: F. japonica (vitalsignsme.org/sites/default/files/content/ui_fallopia_japonica_062912.pdf) and F. sachalinensis (vitalsignsme.org/sites/default/files/content/ui_fallopia_sachalinensis_071012_0.pdf). If those links don't work for you, go here http://vitalsignsme.org/species-identification-resources#UI and find them in the list.
Leaf size, hairs or lack thereof on the bottom of the leaves are the key distinguishing features. If you see any more knotweed see if you can identify which species it is!
Thanks again for publishing your data.
cheers,
gbh
knotty
That's a seriously long stretch of Japanese knotweed along the road!
Thanks for capturing all of the defining characteristics of Japanese knotweed in your photos. The flat leaf bases tell me that this is Japanese knotweed, not giant knotweed (giant knotweed has rounded bases so its leaves look more heart-shaped).
Are you seeing Japaense knotweed in other places in Sanford too?
More fabulous knotweed observations, please!!
Nice job JK14
Sure looks like you found Fallopia japonica. It sure seems to be everywhere these days, doesn't it. Much easier to see when it is in bloom. Did you get a chance to see what type of Knotweed?