| 5454056 |
butternut |
Juglans cinerea |
butternut winter twig (Juglans cinerea); tree was recorded in Ontario's NHIC rare plant database; it was later tested and is in fact pure |
| 5492631 |
pin oak |
Quercus palustris |
pin oak, Quercus palustris; acorns developing in their 2nd year (bottom) and newly developed/current year acorns on current year's growth (top); June 14, 2012 |
| 5492630 |
bur oak |
Quercus macrocarpa |
bur oak, Quercus macrocarpa developing leaves and acorns; June 14, 2012 |
| 5492629 |
black cherry |
Prunus serotina |
mature black cherry, Prunus serotina |
| 5491408 |
shagbark hickory |
Carya ovata |
shagbark hickory, Carya ovata |
| 5488145 |
northern catalpa |
Catalpa speciosa |
northern catalpa (Catalpa speciosa) whorled bud arrangement; Great Lakes Forestry Centre Arboretum |
| 5488142 |
paper birch |
Betula papyrifera |
white birch (Betula papyrifera) spur shoots; large terminal bud of American mountain ash (Sorbus americana) clearly visible in the background |
| 5488134 |
red maple |
Acer rubrum |
red maple (Acer rubrum) |
| 5488140 |
red maple |
Acer rubrum |
red maple (Acer rubrum) |
| 5488137 |
northern red oak |
Quercus rubra |
northern red oak (Quercus rubra) |
| 5488136 |
black ash |
Fraxinus nigra |
black ash (Fraxinus nigra) |
| 5488135 |
black ash |
Fraxinus nigra |
black ash (Fraxinus nigra) |
| 5488130 |
American mountain ash |
Sorbus americana |
American mountain ash (Sorbus americana) |
| 5488129 |
American mountain ash |
Sorbus americana |
American mountain ash (Sorbus americana) |
| 5451457 |
ambermarked birch leafminer |
Profenusa thomsoni |
|
| 5474412 |
bitternut hickory |
Carya cordiformis |
Carya cordiformis |
| 5474410 |
blue ash |
Fraxinus quadrangulata |
Fraxinus quadrangulata |
| 5474409 |
Kentucky coffeetree |
Gymnocladus dioicus |
Gymnocladus dioica bi-pinnately compound leaves |
| 5474258 |
silver maple |
Acer saccharinum |
Acer saccharinum; typical open growth form |
| 5474395 |
American hornbeam |
Carpinus caroliniana |
Carpinus caroliniana developing fruit |
| 5474401 |
butternut |
Juglans cinerea |
young butternut tree |
| 5474405 |
hophornbeam |
Ostrya virginiana |
Ostrya virginiana developing fruit, early July |
| 5474406 |
hophornbeam |
Ostrya virginiana |
Ostrya virginiana developing fruit, early July |
| 5474407 |
black walnut |
Juglans nigra |
Juglans nigra developing fruit, early July |
| 5473042 |
northern red oak |
Quercus rubra |
Quercus rubra (northern red oak) developing female flowers on 'scrub' oak near cliff edge; late May |
| 5474091 |
shagbark hickory |
Carya ovata |
Carya ovata (shagbark hickory) |
| 5474092 |
shagbark hickory |
Carya ovata |
Carya ovata (shagbark hickory) |
| 5473069 |
catberry |
Ilex mucronata |
male flower and developing leaves on Ilex mucronata (syn. Nemopanthus mucronatus), mountain-holly |
| 5473041 |
northern red oak |
Quercus rubra |
Quercus rubra (northern red oak) male flowers on 'scrub' oak near cliff edge; late May |
| 5473040 |
northern red oak |
Quercus rubra |
Quercus rubra (northern red oak) developing 2nd year acorn on 'scrub' oak near cliff edge; late May |
| 5472598 |
yellow birch |
Betula alleghaniensis |
Betula alleghaniensis (yellow birch) |
| 5472349 |
bog birch |
Betula pumila |
Betula pumila (bog birch) female catkin |
| 5472351 |
bog birch |
Betula pumila |
Betula pumila (bog birch) catkins (pinkish-red stigmas are visible on female catkins) |
| 5472358 |
bog birch |
Betula pumila |
Betula pumila (bog birch) female catkin |
| 5472382 |
mountain alder |
Alnus viridis ssp. crispa |
Alnus viridis subsp. crispa (green alder/mountain alder) male and female catkins |
| 5472381 |
mountain alder |
Alnus viridis ssp. crispa |
Alnus viridis subsp. crispa (green alder/mountain alder) receptive female catkins |
| 5472378 |
bog willow |
Salix pedicellaris |
Salix pedicellaris (bog willow) male plant/catkins |
| 5472369 |
bog birch |
Betula pumila |
Betula pumila (bog birch) catkins (pinkish-red stigmas are visible on female catkins) |
| 5472368 |
bog birch |
Betula pumila |
Betula pumila (bog birch) developing male catkin |
| 5472341 |
bog birch |
Betula pumila |
developing male catkin on Betula pumila (bog birch) |
| 5474028 |
northern catalpa |
Catalpa speciosa |
Catalpa speciosa (northern catalpa) |
| 5472119 |
hophornbeam |
Ostrya virginiana |
ironwood (Ostrya virginiana) mature bark |
| 5472118 |
yellow birch |
Betula alleghaniensis |
yellow birch (Betula alleghaniensis) |
