Invasive SpeciesPurple loosestrife

Lythrum salicaria
NOT FOUND by 2018emh
Falmouth Maine
ID Confirmed
Quality checked by Wilson
Peer reviewed by LF
Field Notes
On Monday, September 17, 2018, our class went outside to look for invasive species. When we went outside it was around 1:00 in the afternoon. The temperature was 75˚F, sunny, and 69% humidity. We were searching along the forest edge behind the middle school. The forest is next to the elementary school playground, a developed area with a lot of kids. The transect along the forest edge was divided into 34 sections, each 5 meters wide. We were searching for 3 specific invasive species in each 5-meter section, glossy buckthorn, multiflora rose, and marrows honeysuckle, but we were only assigned one section. We were mainly focused on looking for invasive species along the edge of the forest, but some people went deeper within there section of the forest section to find their invasive species. In our section, we found all 3 species. We found marrows honeysuckle and glossy buckthorn closer to the edge of the woods, however, we found multiflora rose deeper in the forest in a shady area about a meter away from an oak tree, with no other plants around it for a couple meters. Although all of these species are invasive, multiflora rose seemed to have the greatest impact on the native species because there were no other plants around it and there was a big bush of it meaning it was able to take over and grow efficiently. We also looked for purple loosestrife in our same part of the transect, but that was not in our location. Instead, we found a similar species that was not purple loosestrife.
Supporting Evidence
Photo of my evidence.
Like Purple Loosestrife, the leaves are simple, 6-10 cm, and lance-shaped, but unlike Purple Loosestrife, the leaves have toothed edges and they alternate off the stem whereas Purple Loosestrife is opposite off the stem.
Photo of my evidence.
Like Purple Loosestrife, the stem of this plant is green and hairs small hairs up the stem, but unlike Purple Loosestrife the stem is not square, it is round.
Photo of my evidence.
Like Purple Loosestrife, this plant has a flower spike at the top of the plant, but unlike Purple Loosestrife, this plant doesn’t have 5-7 petals that are pink and purple.
Species Observation: Species Looked For
Did you find it?: 
I think I did not find it
Scientific name:
Lythrum salicaria
Common name:
Purple loosestrife
Sampling method: 
Photo of our sampling method.
Place Studied
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Map this species
N 43.738950 °
W -70.275540 °
Observation Site Information
A photo of our study site.
Upland - Forest
Trip Information
2018 Woods behind the school
Trip date: 
Tue, 2018-09-18 07:44
Town or city: 
Falmouth Maine
Type of investigation: 
Species Survey
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