| 5482968 |
roundleaf sundew |
Drosera rotundifolia |
The sundew plant has glands which secrete a tiny droplet of clear mucilaginous substance on the ends of tiny tentacles that the plant uses to trap insects. |
| 5492637 |
crested woodfern |
Dryopteris cristata |
Dryopteris cristata (crested shield fern) fertile pinna; August 29 |
| 5475828 |
bladderwort |
Utricularia spp. |
Utricularia sp. - bladderwort |
| 5475827 |
bladderwort |
Utricularia spp. |
Utricularia sp. - bladderwort |
| 5475691 |
fragrant woodfern |
Dryopteris fragrans |
Dryopteris fragrans - fragrant woodfern - characterisitic large indusia and chaffy and glandular rachis and pinna |
| 5475690 |
fragrant woodfern |
Dryopteris fragrans |
Dryopteris fragrans - fragrant woodfern - characteristics chaffy and glandular rachis |
| 5475689 |
fragrant woodfern |
Dryopteris fragrans |
Dryopteris fragrans - fragrant woodfern - pinna showing scattered glands and large indusia |
| 5475669 |
eastern marsh fern |
Thelypteris palustris |
Thelypteris palustris - marsh fern - pinnules of fertile frond showing "dotted" sori |
| 5475670 |
eastern marsh fern |
Thelypteris palustris |
Thelypteris palustris - marsh fern - pinna of fertile frond |
| 5474912 |
bulbous waterhemlock |
Cicuta bulbifera |
Cicuta bulbifera - bulblets at base of narrow bracts |
| 5474913 |
bulbous waterhemlock |
Cicuta bulbifera |
Cicuta bulbifera - bulblets at base of narrow bracts |
| 5376301 |
yerba de hierro |
Melasma melampyroides |
Six testa envelopes containing one seed each. FNW taxon. |
| 5376303 |
yerba de hierro |
Melasma melampyroides |
Testa-covered seeds. FNW taxon. |
| 5376302 |
yerba de hierro |
Melasma melampyroides |
Two testa envelopes containing one seed each. FNW taxon. |
| 5376553 |
arrowleaved monochoria |
Monochoria hastata |
Close-up of the surface of a seed. FNW taxon. |
| 5376392 |
common crupina |
Crupina vulgaris |
Fruit attachment scar. FNW taxon. |
| 1571349 |
alfalfa |
Medicago sativa |
Dodder parasitizing alfalfa. June 1995 |
| 5459365 |
wild cucumber |
Echinocystis lobata |
Echinocystis lobata (wild cucumber, wild balsam apple); mid-July; west side of Fort Creek dam
tendril |
| 5452860 |
ornamental jewelweed |
Impatiens glandulifera |
|
| 5452846 |
ornamental jewelweed |
Impatiens glandulifera |
|
| 5452771 |
giant hogweed |
Heracleum mantegazzianum |
|
| 5452772 |
giant hogweed |
Heracleum mantegazzianum |
|
| 5341069 |
Japanese dodder |
Cuscuta japonica |
|
| 5344014 |
air-potato |
Dioscorea bulbifera |
bulbils |
| 5285098 |
common cocklebur |
Xanthium strumarium |
burs |
| 5443788 |
bulblet bladderfern |
Cystopteris bulbifera |
Showing bulblets on underside of frond |
| 5443789 |
bulblet bladderfern |
Cystopteris bulbifera |
Showing bulblets on underside of frond |
| 1330036 |
garlic mustard |
Alliaria petiolata |
S-shaped crook at base of plant helps to distinguish this species. Martin County, KY |
| 1459368 |
European stinging nettle |
Urtica dioica ssp. dioica |
Stinging trichomes |
| 5002010 |
Wyoming Indian paintbrush |
Castilleja linariifolia |
|
| 5002013 |
Wyoming Indian paintbrush |
Castilleja linariifolia |
|
| 5444628 |
crimsoneyed rosemallow |
Hibiscus moscheutos |
Ovary after flower has fallen off |
| 1381003 |
Benghal dayflower |
Commelina benghalensis |
Red hairs on leaf sheath |
| 5436719 |
burcucumber |
Sicyos angulatus |
|
| 1336004 |
Benghal dayflower |
Commelina benghalensis |
The underground flowers appear as swollen nodes. Thomas County, GA |
| 5443137 |
slenderleaf sundew |
Drosera linearis |
linear-leaved sundew, Drosera linearis |
| 0016104 |
air-potato |
Dioscorea bulbifera |
Bulbils (aerial tubers) and alternate foliage in September |
| 1459664 |
yellow starthistle |
Centaurea solstitialis |
Spines |
| 1354007 |
purple starthistle |
Centaurea calcitrapa |
Sharp spines |
| 1265072 |
British yellowhead |
Inula britannica |
Hair on Inula stems |
| 5439952 |
apple-of-Peru |
Nicandra physalodes |
Petiole attachment to stem |
| 5439946 |
purple moonflower |
Ipomoea turbinata |
Fleshy thorns on stem |
| 5439943 |
purple moonflower |
Ipomoea turbinata |
Fleshy thorns on stems |
| 1459302 |
prickly lettuce |