| 5473971 |
sassafras |
Sassafras albidum |
Sassafras albidum seedling |
| 5473970 |
sassafras |
Sassafras albidum |
Sassafras albidum seedlings |
| 5473967 |
Norway maple |
Acer platanoides |
Norway maple (Acer platanoides) developing seeds |
| 5472104 |
hophornbeam |
Ostrya virginiana |
male ironwood (Ostrya virginiana) catkins expanding |
| 5473466 |
hedge maple |
Acer campestre |
Acer campestre (hedge maple) developing fruit |
| 5472560 |
yellow birch |
Betula alleghaniensis |
Betula alleghaniensis (yellow birch) |
| 5472075 |
striped maple |
Acer pensylvanicum |
striped maple (Acer pensylvanicum) terminal bud breaking |
| 5472064 |
beaked hazelnut |
Corylus cornuta |
beaked hazel (Corylus cornuta) female flower |
| 5472053 |
beaked hazelnut |
Corylus cornuta |
beaked hazel (Corylus cornuta) remnant fruiting structures |
| 5473458 |
mountain maple |
Acer spicatum |
Acer spicatum (mountain maple) characteristic upright flower spike |
| 5472048 |
striped maple |
Acer pensylvanicum |
striped maple (Acer pensylvanicum) seedling |
| 5468119 |
speckled alder |
Alnus incana ssp. rugosa |
Male and Female catkins of a speckled alder during winter |
| 5468155 |
speckled alder |
Alnus incana ssp. rugosa |
Speckled alder silhouette |
| 5468128 |
speckled alder |
Alnus incana ssp. rugosa |
bark of a pin cherry |
| 5454120 |
hophornbeam |
Ostrya virginiana |
ironwood (Ostrya virginiana) male catkins |
| 5447069 |
boxelder |
Acer negundo |
Manitoba maple/box-elder winter twig (Acer negundo) |
| 5444933 |
shingle oak |
Quercus imbricaria |
Shingle Oak, Quercus imbricaria (September 1, 2011) |
| 5471244 |
American sycamore |
Platanus occidentalis |
Fruiting body of a Sycamore. |
| 5471245 |
American sycamore |
Platanus occidentalis |
Twigs and buds of a Sycamore. |
| 5471247 |
American sycamore |
Platanus occidentalis |
Sycamore leaf. |
| 5471243 |
American sycamore |
Platanus occidentalis |
Bark of a Sycamore. |
| 5468144 |
quaking aspen |
Populus tremuloides |
trembling aspen buds beginning to bloom |
| 5468142 |
common chokecherry |
Prunus virginiana |
terminal bud |
| 5468087 |
red maple |
Acer rubrum |
Red maple opposite branching and clustered buds |
| 5468098 |
paper birch |
Betula papyrifera |
White birch catkins and branch form. |
| 5468145 |
hawthorn |
Crataegus spp. |
Terminal bud and thorns of a hawthorn |
| 5468159 |
willow |
Salix spp. |
willow tree beginning to bloom |
| 5468148 |
alternateleaf dogwood |
Cornus alternifolia |
silhouette of a alternate-leaf dogwood |
| 5468141 |
American elm |
Ulmus americana |
branching pattern of a white elm |
| 5468133 |
American elm |
Ulmus americana |
Branching pattern of a white elm |
| 5468164 |
American beech |
Fagus grandifolia |
Terminal bud of an American beech |
| 5468120 |
speckled alder |
Alnus incana ssp. rugosa |
Buds and twig |
| 5468126 |
crabapple and apple |
Malus spp. |
Terminal bud of an apple tree |
| 5468127 |
boxelder |
Acer negundo |
bud and branch of a manitoba maple |
| 5468143 |
common chokecherry |
Prunus virginiana |
Bark of a choke cherry tree. |
| 5468153 |
willow |
Salix spp. |
Alternate arranged buds and terminal bud of a willow |
| 5468154 |
paper birch |
Betula papyrifera |
New growth and terminal bud of a white birch |
| 5468158 |
balsam poplar |
Populus balsamifera |
terminal bud of a balsam poplar |
| 5468099 |
paper birch |
Betula papyrifera |
White birch silhouette |
| 5468100 |
white ash |
Fraxinus americana |
White ash terminal bud and leaf scar |
| 5468102 |
northern red oak |
Quercus rubra |
terminal bud of a red oak |
| 5468110 |
pin cherry |
Prunus pensylvanica |
Terminal buds of a pin cherry |
| 5468111 |
quaking aspen |
Populus tremuloides |
Trembling aspen silhouette |
| 5468112 |
quaking aspen |
Populus tremuloides |
Bark of a trembling aspen |
| 5468115 |
mountain ash |
Sorbus spp. |
New growth and terminal bud of a Mountain Ash |
| 5468116 |
mountain ash |
Sorbus spp. |
|
| 5468118 |
speckled alder |
Alnus incana ssp. rugosa |
Bark of a speckled alder |
| 5468121 |
American elm |
Ulmus americana |
Bark of a mature white elm |
| 5468122 |
quaking aspen |
Populus tremuloides |
buds and twig of a trembling aspen |
| 5468123 |
American elm |
Ulmus americana |
terminal bud and twig of a white elm |
| 5468124 |
green ash |
Fraxinus pennsylvanica |
Bark of a Red ash |
| 5468125 |
green ash |
Fraxinus pennsylvanica |
New growth of a red ash |
| 5468129 |
black ash |
