PCA WEEDS STUDY GUIDE 2026 EXAM QUESTIONS AND
SOLUTIONS SCORED A+
✔✔Conyza bonariensis - ✔✔Hairy fleabane, Asteraceae
✔✔Hairy fleabane life cycle - ✔✔Summer annual
✔✔Conya canadensis - ✔✔Horseweed, Asteraceae
✔✔Horseweed life cycle - ✔✔Summer annual
✔✔Lactuca serriola - ✔✔Prickly lettuce, asteraceae
✔✔Prickly lettuce life cycle - ✔✔Winter annual
✔✔Senecio vulgaris - ✔✔Common groundsel, Asteraceae
✔✔Common groundsel life cycle - ✔✔Winter annual
✔✔Sonchus oleraceus - ✔✔Annual sowthistle, Asteraceae
✔✔Annual sowthistle life cycle - ✔✔Winter or summer annual
✔✔Amsinckia menziesii var. intermedia - ✔✔Coast fiddleneck, Boraginaceae
✔✔Coast fiddleneck life cycle - ✔✔Winter annuals
✔✔Brassica nigra - ✔✔Black mustard, Brassicaceae
✔✔Black mustard life cycle - ✔✔Winter or summer annuals, sometimes biennials
✔✔Capsella bursa-pastoris - ✔✔Shepherd's purse, brassicaceae
✔✔Shepherd's purse life cycle - ✔✔Winter annual
✔✔Sisymbrium irio - ✔✔London rocket, brassicaceae
✔✔London rocket life cycle - ✔✔Winter annual
✔✔Stellaria media - ✔✔Common chickweed, Caryophyllaceae
✔✔Common chickweed life cycle - ✔✔Winter annual
, ✔✔Chenopodium album - ✔✔Common lambsquarters, Chenopodiaceae
✔✔Common lambsquarters life cycle - ✔✔Summer annual
✔✔Salsola tragus - ✔✔Russian thistle, Chenopodiaceae
✔✔Russian thistle life cycle - ✔✔Annual
✔✔Convolvulus arvensis - ✔✔Field bindweed, Convolvulaceae
✔✔Field bindweed life cycle - ✔✔Perennial
✔✔Ipomoea spp. - ✔✔Morningglories, Convolvulaceae
✔✔Morningglories life cycle - ✔✔Summer annuals or perennials
✔✔Euphorbia maculata - ✔✔Spotted spurge, Euphorbiaceae
✔✔Spotted spurge life cycle - ✔✔Summer annual
✔✔Medicago lupulina - ✔✔Black Medic, Fabaceae
✔✔Black medic life cycle - ✔✔Summer or winter annual
✔✔Erodium spp. - ✔✔Filaree, Geraniaceae
✔✔Filaree life cycle - ✔✔Winter annual or biennial
✔✔Lamium amplexicaule - ✔✔Henbit, Lamiaceae
✔✔Henbit life cycle - ✔✔Winter annual, sometimes biennial
✔✔Abutilon theophrasti - ✔✔Velvetleaf, Malvaceae
✔✔Velvetleaf life cycle - ✔✔Summer annual
✔✔Malva spp. - ✔✔Mallow, Malvaceae
✔✔Mallow life cycle - ✔✔Winter annual, sometimes biennial
✔✔Oxalis pes-caprae - ✔✔Bermuda Buttercup, Oxalidaceae
✔✔Bermuda buttercup life cycle - ✔✔Perennial
SOLUTIONS SCORED A+
✔✔Conyza bonariensis - ✔✔Hairy fleabane, Asteraceae
✔✔Hairy fleabane life cycle - ✔✔Summer annual
✔✔Conya canadensis - ✔✔Horseweed, Asteraceae
✔✔Horseweed life cycle - ✔✔Summer annual
✔✔Lactuca serriola - ✔✔Prickly lettuce, asteraceae
✔✔Prickly lettuce life cycle - ✔✔Winter annual
✔✔Senecio vulgaris - ✔✔Common groundsel, Asteraceae
✔✔Common groundsel life cycle - ✔✔Winter annual
✔✔Sonchus oleraceus - ✔✔Annual sowthistle, Asteraceae
✔✔Annual sowthistle life cycle - ✔✔Winter or summer annual
✔✔Amsinckia menziesii var. intermedia - ✔✔Coast fiddleneck, Boraginaceae
✔✔Coast fiddleneck life cycle - ✔✔Winter annuals
✔✔Brassica nigra - ✔✔Black mustard, Brassicaceae
✔✔Black mustard life cycle - ✔✔Winter or summer annuals, sometimes biennials
✔✔Capsella bursa-pastoris - ✔✔Shepherd's purse, brassicaceae
✔✔Shepherd's purse life cycle - ✔✔Winter annual
✔✔Sisymbrium irio - ✔✔London rocket, brassicaceae
✔✔London rocket life cycle - ✔✔Winter annual
✔✔Stellaria media - ✔✔Common chickweed, Caryophyllaceae
✔✔Common chickweed life cycle - ✔✔Winter annual
, ✔✔Chenopodium album - ✔✔Common lambsquarters, Chenopodiaceae
✔✔Common lambsquarters life cycle - ✔✔Summer annual
✔✔Salsola tragus - ✔✔Russian thistle, Chenopodiaceae
✔✔Russian thistle life cycle - ✔✔Annual
✔✔Convolvulus arvensis - ✔✔Field bindweed, Convolvulaceae
✔✔Field bindweed life cycle - ✔✔Perennial
✔✔Ipomoea spp. - ✔✔Morningglories, Convolvulaceae
✔✔Morningglories life cycle - ✔✔Summer annuals or perennials
✔✔Euphorbia maculata - ✔✔Spotted spurge, Euphorbiaceae
✔✔Spotted spurge life cycle - ✔✔Summer annual
✔✔Medicago lupulina - ✔✔Black Medic, Fabaceae
✔✔Black medic life cycle - ✔✔Summer or winter annual
✔✔Erodium spp. - ✔✔Filaree, Geraniaceae
✔✔Filaree life cycle - ✔✔Winter annual or biennial
✔✔Lamium amplexicaule - ✔✔Henbit, Lamiaceae
✔✔Henbit life cycle - ✔✔Winter annual, sometimes biennial
✔✔Abutilon theophrasti - ✔✔Velvetleaf, Malvaceae
✔✔Velvetleaf life cycle - ✔✔Summer annual
✔✔Malva spp. - ✔✔Mallow, Malvaceae
✔✔Mallow life cycle - ✔✔Winter annual, sometimes biennial
✔✔Oxalis pes-caprae - ✔✔Bermuda Buttercup, Oxalidaceae
✔✔Bermuda buttercup life cycle - ✔✔Perennial
