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How to Manage Pests
Identification: Weed Photo Gallery
The UC IPM Weed Photo Gallery includes many,
but not all, weed species commonly found in California farms and landscapes.
Additional species will be added over time.
Acknowledgments
| Common Name |
Scientific Name |
| Amaranth, Low |
Amaranthus deflexus |
| Arrowhead, California |
Sagittaria montevidensis |
| Arrowhead, Gregg |
Sagittaria longiloba |
| Barley,
Foxtail |
Hordeum jubatum |
| Barley, Hare |
Hordeum murinum ssp. leporinum |
| Barnyardgrass |
Echinochloa crus-galli |
| Bassia, Fivehook |
Bassia hyssopifolia |
| Bentgrasses |
Agrostis spp. |
| Bermudagrass |
Cynodon dactylon |
| Bindweed, Field |
Convolvulus arvensis |
| Bittercress, Lesser-seeded |
Cardamine oligosperma |
| Blackberries, Wild |
Rubus spp. |
| Bluegrass, Annual |
Poa annua |
| Brassbuttons, Southern |
Cotula australis |
| Brome, Ripgut |
Bromus diandrus |
| Brome, Soft |
Bromus hordeaceus |
| Broomrape |
Orobanche ramosa |
| Buckwheat, Wild |
Polygonum convolvulus |
| Bulrush, Ricefield |
Scirpus mucronatus |
| Bulrush, River |
Scirpus fluviatilis |
| Burhead |
Echinodorus berteroi (E. cordifolius) |
| Burclover,
California |
Medicago polymorpha |
| Burweed, Lawn (Spurweed) |
Soliva sessilis |
| Canarygrass,
Littleseed |
Phalaris minor |
| Catsear,
Spotted |
Hypochaeris radicata |
| Cattails |
Typha spp. |
| Chamomile,
Mayweed |
Anthemis cotula |
| Chickweed, Common |
Stellaria media |
| Chickweed,
Mouseear |
Cerastium fontanum ssp. vulgare |
| Clover,
Strawberry |
Trifolium fragiferum |
| Clover,
White |
Trifolium repens |
| Cocklebur,
Common |
Xanthium strumarium |
| Crabgrasses |
Digitaria spp. |
| Crabgrass,
Large |
Digitaria sanguinalis |
| Crabgrass, Smooth |
Digitaria ischaemum |
| Cudweed, Purple |
Gnaphalium purpureum |
| Cudweeds |
Gnaphalium spp. |
| Cupgrass, Southwestern |
Eriochloa acuminate |
| Cupgrass, Prairie |
Eriochloa contracta |
Daisy,
English |
Bellis perennis |
| Dallisgrass |
Paspalum dilatatum |
| Dandelion |
Taraxacum officinale |
| Datura,
Sacred (Tolguacha) |
Datura wrightii |
| Dichondra |
Dichondra repens |
| Dock,
Curly |
Rumex crispus |
| Dodder |
Cuscuta spp. |
| Ducksalad |
Heteranthera limosa |
| Fescue,
Tall |
Festuca arundinacea |
| Fiddlenecks |
Amsinckia spp. |
| Filaree, Whitestem |
Erodium moschatum |
| Filarees |
Erodium spp. |
| Fleabane,
Hairy |
Conyza bonariensis |
| Flixweed |
Descurainia sophia |
| Fluvellins |
Kickxia spuria, K. elatine |
| Foxtail, Yellow |
Setaria pumila |
| Foxtails |
Setaria spp. |
| Geranium,
Cutleaf |
Geranium dissectum |
| Goosefoot,
Nettleleaf |
Chenopodium murale |
| Goosegrass |
Eleusine indica |
| Groundcherries |
Physalis spp. |
| Groundsel, Common |
Senecio vulgaris |
| Healall
(Selfheal) |
Prunella vulgaris |
| Hemlock, Poison |
Conium maculatum |
| Henbit |
Lamium amplexicaule |
| Horseweed |
Conyza canadensis |
| Jimsonweed |
Datura stramonium |
| Johnsongrass |
Sorghum halepense |
| Junglerice |
Echinochloa colona |
| Kikuyugrass |
Pennisetum clandestinum |
| Knapweed, Russian |
Acroptilon repens |
| Knotgrass |
Paspalum distichum |
| Knotweed, Common (Prostrate Knotweed) |
Polygonum arenastrum |
| Kochia |
Kochia scoparia |
| Kyllinga, Green |
Kyllinga brevifolia |
| Ladysthumb |