Fraxinus nigra |
Terminal bud of a black ash tree |
| 5468130 |
black ash |
Fraxinus nigra |
bark of a young black ash |
| 5468131 |
northern red oak |
Quercus rubra |
A red oak retaining its leaves over winter. |
| 5468132 |
northern red oak |
Quercus rubra |
Bark of a red oak |
| 5468083 |
yellow birch |
Betula alleghaniensis |
Bark of a mature Yellow birch |
| 5468084 |
yellow birch |
Betula alleghaniensis |
Twig of a Yellow birch |
| 5468134 |
paper birch |
Betula papyrifera |
Mature bark of a white birch |
| 5468136 |
Carolina poplar |
Populus x canadensis |
Carolina poplar silhouette's |
| 5468137 |
American elm |
Ulmus americana |
Silhouette of a white elm tree. |
| 5468138 |
Carolina poplar |
Populus x canadensis |
Bark of a carolina poplar |
| 5468139 |
Carolina poplar |
Populus x canadensis |
buds of a carolina poplar |
| 5468140 |
Carolina poplar |
Populus x canadensis |
twigs and and buds of a Carolina poplar |
| 5468156 |
balsam poplar |
Populus balsamifera |
young balsam poplar silhouette |
| 5468157 |
balsam poplar |
Populus balsamifera |
bark of a balsam poplar |
| 5468160 |
quaking aspen |
Populus tremuloides |
buds and twig of a trembling aspen |
| 5468535 |
crabapple and apple |
Malus spp. |
crabapple, Malus sp. |
| 5468534 |
crabapple and apple |
Malus spp. |
crabapple, Malus sp. |
| 5468546 |
pin cherry |
Prunus pensylvanica |
pin cherry, Prunus pensylvanica |
| 5468547 |
pin cherry |
Prunus pensylvanica |
pin cherry, Prunus pensylvanica |
| 5468774 |
black locust |
Robinia pseudoacacia |
black locust, Robinia pseudoacacia |
| 5468775 |
black locust |
Robinia pseudoacacia |
black locust, Robinia pseudoacacia |
| 5468545 |
willow |
Salix spp. |
willow, Salix spp. |
| 5468532 |
hawthorn |
Crataegus spp. |
hawthorn, Crataegus spp. |
| 5468533 |
hawthorn |
Crataegus spp. |
hawthorn, Crataegus spp. |
| 5468548 |
mountain ash |
Sorbus spp. |
mountain-ash, Sorbus spp. |
| 5468549 |
mountain ash |
Sorbus spp. |
mountain-ash, Sorbus spp. |
| 5468502 |
red maple |
Acer rubrum |
red maple, Acer rubrum |
| 5468503 |
red maple |
Acer rubrum |
red maple, Acer rubrum |
| 5468524 |
boxelder |
Acer negundo |
Manitoba maple, Acer negundo |
| 5468525 |
boxelder |
Acer negundo |
Manitoba maple, Acer negundo |
| 5468512 |
crabapple and apple |
Malus spp. |
apple, Malus spp. |
| 5468513 |
crabapple and apple |
Malus spp. |
apple, Malus spp. |
| 5468514 |
honeylocust |
Gleditsia triacanthos |
honey locust, Gleditsia triacanthos |
| 5468515 |
honeylocust |
Gleditsia triacanthos |
honey locust, Gleditsia triacanthos
thorn |
| 5468518 |
quaking aspen |
Populus tremuloides |
trembling aspen, Populus tremuloides |
| 5468519 |
quaking aspen |
Populus tremuloides |
trembling aspen, Populus tremuloides |
| 5468520 |
white poplar |
Populus alba |
european white poplar, Populus alba |
| 5468521 |
white poplar |
Populus alba |
european white poplar, Populus alba |
| 5468522 |
speckled alder |
Alnus incana ssp. rugosa |
speckled alder, Alnus incana subsp. rugosa |
| 5468523 |
speckled alder |
Alnus incana ssp. rugosa |
speckled alder, Alnus incana subsp. rugosa
catkin |
| 5468500 |
northern red oak |
Quercus rubra |
red oak, Quercus rubra |
| 5468501 |
northern red oak |
Quercus rubra |
red oak, Quercus rubra |
| 5468526 |
white ash |
Fraxinus americana |
white ash, Fraxinus americana |
| 5468527 |
white ash |
Fraxinus americana |
white ash, Fraxinus americana |
| 5468528 |
red pine |
Pinus resinosa |
red pine, Pinus resinosa |
| 5468504 |
paper birch |
Betula papyrifera |
white birch, Betula papyrifera |
| 5468505 |
paper birch |
Betula papyrifera |
white birch, Betula papyrifera |
| 5468506 |
American elm |
Ulmus americana |
white elm, Ulmus americana silhouette |
| 5468507 |
American elm |
Ulmus americana |
white elm, Ulmus americana |
| 5468544 |
willow |
Salix spp. |
willow, Salix spp. |
| 5461510 |
common chokecherry |
Prunus virginiana |
choke cherry (Prunus virginiana) leaf base showing characteristic glands (extra-floral nectaries) on petiole |
| 5461515 |
mountain maple |
Acer spicatum |
mountain maple (Acer spicatum) flower spike with developing samaras |
| 5444429 |
slashing and bucking |
|
hardwood slashing (mostly sugar maple) |
| 5444430 |
skidding |
|
dual-arch Tigercat grapple skidder; selective hardwood prescription; northern hardwood stand |
| 5445497 |
powdered sunshine lichen |
Vulpicida pinastri |
powdered sunshine lichen (Vulpicida pinastri) on bog birch (Betula pumila) |