Lactuca serriola |
Prickles |
| 5370237 |
common chickweed |
Stellaria media |
hairs on petioles. |
| 5428271 |
lanceleaf arrowhead |
Sagittaria lancifolia |
Base of plant somewhat flattened |
| 5430641 |
air-potato |
Dioscorea bulbifera |
Bulbils attached to vine |
| 5422990 |
Sprenger's asparagus fern |
Asparagus aethiopicus |
Notice thorns at the nodes. |
| 5431747 |
bagpod |
Sesbania vesicaria |
|
| 1459660 |
yellow starthistle |
Centaurea solstitialis |
winged stem margins |
| 5126013 |
winged yam |
Dioscorea alata |
Aerial tubers (bubils) |
| 1358257 |
smooth blue aster |
Symphyotrichum laeve var. laeve |
Flower base |
| 1241277 |
crimson pitcherplant |
Sarracenia leucophylla |
|
| 2190030 |
showy rattlebox |
Crotalaria spectabilis |
Flowers and fruit |
| 1334162 |
wild parsnip |
Pastinaca sativa |
Senescing seed heads. |
| 1459723 |
bull thistle |
Cirsium vulgare |
Spines |
| 5344079 |
chamber bitter |
Phyllanthus urinaria |
|
| 1363367 |
Russian-thistle |
Salsola tragus |
Stem and foliage |
| 1342025 |
yellow pitcherplant |
Sarracenia flava |
|
| 2190022 |
showy rattlebox |
Crotalaria spectabilis |
Flowers and fruit |
| 1353042 |
northern bedstraw |
Galium boreale |
Erupting flower buds |
| 1358484 |
cutleaf daisy |
Erigeron compositus |
Flower base |
| 1358542 |
beautiful fleabane |
Erigeron formosissimus |
Stem and foliage |
| 1459206 |
poison-hemlock |
Conium maculatum |
Purple speckles |
| 1119239 |
hooded pitcherplant |
Sarracenia minor |
Pitcher |
| 1363352 |
Rollins' twinpod |
Physaria rollinsii |
Fruit and foliage |
| 1461062 |
giant reed |
Arundo donax |
Leaf collar region |
| 1459264 |
Russian knapweed |
Rhaponticum repens |
Bud stage with detached bracts |
| 1383027 |
field bindweed |
Convolvulus arvensis |
Bracts |
| 1383043 |
prickly lettuce |
Lactuca serriola |
Stem and foliage |
| 1358114 |
Parry's arnica |
Arnica parryi |
Closed flower head |
| 1363427 |
field pennycress |
Thlaspi arvense |
Stem and foliage |
| 1363368 |
Russian-thistle |
Salsola tragus |
Spines |
| 1364209 |
western sweetvetch |
Hedysarum occidentale |
Stem and foliage |
| 5428079 |
saltmarsh morningglory |
Ipomoea sagittata |
Sepals and flower emerging from leaf axil |
| 1342026 |
yellow pitcherplant |
Sarracenia flava |
|
| 1261087 |
spiked rampion |
Phyteuma spicatum |
Protected species. Grows in broadleaved forests. Flowers May ot July. |
| 1363042 |
Gunnison County rockcress |
Arabis pallidifolia |
Stem and foliage |
| 1459150 |
hemp dogbane |
Apocynum cannabinum |
|
| 1358353 |
Canada thistle |
Cirsium arvense |
Stem and foliage |
| 1380251 |
small broomrape |
Orobanche minor |
Roots |
| 5428267 |
slender rose gentian |
Sabatia campanulata |
sepals |
| 5428262 |
shortleaf rose gentian |
Sabatia brevifolia |
sepals |
| 5428263 |
shortleaf rose gentian |
Sabatia brevifolia |
sepals |
| 5428243 |
savannah meadowbeauty |
Rhexia alifanus |
Glandular hairs on underside of flower and fruiting area |
| 1363016 |
Drummond's rockcress |
Arabis drummondii |
Stem and foliage |
| 1459662 |
yellow starthistle |
Centaurea solstitialis |
Spines |
| 1119237 |
hooded pitcherplant |
Sarracenia minor |
Pitcher |
| 1358579 |
blackhead fleabane |
Erigeron melanocephalus |
Closed flower-head |
| 1358091 |
broadleaf arnica |
Arnica latifolia |
Base of flower |
| 1363030 |
Fendler's rockcress |
Arabis fendleri |
Stem and foliage |
| 1383028 |
field bindweed |
Convolvulus arvensis |
Stem and foliage |
| 1358363 |
Cainville thistle |
Cirsium calcareum |
Stem and foliage |
| 1459663 |
yellow starthistle |
Centaurea solstitialis |
Spines |
| 5294040 |
Jamaican nightshade |
Solanum jamaicense |
|
| 5294041 |
nipplefruit |
Solanum mammosum |
|
| 1383041 |
prickly lettuce |
Lactuca serriola |
Milky sap |
| 0016181 |
shrubby lespedeza |
Lespedeza bicolor |
back and front of leaves in July |
| 1358309 |
musk thistle |
Carduus nutans |
Stem and foliage |
| 1377034 |
bloodroot |
Sanguinaria canadensis |
Roots showing characteristics which gives this plant its common name "bloodroot" |
| 1358262 |
white panicle aster |
Symphyotrichum lanceolatum |
Stem and foliage |
| 1358424 |
horseweed |
Conyza canadensis |
Foliage and flower bud |
