20Dave
Hanson,,Universityof
Minnesota
1-17-2010
Snow fleas on a
warm January Day
20Dave
Hanson,,Universityof
Minnesota
Snow fleas on a
warm January Day 1-17-2010
20Dave
Hanson,,Universityof
Minnesota
Brown ambrosia aphid
on Jerusalem artichoke
Notice the cornicles
an Id characteristi...
20Dave
Hanson,,Universityof
Minnesota Ambrosia aphid on
Jerusalem artichoke
20Dave
Hanson,,Universityof
Minnesota
Oleander aphids on
Swamp milkweed
Aphis nerii
20Dave
Hanson,,Universityof
Minnesota Aphids and
Associated damage
On Green Ash
20Dave
Hanson,,Universityof
Minnesota
Woolly
Aphids
on
speckled
alder
Paraprociphilus tessellatus
20Dave
Hanson,,Universityof
Minnesota
Woolly Apple
Aphids
(Erisoma
lanigerum)
20Dave
Hanson,,Universityof
Minnesota
Balsam twig aphid
Or Balsam wooly adelgid
balsam fir
20Dave
Hanson,,Universityof
Minnesota
Spittle bug
on goldenrod
20Dave
Hanson,,Universityof
MinnesotaFir broom rust
on
Abies balsamea
20Dave
Hanson,,Universityof
Minnesota
Hackberry Witches
Broom ...
Eriophyid mite and Powdery Mildew
20Dave
Hanson,,Universityof
Minnesota
Phomopsis galls on
Bitternut Hickory
2010-3-22
20Dave
Hanson,,Universityof
Minnesota
Salt spray
accumulation
Causes witches brooms
2-23-2008
2-23-2008
20Dave
Hanson,,Universityof
Minnesota
Witches broom caused
by
Salt spray
accumulation
2-7-2008
20Dave
Hanson,,Universityof
Minnesota
Frost damage on
Bur Oak
20Dave
Hanson,,Universityof
Minnesota
Hackberry Tatters ...
Suspected - herbicide damage
to buds
5-26-2004
20Dave
Hanson,,Universityof
Minnesota
Photo Taken: 7-29-09
Japanese Beetle – Defoliator...
Popillia japonica Newman
20Dave
Hanson,,Universityof
Minnesota
Photo Taken: 8-24-09
Japanese Beetle – Defoliator... Popillia japonica Newman
20Dave
Hanson,,Universityof
Minnesota Photo Taken: 8-24-09
Japanese Beetle – Defoliator... Popillia japonica Newman
20Dave
Hanson,,Universityof
Minnesota
Photo Taken: 7-29-09
Japanese Beetle – Defoliator...
Popillia japonica Newman
20Dave
Hanson,,Universityof
Minnesota
European elm flea weevil
A first report for Minnesota
8-05-09
Adult
feeding
activity...
20Dave
Hanson,,Universityof
Minnesota
Emerald ash borer
Agrilus planipennis Fairmaire
20Dave
Hanson,,Universityof
Minnesota
Purple Trap for
Emerald ash borer (EAB)
Photo taken at the Gateway Arch in
St. Louis...