| 5445496 |
powdered sunshine lichen |
Vulpicida pinastri |
powdered sunshine lichen (Vulpicida pinastri) on bog birch (Betula pumila) |
| 5461516 |
mountain maple |
Acer spicatum |
mountain maple (Acer spicatum) flower spikes |
| 5461514 |
Norway maple |
Acer platanoides |
Norway maple (Acer platanoides) leaf petiole base oozing characteristic milky sap |
| 5461501 |
sugar maple |
Acer saccharum |
sugar maple (Acer saccharum) sapling showing transition of previous to current year's growth |
| 5465776 |
speckled alder |
Alnus incana ssp. rugosa |
speckled alder (Alnus incana subsp. rugosa) winter twig showing characteristic stalked vegetative buds and preformed male and female flowers (catkins) extending from the twig tip |
| 5461547 |
mountain maple |
Acer spicatum |
mountain maple (Acer spicatum) winter twig |
| 5461548 |
mountain maple |
Acer spicatum |
mountain maple (Acer spicatum) |
| 5461502 |
common chokecherry |
Prunus virginiana |
choke cherry (Prunus virginiana) winter twig |
| 5461503 |
common chokecherry |
Prunus virginiana |
choke cherry (Prunus virginiana) winter twig |
| 5461504 |
common chokecherry |
Prunus virginiana |
choke cherry (Prunus virginiana) winter twig |
| 5461499 |
sugar maple |
Acer saccharum |
sugar maple (Acer saccharum) winter twig |
| 5461500 |
sugar maple |
Acer saccharum |
sugar maple (Acer saccharum) winter twig showing a lateral bud and leaf scar |
| 5461507 |
Norway maple |
Acer platanoides |
Norway maple (Acer platanoides) leaf; note bristle-tipped lobes |
| 5461549 |
mountain maple |
Acer spicatum |
mountain maple (Acer spicatum) |
| 5461550 |
sugar maple |
Acer saccharum |
sugar maple (Acer saccharum) winter twig |
| 5461551 |
red maple |
Acer rubrum |
red maple (Acer rubrum) winter twig |
| 5461553 |
striped maple |
Acer pensylvanicum |
striped maple (Acer pensylvanicum) |
| 5461511 |
silver maple |
Acer saccharinum |
mature silver maple (Acer saccharinum) samaras |
| 5461512 |
silver maple |
Acer saccharinum |
silver maple (Acer saccharinum) |
| 5461513 |
common chokecherry |
Prunus virginiana |
choke cherry (Prunus virginiana) |
| 5461506 |
pin cherry |
Prunus pensylvanica |
pin cherry leaf (Prunus pensylvanica) |
| 5461508 |
mountain maple |
Acer spicatum |
emerging mountain maple (Acer spicatum) leaves |
| 5461509 |
boxelder |
Acer negundo |
recently emerged Manitoba maple (Acer negundo) leaves |
| 5461517 |
yellow birch |
Betula alleghaniensis |
yellow birch (Betula alleghaniensis) |
| 5461554 |
sugar maple |
Acer saccharum |
mature sugar maple (Acer saccharum) |
| 5461552 |
pin cherry |
Prunus pensylvanica |
young pin cherry (Prunus pensylvanica) |
| 5461518 |
yellow birch |
Betula alleghaniensis |
yellow birch (Betula alleghaniensis); note straight veins |
| 5461519 |
striped maple |
Acer pensylvanicum |
striped maple (Acer pensylvanicum) |
| 5461520 |
yellow birch |
Betula alleghaniensis |
yellow birch (Betula alleghaniensis) |
| 5459331 |
beaked hazelnut |
Corylus cornuta |
beaked hazel winter buds (Corylus cornuta) |
| 5459332 |
quaking aspen |
Populus tremuloides |
trembling apsen (Populus tremuloides) winter twig showing vegetative buds (smaller buds) and flower buds (larger buds) |
| 5459330 |
mountain maple |
Acer spicatum |
characteristic mountain maple (Acer spicatum) bark pattern |
| 5458750 |
bigtooth aspen |
Populus grandidentata |
upper bole of mature largetooth aspen (Populus grandidentata) showing characteristic orange cast |
| 5458751 |
bigtooth aspen |
Populus grandidentata |
upper bole of mature largetooth aspen (Populus grandidentata) showing characteristic orange cast |
| 5458752 |
bigtooth aspen |
Populus grandidentata |
lower bole of mature largetooth aspen (Populus grandidentata) showing characteristic deeply fissured bark with orange tinge in cracks |
| 5458907 |
balsam poplar |
Populus balsamifera |
balsam poplar (Populus balsamifera) current annual growth winter twig |
| 5458908 |
balsam poplar |
Populus balsamifera |
balsam poplar (Populus balsamifera) current annual growth winter twig |
| 5455689 |
pin cherry |
Prunus pensylvanica |
pin cherry sapling (Prunus pensylvanica) |
| 5455690 |
pin cherry |
Prunus pensylvanica |
mature pin cherry (Prunus pensylvanica) |
| 5455691 |
pin cherry |
Prunus pensylvanica |
pin cherry sapling (Prunus pensylvanica) |
| 5455692 |
common chokecherry |
Prunus virginiana |
"pre-ripened" chokecherry fruit (Prunus virginiana); mid-August |
| 5455693 |
