Weeds are listed alphabetically by Country.
Please click on the Weeds shown in Blue to go directly by hyperlink to information on these weeds.
Common Name (Scientific Name)
Cape tulip (Homeria)
“C”
Caimitillo (Chrysophyllum mexicanum)
Cajeput tree (Melaleuca quinquenervia)
Calabazilla (Cucurbita foetidissima)
Calico flower (Aristolochia elegans)
California grass (Urochloa mutica)
California poppy (Eschscholzia californica)
California privet (Ligustrum ovalifolium)
Californian thistle (Cirsium arvense)
Camphor laurel (Cinnamomum camphora)
Camphorweed (Heterotheca subaxillaris)
Canada bluegrass (Poa pratensis)
Canada germander (Teucrium canadense)
Canada goldenrod (Solidago altissima)
Canada thistle (Cirsium arvense)
Canadian hawkweed (Hieracium canadense)
Canadian waterweed (Elodea canadensis)
Canary grass (Phalaris arundinacea)
Canary Island St. Johnswort (Hypericum canariense)
Cantalope (Cucumis melo)
Cape broom (Genista monspessulana)
Cape weed (Arctotheca calendula)
Carolina coralbead (Cocculus carolinus)
Carolina geranium (Geranium carolinianum)
Carolina horsenettle (Solanum carolinense)
Carpenter’s weed (Achillea millefolium)
Carpetweed (Mollugo verticillata)
Carrot weed (Cupaniopsis anacardioides)
Castor bean (Ricinus communis)
Cat’s clover (Lotus corniculatus)
Catchweed bedstraw (Galium aparine)
Catclaw mimosa (Mimosa pellita)
Cathedral bell (Kalanchoe pinnata)
Cats claw (Caesalpinia decapetala)
Cattail grass (Setaria pumila)
Cattley guava (Psidium cattleianum)
Chafe weed (Gamochaeta purpurea)
Chaguan humatag (Cyperus rotundus)
Charlock mustard (Sinapis arvensis ssp. arvensis)
Cherry guava (Psidium cattleianum)
Chicken corn (Sorghum bicolor)
Chicken tree (Triadica sebifera)
Chickenspike (Sphenoclea zeylanica)
China lettuce (Lactuca serriola)
Chinaberry tree (Melia azedarach)
Chinese banyan (Ficus microcarpa)
Chinese creeper (Mikania micrantha)
Chinese elm (Ulmus parvifolia)
Chinese fan palm (Livistona chinensis)
Chinese foxtail (Setaria faberi)
Chinese guava (Psidium cattleianum)
Chinese honeysuckle (Lonicera japonica)
Chinese lespedeza (Lespedeza cuneata)
Chinese privet (Ligustrum sinense)
Chinese silvergrass (Miscanthus sinensis)
Chinese tallow tree (Triadica sebifera)
Chinese tamarisk (Tamarix chinensis)
Chinese violet (Asystasia gangetica)
Chinese waterberry (Flueggea acidoton)
Chinese wisteria (Wisteria sinensis)
Chocolateweed (Melochia corchorifolia)
Chokecherry (Prunus virginiana)
Chorispora (Chorispora tenella)
Christmas berry (Schinus terebinthifolius)
Cigue tachetee (Conium maculatum)
Clammy groundcherry (Physalis heterophylla)
Clasping pepperweed (Lepidium latifolium)
CVenus’ lookingglass (Triodanis perfoliata)
Claw vine (Macfadyena unguis-cati)
Cleavers (Galium aparine)
Climbing buckwheat (Polygonum convolvulus)
Climbing cassia (Senna pendula var. glabrata)
Climbing dayflower (Commelina diffusa)
Climbing euonymus (Euonymus fortunei)
Climbing hempweed (Mikania scandens)
Climbing milkweed (Cynanchum rossicum)
Clover dodder (Cuscuta epithymum)
Clubed begonia (Begonia cucullata)
Co muraina (Ischaemum rugosum)
Coarse fescue (Festuca arundinacea)
Coastal manroot (Marah oreganus)
Cobbler’s pegs (Bidens pilosa)
Cockle (Agrostemma githago)
C0cksfoot (Dactylis glomerata)
Cockspur (Echinochloa crus-galli)
Codlins and cream (Epilobium hirsutum)
Coffee senna (Senna occidentalis)
Coffeeweed (Cichorium intybus)
Cogon grass (Imperata cylindrica)
Colorado bur (Solanum rostratum)
Colt’s foot (Tussilago farfara)
Columbus grass (Sorghum almum)
Columnar buckthorn (Frangula alnus)
Comb hyptis (Hyptis pectinata)
Common barberry (Berberis thunbergii)
Common barley (Hordeum vulgare)
Common blue violet (Viola sororia)
Common buckthorn (Rhamnus cathartica)
Common bugloss (Anchusa officinalis)
Common burdock (Arctium minus)
Common carpetgrass (Axonopus fissifolius)
Common cat’s-ear (Hypochaeris radicata)
Common catbriar (Smilax rotundifolia)
Common cattail (Typha latifolia)
Common chickweed (Stellaria media)
Common chokecherry (Prunus virginiana)
Common cinquefoil (Potentilla simplex)
