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How to Manage Pests
Identification: Weed Photo Gallery listed
by scientific name
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
| Scientific Name |
Common Name |
| Abutilon theophrasti |
Velvetleaf |
| Achillea millefolium |
Yarrow, Common |
| Acroptilon repens |
Knapweed, Russian |
| Agrostis spp. |
Bentgrasses |
| Alisma plantago-aquatica |
Waterplantain, Common |
| Amaranthus deflexus |
Amaranth, Low |
| Amaranthus retroflexus |
Pigweed, Redroot |
| Amaranthus spp. |
Pigweeds |
| Ammannia spp. |
Redstems |
| Amsinckia spp. |
Fiddlenecks |
| Anagallis arvensis |
Pimpernel, Scarlet |
| Anthemis cotula |
Chamomile, Mayweed |
| Avena fatua |
Oat, Wild |
| Bacopa spp. |
Waterhyssops |
| Bassia hyssopifolia |
Bassia, Fivehook |
| Bellis perennis |
Daisy, English |
| Brassica spp. |
Mustards |
| Bromus diandrus |
Brome, Ripgut |
| Bromus hordeaceus |
Brome, Soft |
| Calandrinia cilata |
Redmaids (Desert Rockpurslane) |
| Capsella bursa-pastoris |
Shepherd's-purse |
| Cardamine oligosperma |
Bittercress, Lesser-seeded |
| Cenchrus longispinus |
Sandbur, Longspine |
| Centaurea solstitialis |
Starthistle, Yellow |
| Cerastium fontanum ssp. vulgare |
Chickweed, Mouseear |
| Euphorbia maculata |
Spurge, Spotted |
| Chamaesyce peplus |
Spurge, Petty |
| Chamaesyce serpens |
Spurge, Creeping |
| Chamomilla suaveolens |
Pineapple-weed |
| Chenopodium album |
Lambsquarters, Common |
| Chenopodium murale |
Goosefoot, Nettleleaf |
| Cirsium arvense |
Thistle, Canada |
| Claytonia perfoliata |
Lettuce, Miner's |
| Conium maculatum |
Hemlock, Poison |
| Cotula australis |
Brassbuttons, Southern |
| Convolvulus arvensis |
Bindweed, Field |
| Conyza bonariensis |
Fleabane, Hairy |
| Conyza canadensis |
Horseweed |
| Cuscuta spp. |
Dodder |
| Cynodon dactylon |
Bermudagrass |
| Cyperus difformis |
Sedge, Smallflower
Umbrella |
| Cyperus esculentus |
Nutsedge, Yellow |
| Cyperus rotundus |
Nutsedge, Purple |
| Cyperus spp. |
Nutsedge |
| Dactylis glomerata |
Orchardgrass |
| Datura stramonium |
Jimsonweed |
| Datura wrightii |
Datura, Sacred (Tolguacha) |
| Descurainia sophia |
Flixweed |
| Dichondra repens |
Dichondra |
| Digitaria ischaemum |
Crabgrass, Smooth |
| Digitaria sanguinalis |
Crabgrass, Large |
| Digitaria spp. |
Crabgrasses |
| Echinochloa colona |
Junglerice |
| Echinochloa crus-galli |
Barnyardgrass |
| Echinodorus berteroi (E. cordifolius) |
Burhead |
| Eleocharis obtusa |
Spikerush, Blunt |
| Eleusine indica |
Goosegrass |
| Elytrigia repens |
Quackgrass |
| Epilobium spp. |
Willowherbs |
| Eragrostis spp. |
Stinkgrass |
| Croton setigerus |
Mullein, Turkey |
| Eriochloa acuminate |
Cupgrass, Southwestern |
| Eriochloa contracta |
Cupgrass, Prairie |
| Erodium moschatum |
Filaree, Whitestem |
| Erodium spp. |
Filarees |
| Festuca arundinacea |
Fescue, Tall |
| Geranium dissectum |
Geranium, Cutleaf |
| Gnaphalium purpureum |
Cudweed, Purple |
| Gnaphalium spp. |
Cudweeds |
| Helianthus spp. |
Sunflowers |
| Hemizonia spp. |
Tarweeds |
| Heteranthera limosa |
Ducksalad |
| Holcus mollis |
Velvetgrass, German |
| Hordeum jubatum |
Barley, Foxtail |
| Hordeum murinum ssp. leporinum |
Barley, Hare |
| Hypochaeris radicata |