common chokecherry |
Prunus virginiana |
chokecherry (Prunus virginiana) flowers; early June |
| 5455694 |
black cherry |
Prunus serotina |
black cherry flowers (Prunus serotina); mid-June |
| 1249004 |
emerald ash borer |
Agrilus planipennis |
bark crack on 10-year old sapling |
| 1382002 |
red-humped oakworm moth |
Symmerista canicosta |
defoliation at Kasshabog Lake, Bancroft District, Ontario in summer 2004 |
| 5454116 |
hophornbeam |
Ostrya virginiana |
ironwood (Ostrya virginiana) winter twig - note zig-zag twig and divergent lateral buds (45 degrees) |
| 5454111 |
paper birch |
Betula papyrifera |
white birch (Betula papyrifera) |
| 5454163 |
Carolina poplar |
Populus x canadensis |
Carolina poplar (Populus xcanadensis) showing distinctive vegetative buds (will produce leaves) |
| 5454164 |
Carolina poplar |
Populus x canadensis |
Carolina poplar (Populus xcanadensis) showing distinctive reproductive buds (will produce catkins) |
| 5454165 |
Carolina poplar |
Populus x canadensis |
Carolina poplar (Populus xcanadensis) showing distinctive reproductive buds (will produce catkins) |
| 5454851 |
speckled alder |
Alnus incana ssp. rugosa |
speckled alder (Alnus incana subsp. rugosa) preformed male and female catkins and spent female catkins (January) |
| 5454852 |
speckled alder |
Alnus incana ssp. rugosa |
speckled alder (Alnus incana subsp. rugosa) preformed male catkins (the long structures) and preformed female catkins (small structures above male catkins); January |
| 5454853 |
green ash |
Fraxinus pennsylvanica |
red ash (Fraxinus pennsylvanica) winter twig |
| 5454854 |
green ash |
Fraxinus pennsylvanica |
mature red ash (Fraxinus pennsylvanica); mature bark difficult to tell apart from white ash - key was being able to look at current-year twig |
| 5454855 |
silver maple |
Acer saccharinum |
silver maple (Acer saccharinum) winter twig |
| 5455092 |
wych elm |
Ulmus glabra |
mature wych elm (Ulmus glabra) |
| 5454133 |
American basswood |
Tilia americana |
basswood (Tilia americana) winter twig and fruit (bract with nutlets) |
| 5454110 |
black ash |
Fraxinus nigra |
black ash (Fraxinus nigra) - note gap between terminal bud and first set of lateral buds (white ash lateral buds are tight) - also note lateral bud placement above the leaf scar (white ash lateral bud sits in a notch) |
| 5454059 |
black walnut |
Juglans nigra |
black walnut winter twig (Juglans nigra) |
| 5445620 |
elm spanworm |
Ennomos subsignaria |
defoliation |
| 5445621 |
elm spanworm |
Ennomos subsignaria |
|
| 5445627 |
elm spanworm |
Ennomos subsignaria |
|
| 5454474 |
Norway maple |
Acer platanoides |
mature Norway maple (Acer platanoides) |
| 5454124 |
hedge maple |
Acer campestre |
hedge maple (Acer campestre) winter twig and strongly divergent double samara fruit. |
| 5454197 |
mountain maple |
Acer spicatum |
mountain maple (Acer spicatum) winter twig |
| 5454169 |
mountain maple |
Acer spicatum |
mountain maple (Acer spicatum) winter twig and remnant fruits (double samaras) |
| 5454170 |
beaked hazelnut |
Corylus cornuta |
male catkins on beaked hazel (Corylus cornuta) winter twig |
| 5454181 |
boxelder |
Acer negundo |
Manitoba maple/boxelder (Acer negundo) characteristic remnant fruit (double samaras) on a female tree |
| 5454183 |
hawthorn |
Crataegus spp. |
hawthorn remnant fruit (Crataegus sp.); December |
| 5454185 |
boxelder |
Acer negundo |
Manitoba maple/boxelder (Acer negundo) winter twig |
| 5454193 |
red maple |
Acer rubrum |
red maple (Acer rubrum) winter twig with flower buds |
| 5454195 |
hophornbeam |
Ostrya virginiana |
ironwood (Ostrya virginiana) winter twig; note divergent lateral buds |
| 5454196 |
hophornbeam |
Ostrya virginiana |
ironwood (Ostrya virginiana) winter twig; note divergent lateral buds |
| 5454117 |
hophornbeam |
Ostrya virginiana |
mature ironwood (Ostrya virginiana) |
| 5454118 |
hophornbeam |
Ostrya virginiana |
young ironwood (Ostrya virginiana) |
| 5454119 |
paper birch |
Betula papyrifera |
white birch (Betula papyrifera) winter twig - note white resin dots along twig tip (like a salted pretzel) and lateral buds placed tight to the stem |
| 5454115 |
paper birch |
Betula papyrifera |
white birch (Betula papyrifera) winter twig - note white resin dots along twig tip (like a salted pretzel) and lateral buds placed tight to the stem |
| 5454137 |
Norway maple |
Acer platanoides |
Norway maple winter twig (Acer platanoides) |
| 5454134 |
green ash |
