| 5476357 |
Callery pear (Bradford pear) |
Pyrus calleryana |
thorn |
| 5438685 |
cattail millet |
Setaria glauca |
branch collar |
| 5438686 |
cattail millet |
Setaria glauca |
Branch collar and ligule |
| 5438687 |
cattail millet |
Setaria glauca |
ligule |
| 5437167 |
longspine sandbur |
Cenchrus longispinus |
|
| 5437175 |
longspine sandbur |
Cenchrus longispinus |
|
| 5437236 |
goosegrass |
Eleusine indica |
|
| 5438706 |
yellow nutsedge |
Cyperus esculentus |
leaf collar |
| 5437531 |
sorghum-almum |
Sorghum almum |
ligule |
| 5437199 |
giant foxtail |
Setaria faberi |
leaf collar, ligule and leaf shealth |
| 5437238 |
goosegrass |
Eleusine indica |
ligule, leaf collar |
| 5437055 |
cheatgrass |
Bromus tectorum |
leaf collar, leaf shealth and ligule |
| 5436719 |
burcucumber |
Sicyos angulatus |
|
| 5436523 |
annual bluegrass |
Poa annua |
Magnified ligule |
| 5438030 |
reed |
Phragmites spp. |
ligule |
| 5438342 |
sorghum |
Sorghum bicolor |
ligule |
| 5437200 |
giant foxtail |
Setaria faberi |
ligule |
| 5437240 |
goosegrass |
Eleusine indica |
ligule |
| 5437107 |
fall panicum |
Panicum dichotomiflorum |
ligule |
| 5437106 |
fall panicum |
Panicum dichotomiflorum |
ligule |
| 5437056 |
cheatgrass |
Bromus tectorum |
ligule |
| 5437105 |
fall panicum |
Panicum dichotomiflorum |
ligule |
| 1561184 |
Allegheny mound ant |
Formica exsectoides |
photo taken 3 August 1994 |
| 1561185 |
Allegheny mound ant |
Formica exsectoides |
photo taken 23 August 1994 |
| 1561186 |
Allegheny mound ant |
Formica exsectoides |
mound; photo taken 23 August 1994 |
| 1561187 |
Allegheny mound ant |
Formica exsectoides |
mound; photo taken 23 August 1994 |
| 1561188 |
Allegheny mound ant |
Formica exsectoides |
mound; photo taken 23 August 1994 |
| 1550199 |
swamp smartweed |
Persicaria hydropiperoides |
|
| 1554241 |
smooth brome |
Bromus inermis |
leaf sheath |
| 1554017 |
Jerusalem artichoke |
Helianthus tuberosus |
leaf attachment |
| 1561093 |
eastern tent caterpillar |
Malacosoma americanum |
photo taken on 12 May 1993 |
| 1551074 |
johnsongrass |
Sorghum halepense |
|
| 1550060 |
nimblewill |
Muhlenbergia schreberi |
|
| 1551156 |
red sorrel |
Rumex acetosella |
infructescence |
| 1551007 |
smooth brome |
Bromus inermis |
swollen nodes |
| 1560189 |
Virginia-creeper |
Parthenocissus quinquefolia |
adhesive disks |
| 1560185 |
Virginia-creeper |
Parthenocissus quinquefolia |
tendrils |
| 1560178 |
Virginia-creeper |
Parthenocissus quinquefolia |
immature |
| 1560160 |
white vervain |
Verbena urticifolia |
inflorescence |
| 1560139 |
trumpetcreeper |
Campsis radicans |
base of petioles |
| 1560112 |
tree-of-heaven |
Ailanthus altissima |
leaf scar |
| 1560109 |
tree-of-heaven |
Ailanthus altissima |
leaf scars |
| 1560110 |
tree-of-heaven |
Ailanthus altissima |
leaf scar |
| 1560080 |
timothy |
Phleum pratense |
ligule |
| 1560077 |
timothy |
Phleum pratense |
|
| 1560006 |
common teasel |
Dipsacus fullonum |
seed head |
| 1551134 |
blackseed plantain |
Plantago rugelii |
base of plant |
| 1551083 |
prickly lettuce |
Lactuca serriola |
underside of leaf |
| 1551062 |
horsenettle |
Solanum carolinense |
petioles |
| 1550143 |
white mulberry |
Morus alba |
branch |
| 1550135 |
wild garlic |
Allium vineale |
flowers and fruits |
| 1550134 |
wild garlic |
Allium vineale |
bulblets |
| 1550128 |
wild garlic |
Allium vineale |
bulbs |
| 1556156 |
wild garlic |
Allium vineale |
bulb |
| 1550118 |
tawny daylily |
Hemerocallis fulva |