| 1459266 |
spotted knapweed |
Centaurea stoebe ssp. micranthos |
|
| 2106039 |
whiteflower leafcup |
Polymnia canadensis |
Unopened flower bud |
| 1391278 |
spiny amaranth |
Amaranthus spinosus |
Spines and stem |
| 5374971 |
floating pennywort |
Hydrocotyle ranunculoides |
inflorescence |
| 5386694 |
stinging nettle |
Urtica dioica ssp. holosericea |
stinging hairs. |
| 5426701 |
amberique-bean |
Strophostyles helvola |
vining habit |
| 5426698 |
amberique-bean |
Strophostyles helvola |
Flowers on a long peduncle from a leaf axil |
| 5426511 |
St. Peterswort |
Hypericum crux-andreae |
Flower backside showing sepals and leaves |
| 5426477 |
painted poinsettia |
Euphorbia cyathophora |
Plant contains milky sap |
| 5426453 |
field dodder |
Cuscuta pentagona |
Haustoria anchors the dodder and sucks nutrients out of the host plant |
| 5425473 |
field horsetail |
Equisetum arvense |
|
| 5401368 |
rose clover |
Trifolium hirtum |
|
| 5401248 |
alkali desertparsley |
Lomatium caruifolium |
|
| 5401174 |
Santa Cruz tarplant |
Holocarpha macradenia |
|
| 5401121 |
cutleaf geranium |
Geranium dissectum |
|
| 5422861 |
narrowleaf hawksbeard |
Crepis tectorum |
|
| 5422895 |
false chamomile |
Tripleurospermum perforatum |
|
| 5422896 |
false chamomile |
Tripleurospermum perforatum |
|
| 5423170 |
spoonleaf sundew |
Drosera intermedia |
Damselfly caught in plant |
| 5423645 |
robust horsenettle |
Solanum dimidiatum |
thorns |
| 5423238 |
Greater Florida spurge |
Euphorbia floridana |
Layering of leaves at branching point on stem |
| 5423239 |
Greater Florida spurge |
Euphorbia floridana |
Layering of leaves at branching point on stem |
| 5423242 |
Greater Florida spurge |
Euphorbia floridana |
layering of leaves at branching point on stem |
| 5423240 |
Greater Florida spurge |
Euphorbia floridana |
plant contains white latex |
| 5423167 |
spoonleaf sundew |
Drosera intermedia |
Captured insect |
| 5423168 |
spoonleaf sundew |
Drosera intermedia |
Captured insect |
| 5423172 |
spoonleaf sundew |
Drosera intermedia |
Damselfly caught in plant |
| 5423173 |
spoonleaf sundew |
Drosera intermedia |
Damselfly caught in plant |
| 5423164 |
spoonleaf sundew |
Drosera intermedia |
Sticky substance on leaves |
| 5423165 |
spoonleaf sundew |
Drosera intermedia |
captured insects |
| 5423171 |
spoonleaf sundew |
Drosera intermedia |
Damselfly caught in plant |
| 5422989 |
Sprenger's asparagus fern |
Asparagus aethiopicus |
Thorns on plant |
| 5423278 |
roundleaf bluet |
Houstonia procumbens |
Leaves pubescent |
| 5423280 |
roundleaf bluet |
Houstonia procumbens |
Flowers emerging at leaf axils |
| 5423089 |
bullnettle |
Cnidoscolus stimulosus |
Plant has separate male and female flowers |
| 5422921 |
garlic mustard |
Alliaria petiolata |
First year basal rosette |
| 5422922 |
garlic mustard |
Alliaria petiolata |
First year basal rosette stem |
| 5422942 |
wild onion |
Allium canadense |
Bract |
| 5420324 |
whisk fern |
Psilotum nudum |
Sporangia |
| 5417323 |
spoonleaf yellow loosestrife |
Lysimachia mauritiana |
Seedheads |
| 5416195 |
black spleenwort |
Asplenium adiantum-nigrum |
Sori |
| 5415305 |
alpine woodfern |
Dryopteris wallichiana |
Sori |
| 5415306 |
alpine woodfern |
Dryopteris wallichiana |
Sori |
| 5412943 |
sensitiveplant |
Mimosa pudica |
Pods |
| 5412582 |
hairy purslane |
Portulaca villosa |
Capsules |
| 5422002 |
alligatorweed |
Alternanthera philoxeroides |
Nodes
In July |
| 5413813 |
notched cowpea |
Vigna marina |
Pods |
| 5413790 |
Paraguay starbur |
Acanthospermum australe |
Habit |
| 5401265 |
miniature lupine |
Lupinus bicolor |
pods |
| 5411885 |
common vetch |
Vicia sativa |
tendril |
| 5406852 |
Carolina redroot |
Lachnanthes caroliana |
|
| 5399578 |
giant salvinia |
Salvinia molesta |
sporocarp |
| 5399579 |
giant salvinia |
Salvinia molesta |
sporocarp |
| 5399580 |
giant salvinia |
Salvinia molesta |
sporocarp |
| 5399581 |
giant salvinia |
Salvinia molesta |
sporocarp |
| 5294023 |
Jamaican nightshade |
Solanum jamaicense |
|
| 5294024 |
nipplefruit |
Solanum mammosum |
|
| 5400479 |
waterpod |
Hydrolea quadrivalvis |
|
| 5395034 |
peanut |
Arachis hypogaea |