Fraxinus pennsylvanica |
red ash winter twig (Fraxinus pennsylvanica) - current annual growth pubescent |
| 5454122 |
American basswood |
Tilia americana |
mature basswood (Tilia americana) with sucker growth around stump |
| 5454123 |
hedge maple |
Acer campestre |
hedge maple (Acer campestre) winter twig |
| 5454126 |
honeylocust |
Gleditsia triacanthos |
characteristic developing thorn of honey locust (Gleditsia triacanthos) |
| 5454129 |
boxelder |
Acer negundo |
Manitoba maple (Acer negundo) - typical poor form |
| 5454130 |
boxelder |
Acer negundo |
Manitoba maple (Acer negundo) - typical poor form |
| 5454047 |
white oak |
Quercus alba |
white oak winter twig (Quercus alba) (introduced to private woodlot) |
| 5454048 |
white oak |
Quercus alba |
white oak winter twig (Quercus alba) (introduced to private woodlot) |
| 5454049 |
northern red oak |
Quercus rubra |
northern red oak winter twig (Quercus rubra) |
| 5454108 |
striped maple |
Acer pensylvanicum |
hardwood understory striped maple (Acer pensylvanicum) winter twig; bud scale scars (series of 3 lines) indicate each year of growth |
| 5454109 |
black ash |
Fraxinus nigra |
black ash (Fraxinus nigra) - note gap between terminal bud and first set of lateral buds (white ash lateral buds are tight) - also note lateral bud placement above the leaf scar (white ash lateral bud sits in a notch) |
| 5454057 |
butternut |
Juglans cinerea |
butternut winter twig (Juglans cinerea); tree was recorded in Ontario's NHIC rare plant database |
| 5454132 |
bur oak |
Quercus macrocarpa |
bur oak (Quercus macrocarpa) |
| 5454198 |
striped maple |
Acer pensylvanicum |
striped maple (Acer pensylvanicum) winter twig |
| 5454168 |
mountain maple |
Acer spicatum |
mountain maple (Acer spicatum) winter twig |
| 5454192 |
sugar maple |
Acer saccharum |
sugar maple (Acer saccharum) |
| 5454199 |
striped maple |
Acer pensylvanicum |
striped maple (Acer pensylvanicum) winter twig |
| 5454200 |
northern red oak |
Quercus rubra |
mature northern red oak (Quercus rubra) |
| 5454162 |
Carolina poplar |
Populus x canadensis |
mature Carolina poplar (Populus xcanadensis) |
| 5454058 |
butternut |
Juglans cinerea |
butternut (Juglans cinerea); tree was recorded in Ontario's NHIC rare plant database |
| 5454050 |
northern red oak |
Quercus rubra |
northern red oak winter twig (Quercus rubra) |
| 5454055 |
butternut |
Juglans cinerea |
butternut winter twig (Juglans cinerea); tree was recorded in Ontario's NHIC rare plant database |
| 5454135 |
green ash |
Fraxinus pennsylvanica |
red ash winter twig (Fraxinus pennsylvanica) - current annual growth pubescent |
| 5454136 |
green ash |
Fraxinus pennsylvanica |
red ash winter twig (Fraxinus pennsylvanica) - current annual growth pubescent |
| 5445991 |
Japanese beetle |
Popillia japonica |
Japanese beetles (Popillia japonica) on elm leaf (Ulmus spp.) |
| 5445639 |
blue ash |
Fraxinus quadrangulata |
blue ash (Fraxinus quadrangulata) leaf rachis and leaflets |
| 5445636 |
blue ash |
Fraxinus quadrangulata |
blue ash (Fraxinus quadrangulata) |
| 5445838 |
white ash |
Fraxinus americana |
white ash winter twig (Fraxinus americana) |
| 5445839 |
white ash |
Fraxinus americana |
white ash samaras(Fraxinus americana) |
| 5445840 |
white ash |
Fraxinus americana |
white ash winter twig (Fraxinus americana) |
| 5445844 |
American beech |
Fagus grandifolia |
American beech winter twig (Fagus grandifolia) |
| 5445856 |
wych elm |
Ulmus glabra |
wych elm (Ulmus glabra) winter twig |
| 5445857 |
wych elm |
Ulmus glabra |
wych elm (Ulmus glabra) twig showing characteristic short petiole |
| 5445649 |
yellow buckeye |
Aesculus flava |
yellow buckeye (Aesculus flava) |
| 5445845 |
American beech |
Fagus grandifolia |
American beech (Fagus grandifolia) fruit (a nut) and foliage |
| 5445846 |
American beech |
Fagus grandifolia |
American beech (Fagus grandifolia) |
| 5445641 |
black locust |
Robinia pseudoacacia |
black locust (Robinia pseudoacacia) |
| 5445858 |
wych elm |
Ulmus glabra |
wych elm (Ulmus glabra) twig showing characteristic short petiole |
| 5445859 |
wych elm |
Ulmus glabra |
wych elm (Ulmus glabra) showing characteristic "ear-like" teeth on upper portion of leaf |
| 5445788 |
American sycamore |
Platanus occidentalis |
sycamore (Platanus occidentalis) |
| 5445789 |
American sycamore |
Platanus occidentalis |
sycamore (Platanus occidentalis) |
| 5445790 |
American sycamore |
Platanus occidentalis |
