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What are the leaves like?
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or
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Dissected
leaves:
The leaves are not one single shape, but are feathered or branched.
If small bladders are present it's probably the native
bladderwort. If not, continue. |
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Flat
leaves:
A single leaf that is not forked, branched or feathered. |
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or
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Feathered:
Leaf looks like a bird feather with one main stem and small
leaflets off the main stem.
This could be WATER
MILFOIL. Three milfoils are invasive: Eurasian, Variable,
and Parrot Feather. (Click on the name or the drawing for a
photo.) |
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Branched:
Leaf is like a tree with the main stem forking many times. |
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or
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Opposite
pairs :
Single leaves emerge from the same place on the stem in opposite
pairs.
This is probably FANWORT,
a non-native plant. (Click on the name or the drawing for a
photo.) |
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Whorled
or single leaves:
The leaves all emerge around the stem in the same place (similar
to the spokes of an umbrella).
This is a native plant.
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try flat leaves?>>
start over>>
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or
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Single:
Leaves emerge from the main stem at different places, not whorled
or opposite each other. |
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Whorled:
Three or more leaves all emerge from the stem in the same place.
If there are 4–6 leaves in each whorl, not three, and
the leaf margins are saw-like, it's HYDRILLA,
a non-native plant. If the leaf margins are smooth, and are
in whorls of four, it may be SOUTH
AMERICAN WATER-WEED, another non-native plant. (Click on
the names or the drawing for a photo.) |
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and
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Midvein:
Is there a single dominant vein in the center of the plant?
If yes, then look at the picture on the right. |
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Serrations
and Wavy:
If the leaf margins are saw-like and the leaves are wavy, it's
likely to be CURLY-LEAF
PONDWEED, a non-native plant. (Click on the name or the
drawing for a photo.) |
try dissected leaves?>>
start over>>
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