sprouting seed with two embryos |
| 5395033 |
peanut |
Arachis hypogaea |
sprouting seed with two embryos |
| 2186048 |
wild radish |
Raphanus raphanistrum |
Roots |
| 2186049 |
wild radish |
Raphanus raphanistrum |
Raphanu raphanistrum on the left and R. sativus on the right |
| 2186050 |
turnipweed |
Rapistrum rugosum |
|
| 1550199 |
swamp smartweed |
Persicaria hydropiperoides |
|
| 5393144 |
showy evening-primrose |
Oenothera speciosa |
ovary |
| 5393143 |
showy evening-primrose |
Oenothera speciosa |
ovary |
| 1554017 |
Jerusalem artichoke |
Helianthus tuberosus |
leaf attachment |
| 1552254 |
common milkweed |
Asclepias syriaca |
leaf surface |
| 1459714 |
mountain goldenbanner |
Thermopsis montana |
Cow unable to get up after eating Thermopsis montana |
| 5392987 |
curlyleaf pondweed |
Potamogeton crispus |
Turions |
| 5392988 |
curlyleaf pondweed |
Potamogeton crispus |
Turions |
| 5392116 |
air-potato |
Dioscorea bulbifera |
Aerial bulbil |
| 5391745 |
giant salvinia |
Salvinia molesta |
"eggbeater" shaped leaf features |
| 5274013 |
lesser celandine, fig buttercup |
Ficaria verna |
Bulbs |
| 5273046 |
Scotch thistle |
Onopordum acanthium |
Spines on Leaves |
| 5272042 |
ornamental jewelweed |
Impatiens glandulifera |
Close-up of Glands |
| 5270068 |
narrowleaf bittercress |
Cardamine impatiens |
Infructescence |
| 5387493 |
giant reed |
Arundo donax |
Second-year branching pattern of giant reed |
| 5387495 |
giant reed |
Arundo donax |
vegetatively reproducing from stem fragment. |
| 5387024 |
buttercup oxalis |
Oxalis pes-caprae |
bulbs and bulblets. |
| 5386906 |
little mallow |
Malva parviflora |
flowering and fruiting stem. |
| 5386907 |
little mallow |
Malva parviflora |
flower and fruit. |
| 5386785 |
Carolina geranium |
Geranium carolinianum |
flowers and remains of fruit. |
| 5386784 |
Carolina geranium |
Geranium carolinianum |
leaf and flower. |
| 5386774 |
cutleaf geranium |
Geranium dissectum |
flowering and fruiting stem. |
| 5362816 |
Mexican fireweed |
Kochia scoparia |
Pollen grain of kochia (Kochia scoparia) under a scanning electron microscope. |
| 5374459 |
western marsh cudweed |
Gnaphalium palustre |
flowering stem |
| 5204057 |
Russian-thistle |
Salsola tragus |
plant broke loose and was caught in barbed wire fence |
| 5370201 |
Asiatic dayflower |
Commelina communis |
leaf attachment |
| 5374991 |
orbicular whitetop |
Lepidium chalepense |
flowers and fruit |
| 5374978 |
common St. Johnswort |
Hypericum perforatum |
sprout from rhizome |
| 5374966 |
Fuller's teasel |
Dipsacus sativus |
leaf base and stem |
| 5374963 |
common teasel |
Dipsacus fullonum |
leaf base and stem |
| 5374928 |
ivyleaf morningglory |
Ipomoea hederacea |
in flower with unlobed leaves. |
| 5374922 |
field bindweed |
Convolvulus arvensis |
Convolvulus arvensis on the left and Calstegia occidentalis on the right. |
| 5374920 |
mallow bindweed |
Convolvulus althaeoides |
flower and leaf |
| 5275003 |
coltsfoot |
Tussilago farfara |
Close-up of Seed Head (fruit) |
| 1196086 |
oxeye daisy |
Leucanthemum vulgare |
involucral bracts |
| 5374445 |
American burnweed |
Erechtites hieraciifolius |
flowering and fruiting heads |
| 5374810 |
sticky chickweed |
Cerastium glomeratum |
flowering stem |
| 0002106 |
giant salvinia |
Salvinia molesta |
the hairs form an 'egg-beater' shape at the tips |
| 1459116 |
hoary cress |
Lepidium draba |
|
| 5383102 |
diffuse knapweed |
Centaurea diffusa |
inflorescence stressed by biocontrol agents |
| 5383100 |
diffuse knapweed |
Centaurea diffusa |
typical features of a plant dying from attack by biocontrol agents. |
| 5383084 |
diffuse knapweed |
Centaurea diffusa |
typical bleaching of inflorescence after the emergence of Larinus minutus. |
| 5383083 |
diffuse knapweed |
Centaurea diffusa |
typical bleaching of inflorescence after the emergence of Larinus minutus. |
| 5383076 |
diffuse knapweed |
Centaurea diffusa |
typical bleaching of inflorescence after the emergence of Larinus minutus. |
| 5374882 |
Nuttall povertyweed |
Monolepis nuttalliana |
flowering stem |
| 5374857 |
garden orach |
Atriplex hortensis |
flowering stems and leaves |
| 5374856 |
