Weed Photo Gallery Select a photo below to view associated weed fact sheet. 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