underside of sycamore (Platanus occidentalis) leaf |
| 5445791 |
American sycamore |
Platanus occidentalis |
sycamore (Platanus occidentalis) fruiting structure (diagnostic single ball) |
| 5445792 |
American sycamore |
Platanus occidentalis |
sycamore (Platanus occidentalis) branch |
| 5445652 |
Ohio buckeye |
Aesculus glabra |
Ohio Buckeye (Aesculus glabra) |
| 5445648 |
common hackberry |
Celtis occidentalis |
Northern Hackberry (Celtis occidentalis) |
| 5445511 |
beaked hazelnut |
Corylus cornuta |
beaked hazel (Corylus cornuta) |
| 5444931 |
chinkapin oak |
Quercus muehlenbergii |
chinkuapin oak, Quercus muehlenbergii (note swollen acorn cap scales) |
| 5444932 |
shingle oak |
Quercus imbricaria |
Shingle Oak, Quercus imbricaria |
| 5444935 |
clinker polypore |
Inonotus obliquus |
sterile black conk of Inonotus obliquus (clinker, Siberian chaga) fungus on live Betula alleghaniensis (yellow birch) |
| 5444936 |
clinker polypore |
Inonotus obliquus |
sterile black conk of Inonotus obliquus (clinker, Siberian chaga) fungus on live Betula alleghaniensis (yellow birch) |
| 5444937 |
clinker polypore |
Inonotus obliquus |
sterile black conk of Inonotus obliquus (clinker, Siberian chaga) fungus on live Betula alleghaniensis (yellow birch) |
| 5444940 |
cherry birch |
Betula lenta |
Betula lenta (sweet birch, cherry birch), September 1 (2011) |
| 5444941 |
cherry birch |
Betula lenta |
Betula lenta (sweet birch, cherry birch) |
| 5444942 |
cherry birch |
Betula lenta |
Betula lenta (sweet birch, cherry birch) |
| 5444943 |
cherry birch |
Betula lenta |
Betula lenta (sweet birch, cherry birch) |
| 5444924 |
yellow birch |
Betula alleghaniensis |
yellow birch (Betula alleghaniensis) |
| 5444925 |
yellow birch |
Betula alleghaniensis |
yellow birch (Betula alleghaniensis) |
| 5444930 |
chinkapin oak |
Quercus muehlenbergii |
chinkuapin oak, Quercus muehlenbergii |
| 5444938 |
clinker polypore |
Inonotus obliquus |
sterile black conk of Inonotus obliquus (clinker, Siberian chaga) fungus on live Betula papyrifera (white birch) |
| 5444939 |
clinker polypore |
Inonotus obliquus |
sterile black conk of Inonotus obliquus (clinker, Siberian chaga) fungus on live Betula alleghaniensis (yellow birch) |
| 5444870 |
eastern cottonwood |
Populus deltoides ssp. deltoides |
eastern cottonwood (Populus deltoides subsp. deltoides) showing characteristic multiple glandular structures where petiole meets leaf base |
| 5444871 |
wych elm |
Ulmus glabra |
wych elm (Ulmus glabra); June 6 |
| 5443323 |
American elm |
Ulmus americana |
American (white) elm developing samaras |
| 5444752 |
black ash |
Fraxinus nigra |
young black ash (Fraxinus nigra) tree showing characteristic corky bark |
| 5444764 |
black ash |
Fraxinus nigra |
mature black ash (Fraxinus nigra) showing characteristic scaly bark |
| 5444371 |
Canadian plum |
Prunus nigra |
Canada plum (Prunus nigra) typical leaf and ripening fruit |
| 5444763 |
black ash |
Fraxinus nigra |
black ash (Fraxinus nigra) showing opposite leaf arrangement and characteristic gap between terminal bud and first set of leaves and axillary buds |
| 5444742 |
striped maple |
Acer pensylvanicum |
striped maple (Acer pensylvanicum), May 29 |
| 5444743 |
striped maple |
Acer pensylvanicum |
striped maple (Acer pensylvanicum), May 29 |
| 5444744 |
striped maple |
Acer pensylvanicum |
striped maple (Acer pensylvanicum), May 29 |
| 5444372 |
Canadian plum |
Prunus nigra |
Canada plum (Prunus nigra); May 22 |
| 5444373 |
Canadian plum |
Prunus nigra |
Canada Plum (Prunus nigra); May 22 |
| 5444293 |
white ash |
Fraxinus americana |
White ash germination. Seed was removed from samara then seed coat was removed. Seed was cold stratified for ca. 90 days only - germination occurred within 7 days in petri dish. |
| 5444369 |
mountain alder |
Alnus viridis ssp. crispa |
green alder (Alnus viridis subsp. crispa); mid-May; receptive female catkins on long, erect stalks; male 'pollen' catkins hanging; last years female catkins in foreground |
| 5444370 |
mountain alder |
Alnus viridis ssp. crispa |
green alder (Alnus viridis subsp. crispa) |
| 5443336 |
black maple |
Acer saccharum ssp. nigrum |
black maple (Acer saccharum subsp. nigrum) |
| 5443320 |
northern red oak |
Quercus rubra |
northern red oak (Quercus rubra) radicle penetrating leaf litter (May 12) |
| 5443324 |
wych elm |
Ulmus glabra |
wych elm (Ulmus glabra) developing samaras |
| 5443325 |
wych elm |
