Agriculture: Small Grains Pest Management Guidelines

Common and Scientific Names of Weeds

Common names link to pages with weed descriptions and photos often showing several stages of development.

Common Name Scientific Name
barley, hare Hordeum leporinum
barnyardgrass Echinochloa crus-galli
bassia, fivehook Bassia hyssopifolia
bindweed, field Convolvulus arvensis
bluegrass, annual Poa annua
brome, ripgut Bromus diandrus
burclover, California Medicago polymorpha
buttercup, crowfoot Ranunculus sceleratus
canarygrass, hood Phalaris paradoxa
canarygrass, littleseed Phalaris minor
chamomile, mayweed Anthemis cotula
chickweed, common Stellaria media
fiddleneck, coast Amsinckia menziesii var. intermedia
filarees Erodium spp.
foxtails (yellow and green) Setaria spp.
goatgrass, jointed Aegilops cylindrica
goosefoot, nettleleaf Chenopodium murale
groundsel, common Senecio vulgaris
henbit Lamium amplexicaule
johnsongrass Sorghum halepense
knotweed, prostrate Polygonum aviculare
kochia Kochia scoparia
ladysthumb Polygonum persicaria
lambsquarters, common Chenopodium album
lettuce, prickly Lactuca serriola
mallow, little (cheeseweed) Malva parviflora
milkthistle Silybum marianum
miner's lettuce Claytonia perfoliata
mustards Brassica spp.
nettle, burning Urtica urens
nutsedge, yellow Cyperus esculentus
oat, wild Avena fatua
oxtongue, bristly Picris echioides
pigweed, redroot Amaranthus retroflexus
pimpernel, scarlet Anagallis arvensis
pineapple-weed Chamomilla suaveolens
polypogon, rabbitfoot Polypogon monspeliensis
radish, wild Raphanus raphanistrum
redmaids (desert rockpurslane) Calandrinia ciliata
rocket, London Sisymbrium irio
ryegrass, Italian Lolium multiflorum
shepherd's-purse Capsella bursa-pastoris
smartweed, pale Polygonum lapathofolium
sowthistle, annual Sonchus oleraceus
sowthistle, spiny Sonchus asper
spurge, prostrate Chamaesyce humistrata
spurry, corn Spergula arvensis
starthistle, yellow Centaurea solstitialis
stickleafs Mentzelia spp.
sunflowers Helianthus spp.
tarweed, coast Hemizonia corymbosa
tarweed, hayfield Hemizonia congesta
thistle, Russian Salsola tragus
Text Updated: 02/07