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
Annual Cicada ... Tibicen canicularis
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
Locust borer ... Megacyllene robiniae
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
Calligrapha species
on ninebark
20Dave
Hanson,,Universityof
Minnesota
Tar spot on
Silver maple
20Dave
Hanson,,Universityof
Minnesota
Eyespot gall
on Acer rubrum
20Dave
Hanson,,Universityof
Minnesota
Eriophyid mite
galls
Silver maple
2008-6-19
20Dave
Hanson,,Universityof
Minnesota
Eriophyid mites
Spindle Gall
on American
Plum
Photo: 6-17-09
20Dave
Hanson,,Universityof
Minnesota
Erineum Gall
on Viburnum
Photo: 9-01-09
Eriophyid mites
20Dave
Hanson,,Universityof
Minnesota
Ash flower gall
(mites)
On green ash
20Dave
Hanson,,Universityof
Minnesota
Sawfly larvae
on
Mugo pine
20Dave
Hanson,,Universityof
Minnesota Sawfly and
damage on
Red pine
20Dave
Hanson,,Universityof
Minnesota
Forest tent
caterpillar
newly emerged
2010-4-13
20Dave
Hanson,,Universityof
Minnesota
Forest tent
caterpillar
20Dave
Hanson,,Universityof
Minnesota
Forest tent
caterpillar
4-30-07
Same Twig
5-10-07
20Dave
Hanson,,Universityof
Minnesota Eastern tent caterpillar
On choke-cherry
20Dave
Hanson,,Universityof
Minnesota
Eastern tent caterpillar
Eggmass
On choke-cherry
20Dave
Hanson,,Universityof
Minnesota
Loopers or inch-worms
on little-leaf linden
20Dave
Hanson,,Universityof
Minnesota
Spiny Elm Caterpillar
on Hackberry
20Dave
Hanson,,Universityof
Minnesota
New Old
Eastern spruce gall
(adelgid)
White spruce
20Dave
Hanson,,Universityof
Minnesota
Noxious Gall on
Swamp white Oak
(Cynipid wasp)
20Dave
Hanson,,Universityof
Minnesota
Bullet gall on
Bur oak
20Dave
Hanson,,Universityof
Minnesota
20Dave
Hanson,,Universityof
Minnesota Wooly adelgid on
Douglas fir
20Dave
Hanson,,Universityof
Minnesota Wooly adelgid
on
Douglas fir
20Dave
Hanson,,Universityof
Minnesota
Scurfy Scale
on Quaking Aspen
20Dave
Hanson,,Universityof
Minnesota
Walking stick or stick
bug
Photo: 9-12-09
20Dave
Hanson,,Universityof
Minnesota
Northern Paper
Wasp
Devouring a caterpillar
Photo: 9-12-09
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
Boxelder bug –
adult and nymphs
09-01-2009
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
Plant Hopper
2010-8-12
09-01-2009
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
Green Darner
(female)
2010-8-15
09-01-2009
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
Verticillium wilt ...
Staining of vascular tissue
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
erticillium wilt ... Staining of vascular tissue
20Dave
Hanson,,Universityof
Minnesota
Herbicide damage ?
No!
‘Contorta’ white pine
20Dave
Hanson,,Universityof
Minnesota
Iron chlorosis on
Pin oak
20Dave
Hanson,,Universityof
Minnesota
Anthracnose on
Bur Oak
20Dave
Hanson,,Universityof
Minnesota
Quince rust on
Hawthorn
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
11-07-2009
Cedar-Hawthorn Rust
or Cedar-apple rust
20Dave
Hanson,,Universityof
Minnesota
Cedar apple rust
On
Eastern Red Cedar
20Dave
Hanson,,Universityof
Minnesota
Cedar-Hawthorn rust
Upper leaf surface
on Hawthorn
20Dave
Hanson,,Universityof
Minnesota
Cedar-hawthorn rust
Aecia –
underside of leaf
20Dave
Hanson,,Universityof
Minnesota
Red admiral on
Little-leaf linden
20Dave
Hanson,,Universityof
Minnesota
Frost crack and
associated internal decay
Red maple
20Dave
Hanson,,Universityof
Minnesota
Black knot on
Black cherry
20Dave
Hanson,,Universityof
Minnesota
Sapsucker damage on:
Eastern red cedar Butternut
20Dave
Hanson,,Universityof
Minnesota
Sapsucker damage on:
Paper Birch
20Dave
Hanson,,Universityof
Minnesota
Rabbit damage
crabapple
20Dave
Hanson,,Universityof
Minnesota Volcano mulching
Or
Architectural mulching
20Dave
Hanson,,Universityof
Minnesota
Proper Staking ??
