Dipsacus laciniatus (cutleaf teasel) is a herb (family Dipsacaceae) with small white flowers, finely lobed leaves and distinctively shaped fruits found in the southern ranges of Oregon. It is native to Europe and Asia. It favors grasslands. It spreads via seeds and regenerates after being cut. It is dispersed by machinery and birds.

Dittrichia viscosa (false yellowhead) is a perennial herb/subshrub (family Asteraceae) with golden-yellow flowers and thin toothed leaves found in the Sacramento Valley and San Francisco Bay area in California. It is native to the Mediterranean Basin. It favors grasslands, wetlands, and riparian and bottomland habitat. It reproduces by seed and is spread primarily via wind […]

Echium plantagineum (Patterson’s curse) is a herb (family Boraginaceae) with blue-purple to pink flowers and narrow leaves found in the central and south coast ranges of California. It is native to the Mediterranean Basin. It occurs in grasslands. It reproduces by seed and is spread by grazing livestock, ants and birds.

Eucalyptus cladocalyx (sugargum) is a tree (family Myrtaceae) with white flowers and narrow leaves found in the central and south coast ranges of California. It is native to Southern Australia. It favors woodlands and grasslands. It propagates via seeds and is dispersed by wind.

Euphorbia lathyris (caper spurge) is a herb/ (family Euphorbiaceae) with green-yellow flowers and thin narrow leaves found in the coastal ranges, western ranges, the Central Valley, and desert ranges of California. It is native to Europe. It occurs in grasslands, marshes, dunes, scrub and chaparral habitats. It spreads via seed and is dispersed by water, […]

Fallopia ×bohemica (Bohemian knotweed (Japanese x Giant knotweed) is a perennial (family Polygonaceae) with white flowers and broad leaves found in northwestern California. It is native to Japan. It favors grasslands and riparian and bottomland habitat. It spreads via rhizomes and seeds and is dispersed along watercourses and in garden waste.

Galega officinalis (professorweed) is a perennial /subshrub (family Fabaceae) with white to purple flowers and thin narrow leaves found in northwestern California. It is native to the Middle East. It favors grasslands and riparian and bottomland habitat. It reproduces by seed and is spread in animal manure, irrigation water, and through agricultural activities.

Genista linifolia (Mediterranean broom) is a shrub (family Fabaceae) with yellow flowers and thin narrow leaves found in the Channel Islands and north and south coast ranges of California. It is native to the Canary Islands, western Mediterranean and northern Africa. It favors woodlands, grasslands, and riparian and bottomland habitat. It reproduces via seed and […]

Geranium lucidum (shining Geranium) is an annual or biennial herb/ (family Geraniaceae) with pink flowers and wide, shiny, segmented leaves found in the San Francisco Bay area and north coast ranges of California. It is native to Europe, northern Africa and western Asia. It favors grasslands, dunes, and riparian and bottomland habitat. It self-pollinates and […]

Grevillea robusta (silkoak) is a tree (family Proteaceae) with yellow-orange to brown flowers and finely dissected leaves found in the central and south coast ranges of California. It is native to eastern Australia. It favors grasslands and riparian and bottomland habitat. It spreads via seeds and root suckers. Its winged seeds are dispersed by wind.