Weed Identification

The following collection of weed images and descriptions was developed for CSES 3120 РPrinciples of Weed Science and is currently used as supplementary material for the class.  Feel free to browse our weed collection.

Common NameScientific Name
Amaranth, palmerAmaranthus palmers
Amaranth, spinyAmaranthus spinosus
Asiatic hawksbeardYoungia japonica
BahiagrassPaspalum notatum
BalloonvineCardiospermum halicacabum
Bermudagrass, commonCynodon dactylon
Bitter sneezeweedHelenium amarum
Blue-eyed grass, commonSisyrinchium rosulatum
Bluegrass, annualPoa annua
Bluegrass, rough-stalkPoa trivialis
Bristly mallowModiola caroliniana
Bristly starburAcanthospermum hispidum
BroomsedgeAndropogon virginicus
Buttonweed, VirginiaDiodia virginiana
CarpetweedMollugo verticillata
ChamberbitterPhyllanthus uriniaria
Chickweed, commonStellaria media
ChinaberryMelia azedarach
Chinese privetLigustrum sinense
Chinese tallowtreeTriadica sebifera
Clover, ballTrifolium nigrescens
Clover, burMedicago polymorpha
Clover, crimsonTrifolium incarnatum
Clover, large hopTrifolium campestre
Clover, rabbitsfootTrifolium arvense
Clover, redTrifolium pratense
Clover, small hopTrifolium dubium
Clover, spotted burMedicago arabica
Clover, whiteTrifolium repens
Coffee sennaSenna occidentalis
CogongrassImperata cylindrica
Copperleaf, hophornbeamAcalypha ostryifolia
Crabgrass, smoothDigitaria ischaemum
Crabgrass, southernDigitaria ciliaris
Croton, tropicCroton glandulosus ssp. septentrionalis
Croton, woollyCroton capitatus
CrowfootgrassDactyloctenium aegyptium
Cudweed, white-cloakedGamochaeta chionesthes
DallisgrassPaspalum dilatatum
Dandelion, commonTaraxacum officinale
Dandelion, falsePyrrhopappus carolinianus
Dayflower, spreadingCommelina diffusa
Deadnettle, purpleLamium purpureum
DichondraDichondra carolinensis
DogfennelEupatorium capillifolium
DoveweedMurdannia nudiflora
EcliptaEclipta prostrata
Field madderSherardia arvensis
Foxtail, giantSetaria faberi
Foxtail, greenSetaria verdis
Foxtail, knotrootSetaria parviflora
Foxtail, yellowSetaria glauca
Geranium, CarolinaGeranium carolinianum
Goldenrod, tallSolidago altissima
GoosegrassEleusine indica
Groundcherry, cutleafPhysalis angulata
Heliotrope, claspingHeliotropium amplexicaule
Hemp sesbaniaSesbania exaltata
HenbitLamium amplexicaule
Horsenettle, CarolinaSolanum carolinense
HorseweedConyza canadensis
Horseweed, hairyConyza bonariensis
JimsonweedDatura stramonium
JohnsongrassSorghum halapense
JunglericeEchinochloa colona
KudzuPueraria lobata
Kyllinga, annualKyllinga sesquiflorus
Kyllinga, cock's combKyllinga squamulata
Kyllinga, false-greenKyllinga gracillima
Kyllinga, greenKyllinga brevifolia
Lambsquarter, commonChenopodium album
Lespedeza, annualKummerowia striata
MatchweedPhyla nodiflora
Maypop passionflowerPassiflora incarnata
Mazus, JapaneseMazus pumilus
Medic, blackMedicago lupulina
Medic, round-fruitedMedicago orbicularis
Morningglory, bigrootIpomoea pandurata
Morningglory, cottonIpomoea trichocarpa var. torreyana
Morningglory, cypressvineIpomoea quamoclit
Morningglory, entireleafIpomoea hederacea ssp. integriuscula
Morningglory, ivyleafIpomoea hederacea
Morningglory, palmleafIpomoea wrightii
Morningglory, pittedIpomoea lacunosa
Morningglory, redIpomoea coccinea
Morningglory, smallflowerJacquemontia tamnifolia
Morningglory, tallIpomoea purpurea
Morninglory, purpleIpomoea turbinata
MugwortArtemisia vulgaris
Nightshade, eastern blackSolanum ptychanthum
Nits and liceHypericum drummondii
Nutsedge, purpleCyperus rotundus
Nutsedge, yellowCyperus esculentus
Old world diamond flowerHedyotis corymbosa
Parsley, wildCyclospermum leptophyllum
Partridgepea, sensitiveCassia fasciculata
Pennywort or dollarweedHydrocotyle umbellata
Perilla mintPerilla frutescens
Pigweed, smoothAmaranthus hybridus
Plantain, broadleafPlantago major
Plantain, buckhornPlantago lanceolata
PokeweedPhytolacca americana
Purslane, commonPortulaca oleracea
Pusley, FloridaRichardia scabra
Ragweed, commonAmbrosia artemisifolia
Ragweed, giantAmbrosia trifida
RustweedPolypremum procumbens
Sedge, annualCyperus compressus
Sedge, cylindricCyperus retrorsus
Sedge, globeCyperus globulosus
Sedge, rice flatCyperus iria
Shepherd's purseCapsella bursa-pastoris
Showy crotalariaCrotalaria spectabilis
SicklepodSenna obtusifolia
Sida, arrowleafSida rhombifolia
Sida, pricklySida spinosa
Signalgrass, broadleafBrachiaria platyphylla
Silktree (aka, mimosa)Albizia julibrissin
Slender ladies' tressesSpiranthes gracilis
Smartweed, PennsylvaniaPolygonum pensylvanicum
SmutgrassSporobolus indicus
Southern sandburCenchrus echinatus
Speedwell, cornVeronica arvensis
Speedwell, ivyleafVeronica hederaefolia
Speedwell, PersianVeronica persica
Speedwell, thymeleafVeronica serpyllifolia
Spring starflowerIpheion uniflorum
Spurge, hyssopChamaesyce hyssopifolia
Spurge, spottedChamaesyce maculata
Spurge, sunEuphorbia helioscopia
Spurred anodaAnoda cristata
Star-of-BethlehemOrnithogalum umbellatum
Thistle, annual sowSonchus oleraceus
TorpedograssPanicum repens
Tree of heavenAilanthus altissima
VaseygrassPaspalum urvillei
VelvetleafAbutilon theophrasti
Venus' looking glassTriodanis perfoliata
Vetch, commonVicia sativa
Vetch, large flowerVicia grandiflora
Vetch, purpleVicia americana
Vetch, springVicia lathyroides
Violet, common blueViola papilionacea
Wild garlicAllium vineale
Woodsorrel, yellowOxalis stricta