Ulmus glabra |
wych elm (Ulmus glabra) developing samaras |
| 5443583 |
witch-hazel |
Hamamelis virginiana |
witch-hazel (Hamamelis virginiana) fruit and autumn flower buds (early September) |
| 5443141 |
laurel sphinx |
Sphinx kalmiae |
laurel sphinx, Sphinx kalmiae, on white ash, Fraxinus americana, sapling |
| 5443499 |
yellow birch |
Betula alleghaniensis |
yellow birch regeneration (Betula alleghaniensis) on remnant stump |
| 5443580 |
slippery elm |
Ulmus rubra |
slippery elm (Ulmus rubra) - twig very rough |
| 5443579 |
slippery elm |
Ulmus rubra |
slippery elm (Ulmus rubra) - note the branching of the veins and obovate shape - leaf surface was very rough |
| 5443577 |
rock elm |
Ulmus thomasii |
rock elm (Ulmus thomasii) |
| 5443578 |
rock elm |
Ulmus thomasii |
rock elm (Ulmus thomasii) - note the lack of branching on the veins and the large number of veins "packed" in |
| 5443501 |
paper birch |
Betula papyrifera |
white birch regeneration (Betula papyrifera) on remnant log |
| 5443500 |
yellow birch |
Betula alleghaniensis |
yellow birch regeneration (Betula alleghaniensis) on remnant log |
| 5443502 |
yellow birch |
Betula alleghaniensis |
yellow birch regeneration (Betula alleghaniensis) on remnant stump |
| 5443503 |
yellow birch |
Betula alleghaniensis |
mature yellow birch (Betula alleghaniensis) on side hill |
| 5443335 |
black cherry |
Prunus serotina |
black cherry (Prunus serotina) leaf underside (June 30) |
| 5443321 |
American elm |
Ulmus americana |
American elm (Ulmus americana) flowers (May 12) |
| 5443322 |
green ash |
Fraxinus pennsylvanica |
red ash (Fraxinus pennsylvanca) female flowers |
| 3056087 |
cottonwood crown borer |
Sesia tibialis |
Indianhead. Sas., Canada |
| 1193010 |
Asian longhorned beetle |
Anoplophora glabripennis |
female chewing an oviposition site on red oak |
| 1193004 |
Asian longhorned beetle |
Anoplophora glabripennis |
oviposition site on red oak |
| 1193005 |
Asian longhorned beetle |
Anoplophora glabripennis |
oviposition site and adult feeding damage on sugar maple |
| 1193001 |
Asian longhorned beetle |
Anoplophora glabripennis |
female ovipositing in sugar maple |
| 1193002 |
Asian longhorned beetle |
Anoplophora glabripennis |
oviposition site on a small red maple |
| 1249005 |
emerald ash borer |
Agrilus planipennis |
stem discoloration and bark crack on 10-year old sapling |
| 1439004 |
emerald ash borer |
Agrilus planipennis |
damage to red ash stand |
| 1439009 |
emerald ash borer |
Agrilus planipennis |
opened bark to expose galleries |
| 1439008 |
emerald ash borer |
Agrilus planipennis |
new exit hole |
| 1439007 |
emerald ash borer |
Agrilus planipennis |
larval tunnels |
| 1249001 |
emerald ash borer |
Agrilus planipennis |
crown thinning |
| 1439005 |
emerald ash borer |
Agrilus planipennis |
|
| 1439006 |
emerald ash borer |
Agrilus planipennis |
|
| 1249002 |
emerald ash borer |
Agrilus planipennis |
larval galleries and exit holes on 10-year old sapling |
| 1249006 |
emerald ash borer |
Agrilus planipennis |
exposed larval galleries of current year attack to 10-year old sapling |
| 0177092 |
large aspen tortrix |
Choristoneura conflictana |
|
| 1382001 |
red-humped oakworm moth |
Symmerista canicosta |
summer 2004 |
| 1382003 |
red-humped oakworm moth |
Symmerista canicosta |
defoliation at Kasshabog Lake, Bancroft District, Ontario in summer 2004 |
| 1249003 |
emerald ash borer |
Agrilus planipennis |
infested firewood |
| 1193006 |
Asian longhorned beetle |
Anoplophora glabripennis |
adult feeding damage (foliage wilted due to girdling of twigs) |
| 1193007 |
Asian longhorned beetle |
Anoplophora glabripennis |
adult male marked for study |
| 1193008 |
Asian longhorned beetle |
Anoplophora glabripennis |
male/female pair |
| 1193009 |
Asian longhorned beetle |
Anoplophora glabripennis |
male guarding female during oviposition |
| 1193003 |
Asian longhorned beetle |
Anoplophora glabripennis |
adult feeding damage (stripped bark) |
| 3056086 |
cottonwood crown borer |
Sesia tibialis |
Indianhead, Sas., |
| 1439003 |
emerald ash borer |
Agrilus planipennis |
note epicormic branches being formed as crown dies back |
| 1450008 |
thinning (stand) |
|
5 m wide machine corrdior 2 years post-harvest, EMEND Project, NW Alberta, Canada |
| 1450009 |
thinning (stand) |
|
5 m wide machine corrdior 2 years post-harvest, Ecosystem Management Emulating Natural Disturbance Project, Northwestern Alberta, Canada |
