Maine Field Guide to Invasive Aquatic Plants - Brant Lake Milfoil ...

PLANT IDENTIFICATION KEY
All eleven invaders on Maine’s invasive aquatic plant list have characteristics
that place them in one of four categories depicted below.
B A C K G R O U N D
If the plant in question does not fit into at least one of
these categories, you may rule out all eleven invaders!
(This also means that you have likely found a native plant
that is not featured in this guide.)
If the plant in question does fit into one of these
categories, go to the numbered section indicated and
choose between the optional descriptions presented.
Continue making choices until you arrive at a page
number where a possible match for your plant is
featured. In some cases, you will be referred to more
than one plant.
Compare your specimen to the plant or plants indicated.
Also check your specimen against all of the look alike plants
listed for each featured species.
1 2
Floating leaf
plants
Submersed plants with small
(< 5 cm) undivided leaves
arranged along stems
page 13 page 14
3 4
Submersed plants with
larger (> 5 cm)
undivided leaves
alternately arranged
along stems
Submersed plants with
finely divided leaves
page 15 page 16
12 Maine Volunteer Lake Monitoring Program