Australian saltbush |
Atriplex semibaccata |
fruiting stem |
| 5374855 |
Australian saltbush |
Atriplex semibaccata |
flowering stems |
| 5374846 |
bladder campion |
Silene vulgaris |
flowers, node, and leaves |
| 5374844 |
nightflowering catchfly |
Silene noctiflora |
node and leaves |
| 5374823 |
corn spurry |
Spergula arvensis |
flowering stem |
| 5374817 |
babysbreath |
Gypsophila paniculata |
stem and leaves |
| 5374813 |
common chickweed |
Stellaria pallida |
hairs along one side of the stem |
| 5374799 |
field pennycress |
Thlaspi arvense |
in flower |
| 5374746 |
yellow fieldcress |
Rorippa sylvestris |
rhizome |
| 1548058 |
floating bladderwort |
Utricularia inflata |
bladders on leaves; photo 16 April 1977 |
| 5374745 |
yellow fieldcress |
Rorippa sylvestris |
flowers and fruit |
| 5374725 |
shining pepperweed |
Lepidium nitidum var. nitidum |
flower and fruit |
| 5374649 |
early wintercress |
Barbarea verna |
width of fruit base nearly equal to that of the pedicel |
| 5374723 |
clasping pepperweed |
Lepidium perfoliatum |
clasping leaves |
| 5374718 |
field pepperweed |
Lepidium campestre |
stem and leaf bases |
| 5374699 |
greater swinecress |
Coronopus squamatus |
flowers at plant base |
| 5374695 |
lesser swinecress |
Coronopus didymus |
flowering stem |
| 5374689 |
hairy whitetop |
Cardaria pubescens |
leaf attachment |
| 5374668 |
African mustard |
Brassica tournefortii |
downward turning hairs at base of the stem |
| 5374652 |
rapeseed |
Brassica napus |
flowers and fruit |
| 5374639 |
common comfrey |
Symphytum officinale |
stem and leaf base |
| 5374608 |
houndstongue |
Cynoglossum officinale |
flower and fruit |
| 5374597 |
common cocklebur |
Xanthium strumarium |
flower and fruit |
| 5374585 |
lesser hawkbit |
Leontodon taraxacoides |
flower and fruiting heads |
| 5374550 |
woodland groundsel |
Senecio sylvaticus |
flowering and fruiting heads |
| 5374516 |
willowleaf lettuce |
Lactuca saligna |
leaves and stem |
| 5374512 |
poverty sumpweed |
Iva axillaris |
flowering stem |
| 5374501 |
stinkwort |
Dittrichia graveolens |
flowers and fruits |
| 5374486 |
telegraphplant |
Heterotheca grandiflora |
immature stem |
| 5374449 |
smallflower galinsoga |
Galinsoga parviflora |
persistent chaff on receptacle |
| 5374448 |
smallflower galinsoga |
Galinsoga parviflora |
leaf, flower, and fruit |
| 5374447 |
smallflower galinsoga |
Galinsoga parviflora |
flowering stem |
| 5374439 |
cutleaf burnweed |
Erechtites glomeratus |
stem and leaves |
| 5374434 |
cape ivy |
Delairea odorata |
biotype with stipules. |
| 5374435 |
cape ivy |
Delairea odorata |
biotype without stipules |
| 5374433 |
cape ivy |
Delairea odorata |
flower heads and foliage. |
| 5370321 |
spotted spurge |
Euphorbia maculata |
milky sap |
| 5370319 |
spotted spurge |
Euphorbia maculata |
habit |
| 5374417 |
Italian hawksbeard |
Crepis bursifolia |
flowers and fruit |
| 5374401 |
horseweed |
Conyza canadensis |
flowering and fruiting |
| 5374396 |
hairy fleabane |
Conyza bonariensis |
flowering and fruiting stem |
| 5374375 |
chicory |
Cichorium intybus |
rosettes with previous years stems |
| 5374370 |
rush skeletonweed |
Chondrilla juncea |
downward pointing hairs at base of the stem |
| 5374362 |
sulphur knapweed |
Centaurea sulphurea |
stem and leaves |
| 5374354 |
Malta starthistle |
Centaurea melitensis |
buds and flower head |
| 5374342 |
squarrose knapweed |
Centaurea virgata |
stem and leaves |
| 5374337 |
spotted knapweed |
Centaurea stoebe ssp. micranthos |
stem and leaves |
| 5374332 |
diffuse knapweed |
Centaurea diffusa |
buds on rootstalk |
| 5374287 |
slender aster |
Symphyotrichum divaricatum |
flower and fruit |
| 5374270 |
field marigold |
Calendula arvensis |
flower and fruit |
| 5374184 |
spotted water hemlock |
Cicuta maculata var. angustifolia |
chambered root |
| 5374166 |
bur chervil |
Anthriscus caucalis |
flowers and foliage |
| 5374162 |
wild celery |
Cyclospermum leptophyllum |
flower and fruit |
| 5374115 |
crystalline iceplant |
Mesembryanthemum crystallinum |
papillae on stem and petiole |
| 5374258 |
corn chamomile |
Anthemis arvensis |
stem and foliage |
| 5374200 |
fennel |
