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

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Flower Structures B A C K G R O U N D flower stigma style anther filament petal sepal Flower parts (side view) pistil stamen perianth Flower parts (top view) Bracts are specialized leaves associated with flowers. Note the “leaf-type” of the bracts and their size in relation to the flowers. bract petal perianth sepal pistil stamen flower bract Bracts are serrated and larger than flowers (variable water-milfoil) Bracts are entire and smaller than flowers (Eurasian water-milfoil) The illustrations below show the emergent flowering spikes of the invasive variable water-milfoil and Eurasian water-milfoil. Not all milfoil species flower above the surface. Variable water-milfoil Eurasian water-milfoil Bracts dominate the flower spike water surface Flowers dominate the flower spike Maine Volunteer Lake Monitoring Program
Stem and Leaf Structures stipule bud blade blade stem node axil petiole stipules node midrib internodal distance node sheath Turions, also called winter buds, are compacted vegetative buds produced along the stem that can overwinter and form a new plant P L A N T S T R U C T U R E leaf blade Stipules are sheath-like tissues associated with the leaf bases of some species stolon Root Structures tubers rhizome tuber corm Maine Volunteer Lake Monitoring Program
Page 1 and 2: Maine Field Guide to Invasive Aquat
Page 3 and 4: Maine Field Guide to Invasive Aquat
Page 5 and 6: FANWORT AND INVASIVE MILFOIL LOOK A
Page 7 and 8: A m a j o r g i f t o f s u p p o r
Page 9 and 10: A C K N O W L E D G E M E N T S Mai
Page 11 and 12: With over 6000 lakes and ponds, and
Page 13 and 14: CAUTION: Even after one has ruled o
Page 15 and 16: Littoral Zone Major Plant Communiti
Page 17: plant structure In order to identif
Page 21 and 22: The four plants depicted below are
Page 23 and 24: 1 Floating Leaf Plants 1. Floating
Page 25 and 26: 3 S u b m e r s e d P l a n t s w i
Page 27 and 28: Invasive Plant Patrol On-Lake Train
Page 29 and 30: Variable water-milfoil I N VA S I V
Page 31 and 32: floating roots not anchored to sedi
Page 33 and 34: floating rosette of leaves submerse
Page 35 and 36: floating leaves Floating leaves oft
Page 37 and 38: Origin and US Range: Fanwort is nat
Page 39 and 40: Origin and US Range: Eurasian water
Page 41 and 42: Origin and US Range: Variable water
Page 43 and 44: Annual Cycle: The invasive milfoil
Page 45 and 46: Origin and US Range: Parrot feather
Page 47 and 48: Origin and US Range: Brazilian wate
Page 49 and 50: submersed stem fruits flowers leave
Page 51 and 52: Curly-leaf pondweed S U B M E R S E
Page 53 and 54: Origin and Range: European naiad is
Page 55 and 56: Origin and Range: Hydrilla is nativ
Page 57 and 58: Relative comparison of leaf-size Di
Page 59 and 60: Fragrant waterlily NATIVE LOOK ALIK
Page 61 and 62: US Range: Both of Maine’s native
Page 63 and 64: habit near base of stem flower frui
Page 65 and 66: Annual Cycle: Mare’s tail is a pe
Page 67 and 68: US Range: Both claspingleaf pondwee
Page 69 and 70:
Annual cycle: Large-leaf pondweed i
Page 71 and 72:
Annual Cycle: Red pondweed is an aq
Page 73 and 74:
to occur in Maine. Annual Cycle: Va
Page 75 and 76:
US Range: White-stem pondweed is na
Page 77 and 78:
emergent flower stalk winter bud FA
Page 79 and 80:
flowers Large purple bladderwort wi
Page 81 and 82:
US Range: Both species are native t
Page 83 and 84:
P. palustris P. pectinata Annual Cy
Page 85 and 86:
Value to the Aquatic Community: The
Page 87 and 88:
US Range: Both water crowfoots are
Page 89 and 90:
Description: All five leafy native
Page 91 and 92:
GR0UP 1 ALTERNATE-FLOWERED WATER-MI
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WHORLED WATER-MILFOIL COMB WATER-MI
Page 95 and 96:
LOW WATER-MILFOIL Myriophyllum humi
Page 97 and 98:
REPRODUCTIVE STRUCTURES AND OTHER D
Page 99 and 100:
Note: A subspecies, Nymphea odorata
Page 101 and 102:
Annual Cycle: Spatterdock over-wint
Page 103 and 104:
Annual Cycle: Little floating heart
Page 105 and 106:
Annual Cycle: Watershield is an aqu
Page 107 and 108:
Range: Northern snail-seed pondweed
Page 109 and 110:
Slender Pondweed Species Comparison
Page 111 and 112:
Origin and Range: Both species are
Page 113 and 114:
leaf branching habit leaf base Slen
Page 115 and 116:
oogonium calcium carbonate barbs E
Page 117 and 118:
such as the Maine DEP) assess the e
Page 119 and 120:
quick, efficient way to determine w
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the water. Very clear lakes may sup
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12. If you are noting dominant nati
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OTHER INVADERS ON MAINE’S RADAR S
Page 127 and 128:
Chinese Mystery Snail (Cipangopalud
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Unauthorized introductions of invas
Page 131 and 132:
aquatic ecosystem. This may in turn
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ut its diminutive size and peoples'
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plant may produce up to 2.5 million
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Didymo is a freshwater diatom that
Page 139 and 140:
A n O u n c e o f P r e v e n t i o
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European) Common Reed (Phragmites a
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Page 28: Page 29: Page 30: Page 31:
Page 145 and 146:
Page 82: Page 83: Page 84: Page 85:
Page 147 and 148:
O t h e r U s e f u l R e s o u r c
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Emergent - Plants have leaves that
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Sub-opposite - Leaves almost opposi
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northern bladderwort . . . . . . .
Page 155 and 156:
Najas gracillima . . . . . . . . .
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Maine Field Guide to Invasive Aquatic Plants - Brant Lake Milfoil ...

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