Weeds

List of 90 weed fact sheets

• Weeds: Annual bluegrass – Poa annua
• Weeds: Barnyardgrass – Echinochloa crus-galli
• Weeds: Bentgrass, creeping – Agrostis stolonifera
• Weeds: Bermudagrass – Cynodon dactylon
• Weeds: Birdfoot Trefoil – Lotus corniculatus
• Weeds: Bittercress (Shotweed, Hairy bittercress) – Cardamine hirsuta
• Weeds: Bittersweet nightshade (European bittersweet) – Solanum dulcamara
• Weeds: Black medic – Medicago lupulina
• Weeds: Blackberry (Himalayan, Evergreen, Pacific) – Rubus spp.
• Weeds: Blue mustard (Purple mustard, Tenella mustard) – Chorispora tenella
• Weeds: Brackenfern, western – Pteridium aquilinum
• Weeds: Buffalobur – Solanum rostratum
• Weeds: Bull thistle – Cirsium vulgare
• Weeds: Buttercup, creeping – Ranunculus repens
• Weeds: Butterfly bush – Buddleja davidii
• Weeds: Canada thistle – Cirsium arvense
• Weeds: Catchweed bedstraw (Cleavers) – Galium aparine
• Weeds: Catsear, common (False dandelion) – Hypochaeris radicata
• Weeds: Chickweed, common and mouseear – Stellaria media, Cerastium fontanum ssp. vulgare
• Weeds: Clover – Trifolium spp.
• Weeds: Comfrey – Symphytum officinale
• Weeds: Crabgrass – Digitaria spp.
• Weeds: Creeping Jenny: Lysimachia nummularia
• Weeds: Dandelion – Taraxacum officinale
• Weeds: Dock (Curly, Broadleaf) – Rumex spp.
• Weeds: Dodder – Cuscuta spp.
• Weeds: Downy brome (Cheatgrass, Downy chess) – Bromus tectorum
• Weeds: Dwarf mistletoes – Arceuthobium spp.
• Weeds: English daisy (Lawn daisy) – Bellis perennis
• Weeds: English ivy – Hedera helix
• Weeds: Field bindweed (Wild morningglory) – Convolvulus arvensis
• Weeds: Field pennycress (Fanweed) – Thlaspi arvense
• Weeds: Flixweed – Descurainia sophia
• Weeds: Foxtail (Green, Yellow, Bristly) – Setaria spp.
• Weeds: Garden loosestrife – Lysimachia vulgaris
• Weeds: Giant hogweed – Heracleum mantegazzianum
• Weeds: Goldenrods – Solidago spp.
• Weeds: Ground ivy – Glechoma hederacea
• Weeds: Groundsel, common – Senecio vulgaris
• Weeds: Hawkweeds – Hieracium spp.
• Weeds: Hedge bindweed – Calystegia sepium (Convolvulus sepium)
• Weeds: Henbit – Lamium amplexicaule
• Weeds: Herb Robert (Robert geranium, stinky Bob) – Geranium robertianum
• Weeds: Horsetails (Scouringrush) – Equisetum spp.
• Weeds: Horseweed (Marestail) – Conyza canadensis
• Weeds: Knapweeds – Centaurea spp.
• Weeds: Knotweeds (Bohemian, Giant, Japanese, Himalayan) – Polygonum spp.
• Weeds: Kochia – Kochia scoparia
• Weeds: Lambsquarters, common – Chenopodium album
• Weeds: Lesser celandine – Ficaria verna
• Weeds: Liverworts – Several species
• Weeds: Mallow, common (Cheeseweed, Buttonweed) – Malva neglecta
• Weeds: Nightshades – Solanum spp.
• Weeds: Oxalis (Creeping woodsorrel) – Oxalis corniculata
• Weeds: Parrotfeather and Eurasian watermilfoil – Myriophyllum spp.
• Weeds: Pineappleweed – Matricaria discoidea
• Weeds: Plantain (Broadleaf, Buckhorn) – Plantago spp.
• Weeds: Poison hemlock – Conium maculatum
• Weeds: Poison ivy and Poison oak – Toxicodendron spp. (Rhus spp.)
• Weeds: Pokeweed: Phytolacca americana
• Weeds: Prickly lettuce (China lettuce) – Lactuca serriola
• Weeds: Prostrate knotweed – Polygonum aviculare
• Weeds: Puncturevine (Tackweed, Goathead) – Tribulus terrestris
• Weeds: Purple deadnettle (Red deadnettle) – Lamium purpureum
• Weeds: Purple loosestrife (Purple lythrum) – Lythrum salicaria
• Weeds: Purslane, common – Portulaca oleracea
• Weeds: Quackgrass – Elymus repens (Elytrigia repens, Agropyron repens)
• Weeds: Red sorrel (Sheep sorrel) – Rumex acetosella
• Weeds: Redroot pigweed (Rough pigweed) – Amaranthus retroflexus
• Weeds: Redstem filaree (Stork’s bill, Crane’s bill) – Erodium cicutarium
• Weeds: Reed canarygrass – Phalaris arundinacea
• Weeds: Russian thistle (Tumbleweed) – Salsola tragus (S. iberica, S. kali)
• Weeds: Ryegrass, annual (Italian ryegrass) – Lolium perenne ssp. multiflorum
• Weeds: Salsify (Goatsbeard) – Tragopogon spp.
• Weeds: Scotch broom – Cytisus scoparius
• Weeds: Shepherd’s-purse – Capsella bursa-pastoris
• Weeds: Smartweeds – Polygonum spp.
• Weeds: Sowthistle, annual and perennial – Sonchus oleraceus, Sonchus arvensis
• Weeds: Speedwells – Veronica spp.
• Weeds: Spurges (Prostrate spurges) – Chamaesyce spp. (Euphorbia spp.)
• Weeds: Stinging nettle – Urtica dioica
• Weeds: St. Johnswort, common (Goatweed, Klamathweed) – Hypericum perforatum
• Weeds: Tansy ragwort – Senecio jacobaea
• Weeds: Tumblemustard (Jim Hill mustard) – Sisymbrium altissimum
• Weeds: Velvetgrass (Common velvetgrass) – Holcus lanatus
• Weeds: Velvetleaf – Abutilon theophrasti
• Weeds: Water primrose – Ludwigia uruguayensis (L. hexapetala)
• Weeds: Waterhemlock, western – Cicuta douglasii
• Weeds: Wild carrot (Queen Anne’s lace) – Daucus carota
• Weeds: Yellow nutsedge – Cyperus esculentus

Also see weed photo gallery