Foeniculum vulgare |
base of plant and foliage |
| 5374195 |
Queen Anne's lace, wild carrot |
Daucus carota |
inflorescenece and infructescence |
| 5374172 |
hedgeparsley |
Torilis arvensis |
foliage and fruit |
| 5374148 |
Pacific poison-oak |
Toxicodendron diversilobum |
foliage and fruit |
| 5374129 |
spiny amaranth |
Amaranthus spinosus |
stem and thorns |
| 5374123 |
prostrate pigweed |
Amaranthus blitoides |
|
| 5370203 |
Asiatic dayflower |
Commelina communis |
rooting at nodes |
| 5276064 |
narrow swordfern |
Nephrolepis cordifolia |
Scaly tubers |
| 5358633 |
leafy spurge |
Euphorbia esula |
Close-up view of the stem of leafy spurge (Euphorbia esula), showing latex oozing from a wound. |
| 1459376 |
bittersweet nightshade |
Solanum dulcamara |
foliage and flowers |
| 1551156 |
red sorrel |
Rumex acetosella |
infructescence |
| 5330038 |
Chinese yam |
Dioscorea polystachya |
aerial tubers |
| 5371308 |
slenderflower thistle |
Carduus tenuiflorus |
flowering stems. From Weeds of California and other Western States. |
| 5358658 |
musk thistle |
Carduus nutans |
Close-up view of the stems of musk thistle (Carduus nutans) showing spiny flanges, with a flower bud in the background. |
| 5358653 |
Dalmatian toadflax |
Linaria dalmatica |
View of Dalmatian toadflax (Linaria dalmatica) in bloom, showing characteristic clasping leaves and flower. |
| 5358652 |
Dalmatian toadflax |
Linaria dalmatica |
Close-up view of the inflorescence -- flowers and buds -- of Dalmatian toadflax (Linaria dalmatica). |
| 5358640 |
spotted knapweed |
Centaurea stoebe ssp. micranthos |
Close-up view of the flower heads of a spotted knapweed plant, Centaurea stoebe ssp. micranthos (Centaurea maculosa), showing the characteristic blackish spots on the bracts. |
| 5358636 |
Russian knapweed |
Rhaponticum repens |
Close-up view of the stem and leaves of Russian knapweed (Acroptilon repens), showing characteristic fuzz (hairs, "knap"). |
| 1560160 |
white vervain |
Verbena urticifolia |
inflorescence |
| 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 |
| 1550228 |
common pokeweed |
Phytolacca americana |
flowers and immature fruit |
| 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 |
| 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 |
| 5362874 |
shepherd's-purse |
Capsella bursa-pastoris |
Flowers and developing seedpods of shepherd's purse (Capsella bursa-pastoris). |
| 5361605 |
common bean |
Phaseolus vulgaris |
Mature pods of kidney beans, on the plants. |
| 1557256 |
common milkweed |
Asclepias syriaca |
venation and hairs on lower leaf surface. |
| 1557255 |
common milkweed |
Asclepias syriaca |
underside of leaf. |
| 5363861 |
common bean |
Phaseolus vulgaris |
Close-up view of mature pinto bean pods, ready for harvest. |
| 1558240 |
poison-hemlock |
Conium maculatum |
newly developing leaves. |
| 1558199 |
broadleaf plantain |
Plantago major |
venation |
| 1558178 |
blackseed plantain |
Plantago rugelii |
Base of plant |
| 1558102 |
wild onion |
Allium canadense |
base of plant and roots |
| 5358515 |
onions |
Allium spp. |
Close-up view of the bulblets on an Egyptian Walking Onion in the Phoenix Botanical Garden. |
| 5358514 |
onions |
Allium spp. |
Close-up view of bulblets on an Egyptian Walking Onion (Allium x proliferum) in the Phoenix Botanical Garden. |
| 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 |
| 1555181 |
chicory |
Cichorium intybus |
|
| 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 |
| 5355098 |
perilla mint |
Perilla frutescens |
leaf axil, in flower |
| 5355099 |
perilla mint |
Perilla frutescens |
leaf axil |
| 1552298 |
bigroot morningglory |
Ipomoea pandurata |
reproductive structures |
| 1554299 |
common burdock |
Arctium minus |
seed heads |
| 1554300 |
common burdock |
Arctium minus |
seed heads |
| 1554288 |
common burdock |
Arctium minus |
capitula |
| 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 |
|
| 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 |
| 1551162 |
perennial sowthistle |
Sonchus arvensis |
leaf margin |
| 1551154 |
red sorrel |
Rumex acetosella |
|
| 1551030 |
curly dock |
Rumex crispus |
|
| 1551025 |