base of plant |
| 1550116 |
asparagus |
Asparagus officinalis |
fruits and seeds |
| 1550108 |
slender rush |
Juncus tenuis |
base of plant and roots |
| 1550053 |
johnsongrass |
Sorghum halepense |
leaf attachment |
| 1550043 |
tall fescue |
Festuca arundinacea |
leaf attachment |
| 1559406 |
witchgrass |
Panicum capillare |
|
| 1559311 |
smooth sumac |
Rhus glabra |
fruit and stem |
| 1559301 |
common St. Johnswort |
Hypericum perforatum |
pellucid dots |
| 1559299 |
common St. Johnswort |
Hypericum perforatum |
pellucid dots |
| 1559232 |
water knotweed |
Polygonum amphibium |
|
| 1559224 |
water knotweed |
Polygonum amphibium |
thumbprint without stipule |
| 1559223 |
water knotweed |
Polygonum amphibium |
without stipule |
| 1559222 |
water knotweed |
Polygonum amphibium |
stipule |
| 1559219 |
water knotweed |
Polygonum amphibium |
stipule |
| 1559220 |
water knotweed |
Polygonum amphibium |
stipule |
| 1559155 |
western salsify |
Tragopogon dubius |
pappus |
| 1559128 |
slender rush |
Juncus tenuis |
|
| 1559107 |
multiflora rose |
Rosa multiflora |
stipules |
| 1559091 |
common reed |
Phragmites australis |
rhizome with new plants |
| 1559089 |
common reed |
Phragmites australis |
leaf sheath |
| 1559081 |
common reed |
Phragmites australis |
leaf sheath |
| 1559076 |
common reed |
Phragmites australis |
leaf attachment |
| 1559074 |
common reed |
Phragmites australis |
leaf sheath |
| 1559073 |
common reed |
Phragmites australis |
leaf sheath and ligule |
| 1559069 |
common reed |
Phragmites australis |
ligule |
| 1559038 |
quackgrass |
Elymus repens |
|
| 1559037 |
quackgrass |
Elymus repens |
rhizome and new shoot |
| 1559035 |
quackgrass |
Elymus repens |
leaf sheath |
| 1559032 |
quackgrass |
Elymus repens |
leaf sheath |
| 1557408 |
wirestem muhly |
Muhlenbergia frondosa |
|
| 1557398 |
wirestem muhly |
Muhlenbergia frondosa |
|
| 1557256 |
common milkweed |
Asclepias syriaca |
venation and hairs on lower leaf surface. |
| 1557255 |
common milkweed |
Asclepias syriaca |
underside of leaf. |
| 1557136 |
black locust |
Robinia pseudoacacia |
thorns at the base of leaves. |
| 1557134 |
black locust |
Robinia pseudoacacia |
thorn at the base of leaf |
| 1559018 |
quackgrass |
Elymus repens |
leaf attachment |
| 1559007 |
quackgrass |
Elymus repens |
leaf attachment and leaf sheath |
| 1552123 |
boxelder |
Acer negundo |
leaf attachment |
| 1558240 |
poison-hemlock |
Conium maculatum |
newly developing leaves. |
| 1558199 |
broadleaf plantain |
Plantago major |
venation |
| 1558120 |
orchardgrass |
Dactylis glomerata |
ligule |
| 1558116 |
orchardgrass |
Dactylis glomerata |
leaf sheath and ligule |
| 1558112 |
orchardgrass |
Dactylis glomerata |
|
| 1558109 |
orchardgrass |
Dactylis glomerata |
base of plant and roots |
| 1558102 |
wild onion |
Allium canadense |
base of plant and roots |
| 1556501 |
johnsongrass |
Sorghum halepense |
|
| 1556507 |
johnsongrass |
Sorghum halepense |
single white stripe on mid-rib of leaf |
| 1556500 |
johnsongrass |
Sorghum halepense |
leaf axil and single white stripe along mid-rib of leaf |
| 1556483 |
johnsongrass |
Sorghum halepense |
single white stripe along mid-rib of leaf |
| 1556481 |
johnsongrass |
Sorghum halepense |
ligule |
| 1556427 |
ground ivy |
Glechoma hederacea |
hairs on stem at leaf axil |
| 1556377 |
field horsetail |
Equisetum arvense |
close-up of where leaves join the stem |
| 1556271 |
hawkweeds |
Hieracium spp. |
roots and flower |
| 1556270 |