NO!
Nails are not acceptable
Wire through hose is not acceptable
C...
20Dave
Hanson,,Universityof
Minnesota
Proper Staking
Wide straps
Stem is protected
3 taut connections
20Dave
Hanson,,Universityof
Minnesota
Birds nest fungi
in mulch
20Dave
Hanson,,Universityof
Minnesota
Dog-vomit slime mold
Fuligo septica
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
Stinkhorn fungi
Lizard’s claw
Lysurus cruciatus
A rare site in
...
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
Stinkhorn fungi
Ravenal’s stinkhorn
Phallus ravenelii
2010-10-17
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
Wood decay fungi
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
Wood decay fungi
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
Wood decay fungi
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
Wood decay fungi on poplar
2008-6-21
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
Wood decay fungi on American elm
2006-9-25
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
Wood decay fungi
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
Wood decay fungi
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
Wood decay fungi on Populus tremuloides
2006-10-2
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
Wood decay fungi on Box elder
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
Rhizomorphs of
Armillaria root rot
20Dave
Hanson,,Universityof
Minnesota
Sensitive fern
Onoclea sensibilis
20Dave
Hanson,,Universityof
Minnesota High-bush cranberry
Viburnum trilobum
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
Beaked Hazel ...
Corylus cornuta
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
Smilax sp ...
dioecious
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
Ginkgo Biloba
dioecious
20Dave
Hanson,,Universityof
Minnesota
Bristly
greenbrier
in winter
Smilax tamnoides
American hops
in winter
Humulus lupulus
20Dave
Hanson,,Universityof
Minnesota
Moonseed
in winter
Menispermum
canadense
Bittersweet
in autumn
Celastrus
scandens
20Dave
Hanson,,Universityof
Minnesota Poison Ivy
20Dave
Hanson,,Universityof
Minnesota
Flowers of Sugar maple
Male and Female flowers
are present, often on the
same branch
20Dave
Hanson,,Universityof
Minnesota
4-17-2009
Flowers of
red maple
Male -Staminate Female - Pistillate
20Dave
Hanson,,Universityof
Minnesota
Flowers of
boxelder
20Dave
Hanson,,Universityof
Minnesota
Korean Mountain
Ash
Sorbus alnifolia
20Dave
Hanson,,Universityof
Minnesota
Autumn
Blossom
of
Witchhaze
l
Hamamelis
virginiana
20Dave
Hanson,,Universityof
Minnesota
Ribes spp.
blossom
near
Cotton,
MN.
2010-4-18
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
Austrian Pine
Pinus nigra
Pollen release
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
11-07-2009
Scots Pine
Pinus sylvestris
Buds,
2-needle pine,
sto...
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
Sour Cherry ... Prunus cerasus
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
Eastern Cottonwood ...
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
Hackberry, Celtis occidentalis
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
Black Chokeberry ...
Aronia melanocarpa
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
Black Chokeberry ...
Aronia melanocarpa
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
Winterberry ...
Ilex verticilatta
20Dave
Hanson,,Universityof
Minnesota
Photo Taken:
9-14-09
Red Oak ...
Quercus rubra
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Dave Hanson's Bugs and Tree Cruds 2010-10-25

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A collection of images identifying common insects, fungi and issues in our urban forest.
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  • Curtis young – Joe Boggs and others from The Ohio State University identified this critter on hybrid elms in TRE
  • Annual cicada – about the size of your thumb – much to large for EAB – but often green and often collected and put forth as a possible EAB find.
  • Annual cicada – about the size of your thumb – much to large for EAB – but often green and often collected and put forth as a possible EAB find.