Common cocklebur (Xanthium strumarium)
Common cottonwood (Populus deltoides)
Common cowparsnip (Heracleum maximum)
Common crupina (Crupina vulgaris)
Common dandelion (Taraxacum officinale)
Common dogbane (Apocynum cannabinum)
Common evening primrose (Oenothera biennis)
Common fiddleneck (Amsinckia menziesii var. intermedia)
Common goldenrod (Solidago canadensis)
Common grape hyacinth (Muscari neglectum)
Common greenbriar (Smilax rotundifolia)
Common groundsel (Senecio vulgaris)
Common hardgrass (Sclerochloa dura)
Common ironwood (Casuarina equisetifolia)
Common knotweed (Polygonum arenastrum)
Common lambsquarters (Chenopodium album)
Common mallow (Malva neglecta)
Common milkweed (Asclepias syriaca)
Common morningglory (Ipomoea purpurea)
Common motherwort (Leonurus cardiaca)
Common mullein (Verbascum thapsus)
Common nipplewort (Lapsana communis)
Common pepperweed (Lepidium densiflorum)
Common periwinkle (Vinca major)
Common plantain (Plantago major)
Common pokeweed (Phytolacca americana)
Common privet (Ligustrum vulgare)
Common purslane (Portulaca oleracea)
Common ragweed (Ambrosia artemisiifolia)
Common reed (Phragmites australis)
Common rye (Secale cereale)
Common sagewort (Artemisia campestris)
Common sandbur (Cenchrus echinatus)
Common selfheal (Prunella vulgaris)
Common sneezeweed (Helenium autumnale)
Common speedwell (Veronica arvensis)
Common St. John’s wort (Hypericum perforatum)
Common sunflower (Helianthus annuus)
Common tansy (Tanacetum vulgare)
Common thistle (Cirsium vulgare)
Common velvetgrass (Holcus lanatus)
Common Venus’ lookingglass (Triodanis perfoliata)
Common water hemlock (Cicuta maculata)
Common waterhemp (Amaranthus tuberculatus)
Common wheat (Triticum aestivum)
Common yarrow (Achillea millefolium)
Common yellow oxalis (Oxalis stricta)
Common yellowcress (Rorippa palustris)
Compact-headed thistle (Carduus pycnocephalus)
Confederate vine (Antigonon leptopus)
Copper mallow (Sphaeralcea coccinea)
Coral ardisia (Ardisia crenata)
Coral bean tree (Adenanthera pavonina)
Coral vine (Antigonon leptopus)
Corky passionflower (Passiflora suberosa)
Corn buttercup (Ranunculus arvensis)
Corn gromwell (Buglossoides arvensis)
Corn speedwell (Veronica arvensis)
Coromandel (Asystasia gangetica)
Cotton thistle (Onopordum acanthium)
Cottonweed (Froelichia floridana)
Couch panicum (Panicum repens)
Couchgrass (Elymus repens) (Agropyron repens)
Council tree (Ficus altissima)
Cow parsnip (Heracleum maximum) (Heracleum mantegazzianum)
Cow soapwort (Vaccaria hispanica)
Crab’s eye (Abrus precatorius)
Creeper (Ampelopsis brevipedunculata)
Creeping bellflower (Campanula rapunculoides)
Creeping bentgrass (Agrostis stolonifera)
Creeping burhead (Echinodorus cordifolius)
Creeping buttercup (Ranunculus repens)
Creeping chaffweed (Alternanthera pungens)
Creeping charlie (Glechoma hederacea)
Creeping croftonweed (Ageratina riparia)
Creeping jenny (Convolvulus arvensis)
Creeping jenny (Lysimachia nummularia)
Creeping oxalis (Oxalis corniculata)
Creeping panic (Panicum repens)
Creeping sowthistle (Sonchus oleraceus)
Creeping speedwell (Veronica filiformis)
Creeping thistle (Cirsium arvense)
Creeping waterprimrose (Ludwigia peploides)
Creeping woods (Oxalis corniculata)
Creosotebush (Larrea tridentata)
Crested late-summer mint (Elsholtzia ciliata)
Crimson clover (Trifolium incarnatum)
Crofton weed (Ageratina adenophora)
Crossflower (Chorispora tenella)
Croton (Croton texensis)
Crownvetch (Securigera varia) (Coronilla varia)
Crowsfoot grass (Eleusine indica)
Cuban jute (Sida rhombifolia)
Cucha-cara (Elephantopus mollis)
Cudweed sagewort (Artemisia ludoviciana)
Cultivated radish (Raphanus sativus)
Cuman ragweed (Ambrosia psilostachya)
Cup plant (Silphium perfoliatum)
Cure for all (Pluchea carolinensis)
Curled thistle (Carduus crispus)
Curltop ladysthumb (Polygonum lapathifolium)
Curly pondweed (Potamogeton crispus)
Cypress spurge (Euphorbia cyparissias)
For the list of American Invasive Weeds starting with “D” click this link:
http://informedfarmers.com/pastures/a-z-of-weeds-d/