Polygonum persicaria |
| Lambsquarters,
Common |
Chenopodium album |
| Lettuce, Prickly |
Lactuca serriola |
| Lettuce, Miner's |
Claytonia perfoliata |
| Madder, Field |
Sherardia arvensis |
| Mallow, Bristly |
Modiola caroliniana |
| Mallow,
Little (Cheeseweed) |
Malva parviflora |
| Medic, Black |
Medicago lupulina |
| Milkthistle |
Silybum marianum |
| Mistletoes |
Phoradendron spp. |
| Morningglories |
Ipomoea spp. |
| Mullein, Turkey |
Croton setigerus |
| Mustard, Tumble |
Sisymbrium altissimum |
| Mustards |
Brassica spp. |
| Naiads |
Najas spp. |
| Nettle, Burning |
Urtica urens |
| Nightshade, Black |
Solanum nigrum |
| Nightshade, Hairy |
Solanum physalifolium |
| Nightshade,
Silverleaf |
Solanum elaeagnifolium |
| Nutsedge |
Cyperus spp. |
| Nutsedge, Purple |
Cyperus rotundus |
| Nutsedge, Yellow |
Cyperus esculentus |
| Oat, Wild |
Avena fatua |
| Orchardgrass |
Dactylis glomerata |
| Oxalis, Buttercup
(Bermuda Buttercup) |
Oxalis pes-caprae |
| Oxtongue, Bristly |
Picris echioides |
| Panicum,
Fall |
Panicum dichotomiflorum |
| Pearlwort, Birdseye |
Sagina procumbens |
| Pennywort |
Hydrocotyle sp. |
| Pigweed, Redroot |
Amaranthus retroflexus |
| Pigweeds |
Amaranthus spp. |
| Pimpernel, Scarlet |
Anagallis arvensis |
| Pineapple-weed |
Chamomilla suaveolens |
| Plantain, Broadleaf |
Plantago major |
| Plantain, Buckhorn |
Plantago lanceolata |
| Poison-oak, Pacific |
Toxicodendron diversilobum |
| Polypogon,
Rabbitfoot |
Polypogon monspeliensis |
| Puncturevine |
Tribulus terrestris |
| Purslane, Common |
Portulaca oleracea |
| Quackgrass |
Elytrigia repens |
| Radish,
Wild |
Raphanus raphanistrum |
| Redmaids (Desert Rockpurslane) |
Calandrinia cilata |
| Redstems |
Ammannia spp. |
| Rocket, London |
Sisymbrium irio |
| Ryegrass, Italian |
Lolium multiflorum |
| Ryegrasses |
Lolium spp. |
| Salsify,
Common |
Tragopogon porrifolius |
| Sandbur, Longspine |
Cenchrus longispinus |
| Sedge,
Smallflower Umbrella |
Cyperus difformis |
| Shepherd's-purse |
Capsella bursa-pastoris |
| Smartweed, Pale |
Polygonum lapathifolium |
| Sorrel, red |
Rumex acetosella |
| Sowthistle, Annual |
Sonchus oleraceus |
| Sowthistles |
Sonchus spp. |
| Speedwell, Persian |
Veronica persica |
| Speedwell, Thymeleaf |
Veronica serpyllifolia |
| Spikerush, Blunt |
Eleocharis obtusa |
| Sprangletop,
Bearded |
Leptochloa fascicularis |
| Spurge, Creeping |
Chamaesyce serpens |
| Spurge, Petty |
Chamaesyce peplus |
| Spurge, Spotted |
Euphorbia maculata |
| Spurry, Corn |
Spergula arvensis |
| Starthistle,
Yellow |
Centaurea solstitialis |
| Stickleaf |
Mentzelia dispersa |
| Stinkgrass |
Eragrostis spp. |
| Sunflowers |
Helianthus spp. |
| Sweetclover,
Yellow |
Melilotus officinalis |
| Swinecress (Wartcress) |
Coronopus didymus |
| Tarweeds |
Hemizonia spp. |
| Thistle, Canada |
Cirsium arvense |
| Thistle, Russian |
Salsola tragus |
| Velvetgrass, German |
Holcus mollis |
| Velvetleaf |
Abutilon theophrasti |
| Waterhyssops |
Bacopa spp. |
| Waterplantain,
Common |
Alisma plantago-aquatica |
| Wheat, Volunteer |
Triticum sp. |
| Wild Cucumber |
Marah spp. |
| Willowherbs |
Epilobium spp. |
| Witchgrass |
Panicum capillare |
| Woodsorrel,
Creeping |
Oxalis corniculata |
| Yarrow,
Common |
Achillea millefolium |
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