Centaurea diluta (North African knapweed) is an annual herb/ (family Asteraceae) with pink-purple flowers and lobed leaves found in the San Francisco Bay area and south coast ranges of California. It is native to southwestern Europe. It favors grasslands. Its hairy seeds are dispersed via wind. It was said to have been introduced to Great […]

Cestrum parqui (willow jessamine) is a tree (family Solanaceae) with yellow flowers and narrow leaves found in the San Francisco Bay area and south coast ranges of California. It is native to South America. It favors grasslands. It spreads via seeds and root suckers. Seeds are dispersed by birds, water and dumped garden waste.

Cytisus proliferus (tagasaste) is a shrub (family Fabaceae) with white flowers and oval-shaped leaves found in the San Francisco Bay area and south coast ranges of California. It is native to the Canary Islands. It occurs in dunes and grasslands. Its seeds spread via ants, birds, slashing, dumped garden waste and machinery. It also resprouts after […]

Chasmanthe floribunda (African cornflag) is a perennial herb (family Iridaceae) with red flowers and long narrow leaves found in the coastal ranges, San Francisco Bay area and southwestern ranges of California. It is native to southern Africa. It favors dunes, scrub and chaparral habitats. It reproduces by corms which multiply rapidly. Seeds are dispersed by […]

Cytisus multiflorus (white Spanish broom) is a shrub (family Fabaceae) with white flowers and tiny narrow leaves found in the Sierra Nevada and coastal ranges of California. It is native to Spain and Portugal. It favors woodlands and grasslands. It spreads via seeds which are explosively released from the parent plant. Seeds can be dispersed […]

Datura inoxia (pricklyburr) is a herb (family Solanaceae) with large white flowers, broad leaves and prickly fruits found in the south and central western ranges of California. It is native to Mexico and Central America. It favors dunes and grasslands. It spreads via seed and rhizomes. Seeds are dispersed via ants, birds, animal fur and […]

Dipogon lignosus (Cape sweet pea) is a perennial vine (family Fabaceae) with pink flowers and broad triangular leaves found in the southwestern ranges of California. It is native to South Africa. It favors forests, woodlands, and riparian and bottomland habitat. It spreads via seeds and rhizomes. Seeds are dispersed via birds, water and possibly ants.

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.