oxeye daisy |
Leucanthemum vulgare |
|
| 1551016 |
chicory |
Cichorium intybus |
|
| 1550200 |
swamp smartweed |
Persicaria hydropiperoides |
|
| 1550198 |
swamp smartweed |
Persicaria hydropiperoides |
ocrea |
| 1550196 |
swamp smartweed |
Persicaria hydropiperoides |
|
| 1550159 |
broadleaf dock |
Rumex obtusifolius |
|
| 5270004 |
wild garlic |
Allium vineale |
Bulbs |
| 5275013 |
Black dog-strangling vine, black swallowwort |
Cynanchum louiseae |
Comparision of flowers of Cynanchum louiseae (top)
and Cynanchum rossicum |
| 5275018 |
Black dog-strangling vine, black swallowwort |
Cynanchum louiseae |
Twining vines |
| 5275021 |
dog-strangling vine, European swallowwort |
Cynanchum rossicum |
Comparision of flowers of Cynanchum louiseae (top)
and Cynanchum rossicum (bottom) |
| 5349043 |
giant salvinia |
Salvinia molesta |
|
| 5341070 |
Japanese dodder |
Cuscuta japonica |
|
| 5341068 |
Japanese dodder |
Cuscuta japonica |
|
| 2132018 |
air-potato |
Dioscorea bulbifera |
Air bulbils in December |
| 1473246 |
agave |
Agave spp. |
in bloom; 6/15/1941 |
| 3694013 |
hydrilla |
Hydrilla verticillata |
tubers |
| 5272015 |
giant hogweed |
Heracleum mantegazzianum |
Stem cross-section |
| 5274062 |
giant salvinia |
Salvinia molesta |
Sporangia |
| 5273033 |
ground ivy |
Glechoma hederacea |
Vegetative spread |
| 5274006 |
curlyleaf pondweed |
Potamogeton crispus |
Turion |
| 5271020 |
greater celandine |
Chelidonium majus |
Broken stem with orange sap |
| 5178014 |
Japanese knotweed |
Fallopia japonica |
rooted into a wall |
| 5178015 |
Japanese knotweed |
Fallopia japonica |
new shoots forming |
| 5159075 |
turkeyberry |
Solanum torvum |
leaves and immature fruits |
| 5160048 |
winged yam |
Dioscorea alata |
wings on stem |
| 5161004 |
bull thistle |
Cirsium vulgare |
prickles |
| 5161058 |
common mullein |
Verbascum thapsus |
strange growth |
| 5138069 |
velvetleaf |
Abutilon theophrasti |
buds and foliage |
| 5138072 |
velvetleaf |
Abutilon theophrasti |
flower bud |
| 1324013 |
spotted St. Johnswort |
Hypericum punctatum |
Microscopic view of a hypericin-containing gland of St. John's-wort, Hypericum punctatum. |
| 5096014 |
rocket |
Hesperis spp. |
stem and foliage |
| 5089080 |
Wyoming Indian paintbrush |
Castilleja linariifolia |
reproductive parts |
| 5091022 |
thistle |
Cirsium spp. |
bracts |
| 5093093 |
blackhead fleabane |
Erigeron melanocephalus |
underside of flower showing bract |
| 5106054 |
horned dandelion |
Taraxacum ceratophorum |
flower bud |
| 5107027 |
shortray fleabane |
Erigeron lonchophyllus |
stem |
| 5097011 |
tall lettuce |
Lactuca canadensis |
flower bud |
| 5095096 |
common sunflower |
Helianthus annuus |
stem |
| 5095098 |
common sunflower |
Helianthus annuus |
back of flower showing bracts |
| 5096002 |
Nuttall's sunflower |
Helianthus nuttallii |
profile of bracts |
| 5089074 |
Wyoming Indian paintbrush |
Castilleja linariifolia |
reproductive structures |
| 5089076 |
Wyoming Indian paintbrush |
Castilleja linariifolia |
pollen on stamens |
| 5094047 |
sanddune wallflower |
Erysimum capitatum |
large root |
| 5094083 |
blanketflower |
Gaillardia aristata |
flower bud |
| 5095093 |
fivenerve helianthella |
Helianthella quinquenervis |
flower bud with ants |
| 5084082 |
pale agoseris |
Agoseris glauca |
bud |
| 5084091 |
sticky gilia |
Gilia pinnatifida |
red stem |
| 5086003 |
tower-mustard |
Arabis glabra |
buds |
| 5088072 |
yellow rocket |
Barbarea vulgaris |
stipule |
| 5078067 |
American sweetflag |
Acorus calamus |
spadix |
| 2155013 |
Florida betony |
Stachys floridana |
Root |
| 2153086 |
spotted knapweed |
Centaurea stoebe ssp. micranthos |
Unopened flower showing spots on bracts |
| 2153097 |
sulfur cinquefoil |
Potentilla recta |
Stem and foliage |
| 1459736 |
thistle |
Cirsium spp. |
Bracts clockwise from top left: Musk, Bull, Scotch, and Canada thistle |
| 1459798 |
Scotch thistle |
Onopordum acanthium |
Flower and foliage |
| 1459857 |
Dyer's woad |
Isatis tinctoria |
Flowers and fruit |
| 1459871 |
Dyer's woad |
Isatis tinctoria |
Flowers, green pods, and mature pods |
| 1459428 |
field pepperweed |
Lepidium campestre |
Fruits and foliage |