Catsear, Spotted |
| Hydrocotyle sp. |
Pennywort |
| Ipomoea spp. |
Morningglories |
| Kickxia spuria, K. elatine |
Fluvellins |
| Kochia scoparia |
Kochia |
| Kyllinga brevifolia |
Kyllinga, Green |
| Lactuca serriola |
Lettuce, Prickly |
| Lamium amplexicaule |
Henbit |
| Leptochloa fascicularis |
Sprangletop, Bearded |
| Lolium multiflorum |
Ryegrass, Italian |
| Lolium spp. |
Ryegrasses |
| Malva parviflora |
Mallow,Llittle (Cheeseweed) |
| Marah spp. |
Wild Cucumber |
| Medicago lupulina |
Medic, Black |
| Medicago polymorpha |
Burclover, California |
| Melilotus officinalis |
Sweetclover, Yellow |
| Mentzelia dispersa |
Stickleaf |
| Modiola caroliniana |
Mallow, Bristly |
| Najas spp. |
Naiads |
| Orobanche ramosa |
Broomrape |
| Oxalis corniculata |
Woodsorrel, Creeping |
| Oxalis pes-caprae |
Oxalis, Buttercup (Bermuda
Buttercup) |
| Panicum capillare |
Witchgrass |
| Panicum dichotomiflorum |
Panicum, Fall |
| Paspalum dilatatum |
Dallisgrass |
| Paspalum distichum |
Knotgrass |
| Pennisetum clandestinum |
Kikuyugrass |
| Phalaris minor |
Canarygrass, Littleseed |
| Phoradendron spp. |
Mistletoes |
| Physalis spp. |
Groundcherries |
| Picris echioides |
Oxtongue, Bristly |
| Plantago lanceolata |
Plantain, Buckhorn |
| Plantago major |
Plantain, Broadleaf |
| Poa annua |
Bluegrass, Annual |
| Polygonum arenastrum |
Knotweed, Common (Prostrate Knotweed) |
| Polygonum convolvulus |
Buckwheat, Wild |
| Polygonum lapathifolium |
Smartweed, Pale |
| Polypogon monspeliensis |
Polypogon, Rabbitfoot |
| Portulaca oleracea |
Purslane, Common |
| Polygonum persicaria |
Ladysthumb |
| Prunella vulgaris |
Healall (Selfheal) |
| Raphanus raphanistrum |
Radish, Wild |
| Rumex acetosella |
Sorrel, Red |
| Rumex crispus |
Dock, Curly |
| Rubus spp. |
Blackberries, Wild |
| Sagina procumbens |
Pearlwort, Birdseye |
| Sagittaria longiloba |
Arrowhead, Gregg |
| Sagittaria montevidensis |
Arrowhead, California |
| Salsola tragus |
Thistle, Russian |
| Scirpus fluviatilis |
Bulrush, River |
| Scirpus mucronatus |
Bulrush, Ricefield |
| Senecio vulgaris |
Groundsel, Common |
| Setaria pumila |
Foxtail, Yellow |
| Setaria spp. |
Foxtails |
| Sherardia arvensis |
Madder, Field |
| Silybum marianum |
Milkthistle |
| Sisymbrium altissimum |
Mustard, Tumble |
| Sisymbrium irio |
Rocket, London |
| Solanum elaeagnifolium |
Nightshade, Silverleaf |
| Solanum nigrum |
Nightshade, Black |
| Solanum physalifolium |
Nightshade, Hairy |
| Soliva sessilis |
Burweed, Lawn (Spurweed) |
| Sonchus oleraceus |
Sowthistle, Annual |
| Sonchus spp. |
Sowthistles |
| Sorghum halepense |
Johnsongrass |
| Spergula arvensis |
Spurry, Corn |
| Stellaria media |
Chickweed, Common |
| Taraxacum officinale |
Dandelion |
| Toxicodendron diversilobum |
Poison-oak, Pacific |
| Tragopogon porrifolius |
Salsify, Common |
| Tribulus terrestris |
Puncturevine |
| Trifolium fragiferum |
Clover, Strawberry |
| Trifolium repens |
Clover, White |
| Triticum sp. |
Wheat, Volunteer |
| Typha spp. |
Cattails |
| Urtica urens |
Nettle, Burning |
| Veronica persica |
Speedwell, Persian |
| Veronica serpyllifolia |
Speedwell, Thymeleaf |
| Xanthium strumarium |
Cocklebur, Common |
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