hawkweeds |
Hieracium spp. |
roots and flower |
| 1556058 |
tall fescue |
Festuca arundinacea |
|
| 1555181 |
chicory |
Cichorium intybus |
|
| 1555047 |
reed canarygrass |
Phalaris arundinacea |
leaf sheath and ligule |
| 1555045 |
reed canarygrass |
Phalaris arundinacea |
ligule |
| 1553222 |
prickly lettuce |
Lactuca serriola |
|
| 1553214 |
spotted knapweed |
Centaurea stoebe ssp. micranthos |
seed head |
| 1553209 |
spotted joe pye weed |
Eupatoriadelphus maculatus |
leaf axils |
| 1553202 |
hawkweeds |
Hieracium spp. |
leaves and flower |
| 1553176 |
dandelion |
Taraxacum spp. |
seed head |
| 1553142 |
common burdock |
Arctium minus |
seed head |
| 1552298 |
bigroot morningglory |
Ipomoea pandurata |
reproductive structures |
| 1552294 |
Japanese bindweed |
Calystegia hederacea |
flowers, roots, and foliage |
| 1552157 |
Virginia-creeper |
Parthenocissus quinquefolia |
|
| 1554300 |
common burdock |
Arctium minus |
seed heads |
| 1554299 |
common burdock |
Arctium minus |
seed heads |
| 1554288 |
common burdock |
Arctium minus |
capitula |
| 1554256 |
broomsedge bluestem |
Andropogon virginicus |
base of plant |
| 1554257 |
broomsedge bluestem |
Andropogon virginicus |
leaf sheath |
| 1554255 |
broomsedge bluestem |
Andropogon virginicus |
base of plant |
| 1554244 |
smooth brome |
Bromus inermis |
leaf sheath |
| 1554100 |
field bindweed |
Convolvulus arvensis |
cotyledons |
| 1554077 |
smooth bedstraw |
Galium mollugo |
in flower |
| 1554075 |
smooth bedstraw |
Galium mollugo |
square stem |
| 1554047 |
white heath aster |
Symphyotrichum ericoides var. ericoides |
capitulum |
| 1554020 |
Jerusalem artichoke |
Helianthus tuberosus |
leaf margin |
| 1554012 |
Jerusalem artichoke |
Helianthus tuberosus |
|
| 1551195 |
birdsfoot trefoil |
Lotus corniculatus |
|
| 1551191 |
tree-of-heaven |
Ailanthus altissima |
leaf scar |
| 1551186 |
Canada thistle |
Cirsium arvense |
|
| 1551179 |
bull thistle |
Cirsium vulgare |
seed head |
| 1551177 |
bull thistle |
Cirsium vulgare |
leaf apex |
| 1551175 |
common teasel |
Dipsacus fullonum |
|
| 1551164 |
perennial sowthistle |
Sonchus arvensis |
leaf margin |
| 1551154 |
red sorrel |
Rumex acetosella |
|
| 1551042 |
tall fescue |
Festuca arundinacea |
|
| 1551030 |
curly dock |
Rumex crispus |
|
| 1551025 |
oxeye daisy |
Leucanthemum vulgare |
|
| 1551016 |
chicory |
Cichorium intybus |
|
| 1551013 |
reed canarygrass |
Phalaris arundinacea |
|
| 1550200 |
swamp smartweed |
Persicaria hydropiperoides |
|
| 1550198 |
swamp smartweed |
Persicaria hydropiperoides |
ocrea |
| 1550196 |
swamp smartweed |
Persicaria hydropiperoides |
|
| 1550159 |
broadleaf dock |
Rumex obtusifolius |
|
| 1550103 |
yellow nutsedge |
Cyperus esculentus |
|
| 1550098 |
yellow nutsedge |
Cyperus esculentus |
Tubers |
| 1550096 |
yellow nutsedge |
Cyperus esculentus |
|
| 1550089 |
timothy |
Phleum pratense |
|
| 1550073 |
quackgrass |
Elymus repens |
|
| 1550066 |
orchardgrass |
Dactylis glomerata |
|
| 5171030 |
bronze birch borer |
Agrilus anxius |
callus formation in response to feeding of the larvae in the cambium region creates noticable ridges |
| 5171035 |
emerald ash borer |
Agrilus planipennis |
forest canopy after infestation |
| 5171036 |
emerald ash borer |
Agrilus planipennis |
root sprouts and crown dieback are typical indicatiors of an infested tree |
| 5171037 |
emerald ash borer |
Agrilus planipennis |
root sprouts and crown dieback are typical indicatiors of an infested tree |