  • Dave Hanson's Bugs and Tree Cruds 2010-10-25

    1. 1. 20Dave Hanson,,Universityof Minnesota 1-17-2010 Snow fleas on a warm January Day
    2. 2. 20Dave Hanson,,Universityof Minnesota Snow fleas on a warm January Day 1-17-2010
    3. 3. 20Dave Hanson,,Universityof Minnesota Brown ambrosia aphid on Jerusalem artichoke Notice the cornicles an Id characteristic for aphids Uroleucon ambrosiae
    4. 4. 20Dave Hanson,,Universityof Minnesota Ambrosia aphid on Jerusalem artichoke
    5. 5. 20Dave Hanson,,Universityof Minnesota Oleander aphids on Swamp milkweed Aphis nerii
    6. 6. 20Dave Hanson,,Universityof Minnesota Aphids and Associated damage On Green Ash
    7. 7. 20Dave Hanson,,Universityof Minnesota Woolly Aphids on speckled alder Paraprociphilus tessellatus
    8. 8. 20Dave Hanson,,Universityof Minnesota Woolly Apple Aphids (Erisoma lanigerum)
    9. 9. 20Dave Hanson,,Universityof Minnesota Balsam twig aphid Or Balsam wooly adelgid balsam fir
    10. 10. 20Dave Hanson,,Universityof Minnesota Spittle bug on goldenrod
    11. 11. 20Dave Hanson,,Universityof MinnesotaFir broom rust on Abies balsamea
    12. 12. 20Dave Hanson,,Universityof Minnesota Hackberry Witches Broom ... Eriophyid mite and Powdery Mildew
    13. 13. 20Dave Hanson,,Universityof Minnesota Phomopsis galls on Bitternut Hickory 2010-3-22
    14. 14. 20Dave Hanson,,Universityof Minnesota Salt spray accumulation Causes witches brooms 2-23-2008 2-23-2008
    15. 15. 20Dave Hanson,,Universityof Minnesota Witches broom caused by Salt spray accumulation 2-7-2008
    16. 16. 20Dave Hanson,,Universityof Minnesota Frost damage on Bur Oak
    17. 17. 20Dave Hanson,,Universityof Minnesota Hackberry Tatters ... Suspected - herbicide damage to buds 5-26-2004
    18. 18. 20Dave Hanson,,Universityof Minnesota Photo Taken: 7-29-09 Japanese Beetle – Defoliator... Popillia japonica Newman
    19. 19. 20Dave Hanson,,Universityof Minnesota Photo Taken: 8-24-09 Japanese Beetle – Defoliator... Popillia japonica Newman
    20. 20. 20Dave Hanson,,Universityof Minnesota Photo Taken: 8-24-09 Japanese Beetle – Defoliator... Popillia japonica Newman
    21. 21. 20Dave Hanson,,Universityof Minnesota Photo Taken: 7-29-09 Japanese Beetle – Defoliator... Popillia japonica Newman
    22. 22. 20Dave Hanson,,Universityof Minnesota European elm flea weevil A first report for Minnesota 8-05-09 Adult feeding activity Orchestes alni A side view of the Elm flea weevil. Photo credit: Jim Zablotny, USDA/APHIS/PPQ. Blotch mines caused by larvae
    23. 23. 20Dave Hanson,,Universityof Minnesota Emerald ash borer Agrilus planipennis Fairmaire
    24. 24. 20Dave Hanson,,Universityof Minnesota Purple Trap for Emerald ash borer (EAB) Photo taken at the Gateway Arch in St. Louis, MO July of 2008
    25. 25. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Annual Cicada ... Tibicen canicularis
    26. 26. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Locust borer ... Megacyllene robiniae
    27. 27. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Calligrapha species on ninebark
    28. 28. 20Dave Hanson,,Universityof Minnesota Tar spot on Silver maple
    29. 29. 20Dave Hanson,,Universityof Minnesota Eyespot gall on Acer rubrum
    30. 30. 20Dave Hanson,,Universityof Minnesota Eriophyid mite galls Silver maple 2008-6-19
    31. 31. 20Dave Hanson,,Universityof Minnesota Eriophyid mites Spindle Gall on American Plum Photo: 6-17-09
    32. 32. 20Dave Hanson,,Universityof Minnesota Erineum Gall on Viburnum Photo: 9-01-09 Eriophyid mites
    33. 33. 20Dave Hanson,,Universityof Minnesota Ash flower gall (mites) On green ash
    34. 34. 20Dave Hanson,,Universityof Minnesota Sawfly larvae on Mugo pine