| 1459431 |
perennial pepperweed |
Lepidium latifolium |
Roots |
| 1459612 |
leafy spurge |
Euphorbia esula |
Stem and foliage |
| 1459117 |
hoary cress |
Lepidium draba |
Roots |
| 1459214 |
black henbane |
Hyoscyamus niger |
Flowers and seed capsules |
| 1416003 |
Dalmatian toadflax |
Linaria dalmatica |
Possible hybrid toadflax plant (center)
between yellow toadflax (left) and
Dalmatian toadflax (right). |
| 1416009 |
Dalmatian toadflax |
Linaria dalmatica |
Nonflowering, prostrate Dalmatian toadflax
shoots produced mid- to late summer. |
| 1391197 |
Florida betony |
Stachys floridana |
|
| 1391042 |
narrowleaf spring-beauty |
Claytonia virginica |
Tuber |
| 1119238 |
hooded pitcherplant |
Sarracenia minor |
Pitcher |
| 1119236 |
hooded pitcherplant |
Sarracenia minor |
Pitcher |
| 1116103 |
bigpod sesbania |
Sesbania herbacea |
N-Fixing nodules on Sesbania |
| 1364049 |
timber milkvetch |
Astragalus miser |
buds |
| 1363438 |
Russian-thistle |
Salsola tragus |
Pile-up of "tumbleweeds" |
| 1363441 |
tower-mustard |
Arabis glabra |
Stem and foliage |
| 1363353 |
Rollins' twinpod |
Physaria rollinsii |
Fruit and foliage |
| 1358495 |
large mountain fleabane |
Erigeron coulteri |
Flower base |
| 1353119 |
beardlip penstemon |
Penstemon barbatus |
Stem and foliage |
| 1342107 |
Indianpipe |
Monotropa uniflora |
Newly erupting plant. Tift County, GA. |
| 1342024 |
yellow pitcherplant |
Sarracenia flava |
Tift County, GA |
| 1334109 |
giant reed |
Arundo donax |
Clasping leaf bases. Tift County, GA |
| 1334110 |
giant reed |
Arundo donax |
Clasping leaf bases. Tift County, GA |
| 1336001 |
Benghal dayflower |
Commelina benghalensis |
The underground flowers appear as swollen nodes. Thomas County, GA |
| 1294017 |
British yellowhead |
Inula britannica |
This plant can remain green even during snow. |
| 1294019 |
British yellowhead |
Inula britannica |
This plant can remain green even throughout winter. |
| 1294025 |
British yellowhead |
Inula britannica |
Flower stem showing leaf detail |
| 1294026 |
British yellowhead |
Inula britannica |
Detail of stem and leaf |
| 1294029 |
British yellowhead |
Inula britannica |
Root system showing means of vegetative spread |
| 1241280 |
crimson pitcherplant |
Sarracenia leucophylla |
Alabama |
| 1241284 |
crimson pitcherplant |
Sarracenia leucophylla |
Alabama |
| 1241285 |
crimson pitcherplant |
Sarracenia leucophylla |
Alabama |
| 1241286 |
crimson pitcherplant |
Sarracenia leucophylla |
Alabama |
| 1241304 |
purple pitcherplant |
Sarracenia purpurea |
Bunswick County, North Carolina |
| 1241305 |
purple pitcherplant |
Sarracenia purpurea |
Bunswick County, North Carolina |
| 1241306 |
purple pitcherplant |
Sarracenia purpurea |
Bunswick County, North Carolina |
| 1241307 |
purple pitcherplant |
Sarracenia purpurea |
Bunswick County, North Carolina |
| 1241308 |
purple pitcherplant |
Sarracenia purpurea |
Bunswick County, North Carolina |
| 1241123 |
Venus flytrap |
Dionaea muscipula |
Brunswick County, North Carolina |
| 1237053 |
Chinese yam |
Dioscorea polystachya |
Aerial tubers and foliage |
| 2307238 |
shrubby lespedeza |
Lespedeza bicolor |
January |
| 2307243 |
sericea lespedeza |
Lespedeza cuneata |
February |
| 1299146 |
giant hogweed |
Heracleum mantegazzianum |
|
| 9005052 |
air-potato |
Dioscorea bulbifera |
bulbils in December |
| 0016190 |
sericea lespedeza |
Lespedeza cuneata |
Leaf backs (left) and leaf fronts (right) in July |
| 0016108 |
air-potato |
Dioscorea bulbifera |
Dormant aspect with bulbil in March |
| 0016109 |
air-potato |
Dioscorea bulbifera |
Bulbils (aerial tubers) in October |
| 0016141 |
giant reed |
Arundo donax |
in June |
| 0016191 |
sericea lespedeza |
Lespedeza cuneata |
in September |
| 0016183 |
shrubby lespedeza |
Lespedeza bicolor |
in July |
| 4824006 |
black senna |
Seymeria cassioides |
Closeup of foliage, flower buds and a single yellow flower. A root parasite of southern pine. |
| 4824007 |
black senna |
Seymeria cassioides |
Seed capsules. Senna is a root parasite of southern pines. |
| 4824009 |
black senna |
Seymeria cassioides |
A root parasite of southern pine. Haustorial attachment on pine root. |
