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