    35. 35. 20Dave Hanson,,Universityof Minnesota Sawfly and damage on Red pine
    36. 36. 20Dave Hanson,,Universityof Minnesota Forest tent caterpillar newly emerged 2010-4-13
    37. 37. 20Dave Hanson,,Universityof Minnesota Forest tent caterpillar
    38. 38. 20Dave Hanson,,Universityof Minnesota Forest tent caterpillar 4-30-07 Same Twig 5-10-07
    39. 39. 20Dave Hanson,,Universityof Minnesota Eastern tent caterpillar On choke-cherry
    40. 40. 20Dave Hanson,,Universityof Minnesota Eastern tent caterpillar Eggmass On choke-cherry
    41. 41. 20Dave Hanson,,Universityof Minnesota Loopers or inch-worms on little-leaf linden
    42. 42. 20Dave Hanson,,Universityof Minnesota Spiny Elm Caterpillar on Hackberry
    43. 43. 20Dave Hanson,,Universityof Minnesota New Old Eastern spruce gall (adelgid) White spruce
    44. 44. 20Dave Hanson,,Universityof Minnesota Noxious Gall on Swamp white Oak (Cynipid wasp)
    45. 45. 20Dave Hanson,,Universityof Minnesota Bullet gall on Bur oak
    46. 46. 20Dave Hanson,,Universityof Minnesota
    47. 47. 20Dave Hanson,,Universityof Minnesota Wooly adelgid on Douglas fir
    48. 48. 20Dave Hanson,,Universityof Minnesota Wooly adelgid on Douglas fir
    49. 49. 20Dave Hanson,,Universityof Minnesota Scurfy Scale on Quaking Aspen
    50. 50. 20Dave Hanson,,Universityof Minnesota Walking stick or stick bug Photo: 9-12-09
    51. 51. 20Dave Hanson,,Universityof Minnesota Northern Paper Wasp Devouring a caterpillar Photo: 9-12-09
    52. 52. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Boxelder bug – adult and nymphs 09-01-2009
    53. 53. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Plant Hopper 2010-8-12 09-01-2009
    54. 54. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Green Darner (female) 2010-8-15 09-01-2009
    55. 55. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Verticillium wilt ... Staining of vascular tissue
    56. 56. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 erticillium wilt ... Staining of vascular tissue
    57. 57. 20Dave Hanson,,Universityof Minnesota Herbicide damage ? No! ‘Contorta’ white pine
    58. 58. 20Dave Hanson,,Universityof Minnesota Iron chlorosis on Pin oak
    59. 59. 20Dave Hanson,,Universityof Minnesota Anthracnose on Bur Oak
    60. 60. 20Dave Hanson,,Universityof Minnesota Quince rust on Hawthorn
    61. 61. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 11-07-2009 Cedar-Hawthorn Rust or Cedar-apple rust
    62. 62. 20Dave Hanson,,Universityof Minnesota Cedar apple rust On Eastern Red Cedar
    63. 63. 20Dave Hanson,,Universityof Minnesota Cedar-Hawthorn rust Upper leaf surface on Hawthorn
    64. 64. 20Dave Hanson,,Universityof Minnesota Cedar-hawthorn rust Aecia – underside of leaf
    65. 65. 20Dave Hanson,,Universityof Minnesota Red admiral on Little-leaf linden
    66. 66. 20Dave Hanson,,Universityof Minnesota Frost crack and associated internal decay Red maple
    67. 67. 20Dave Hanson,,Universityof Minnesota Black knot on Black cherry
    68. 68. 20Dave Hanson,,Universityof Minnesota Sapsucker damage on: Eastern red cedar Butternut
    69. 69. 20Dave Hanson,,Universityof Minnesota Sapsucker damage on: Paper Birch
    70. 70. 20Dave Hanson,,Universityof Minnesota Rabbit damage crabapple
    71. 71. 20Dave Hanson,,Universityof Minnesota Volcano mulching Or Architectural mulching
    72. 72. 20Dave Hanson,,Universityof Minnesota Proper Staking ?? NO! Nails are not acceptable Wire through hose is not acceptable Connections Too Rigid
    73. 73. 20Dave Hanson,,Universityof Minnesota Proper Staking Wide straps Stem is protected 3 taut connections
    74. 74. 20Dave Hanson,,Universityof Minnesota Birds nest fungi in mulch
    75. 75. 20Dave Hanson,,Universityof Minnesota Dog-vomit slime mold Fuligo septica
    76. 76. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Stinkhorn fungi Lizard’s claw Lysurus cruciatus A rare site in Anoka County,MN Photographer: Unknown
    77. 77. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Stinkhorn fungi Ravenal’s stinkhorn Phallus ravenelii 2010-10-17
    78. 78. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Wood decay fungi
    79. 79. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Wood decay fungi
    80. 80. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Wood decay fungi
    81. 81. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Wood decay fungi on poplar 2008-6-21
    82. 82. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Wood decay fungi on American elm 2006-9-25
    83. 83. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Wood decay fungi
    84. 84. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Wood decay fungi
    85. 85. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Wood decay fungi on Populus tremuloides 2006-10-2
    86. 86. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Wood decay fungi on Box elder
    87. 87. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Rhizomorphs of Armillaria root rot
    88. 88. 20Dave Hanson,,Universityof Minnesota Sensitive fern Onoclea sensibilis
    89. 89. 20Dave Hanson,,Universityof Minnesota High-bush cranberry Viburnum trilobum
    90. 90. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Beaked Hazel ... Corylus cornuta
    91. 91. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Smilax sp ... dioecious
    92. 92. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Ginkgo Biloba dioecious
    93. 93. 20Dave Hanson,,Universityof Minnesota Bristly greenbrier in winter Smilax tamnoides American hops in winter Humulus lupulus
    94. 94. 20Dave Hanson,,Universityof Minnesota Moonseed in winter Menispermum canadense Bittersweet in autumn Celastrus scandens
    95. 95. 20Dave Hanson,,Universityof Minnesota Poison Ivy
    96. 96. 20Dave Hanson,,Universityof Minnesota Flowers of Sugar maple Male and Female flowers are present, often on the same branch
    97. 97. 20Dave Hanson,,Universityof Minnesota 4-17-2009 Flowers of red maple Male -Staminate Female - Pistillate
    98. 98. 20Dave Hanson,,Universityof Minnesota Flowers of boxelder
    99. 99. 20Dave Hanson,,Universityof Minnesota Korean Mountain Ash Sorbus alnifolia
    100. 100. 20Dave Hanson,,Universityof Minnesota Autumn Blossom of Witchhaze l Hamamelis virginiana
    101. 101. 20Dave Hanson,,Universityof Minnesota Ribes spp. blossom near Cotton, MN. 2010-4-18
    102. 102. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Austrian Pine Pinus nigra Pollen release
    103. 103. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 11-07-2009 Scots Pine Pinus sylvestris Buds, 2-needle pine, stomate lines
    104. 104. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Sour Cherry ... Prunus cerasus
    105. 105. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Eastern Cottonwood ...
    106. 106. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Hackberry, Celtis occidentalis
    107. 107. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Black Chokeberry ... Aronia melanocarpa
    108. 108. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Black Chokeberry ... Aronia melanocarpa
    109. 109. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Winterberry ... Ilex verticilatta
    110. 110. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Red Oak ... Quercus rubra

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