Cogongrass
Native to Asia and Africa, several cultivars of cogongrass are grown as ornamentals.
Damesrocket
Damesrocket is sold in wildflower seed mixes and is desired for its sweet scent, as a cut flower, for its essential oil, and its attraction to butterflies.
Scotch Thistle
Scotch thistle is native to Europe and eastern Asia.
Saltcedar
Saltcedar was introduced from Eurasia and is found throughout the United States.
Russian Knapweed
Russian knapweed is native to Eurasia. It infests rangelands, field edges, pasture, roadsides, and other disturbed soils.
Quackgrass
Originally found in the Mediterranean area, quackgrass infests crops, rangeland, pasture, and lawns.
Puncturevine
Native to Eurasia and Africa puncturevine can be found along roadsides, in cropland, pastures, and waste areas.
Poison Hemlock
Poison hemlock is a European native, growing 6 to 10 feet tall. It is commonly found along waterways, roadsides, and field edges and tolerates poorly drained soils. It has been mistaken for parsley and wild carrot. All parts of the plant are toxic.
Phragmites
Native to North America and Europe, phragmites is a weed in wetlands, marshes, and waterways, where it can form impenetrable stands.
Perennial Sorghum Species
Sorghum grasses include many different variants and can hybridize easily with each other, Johnsongrass and Sorghum-almum are two perennial species with particularly invasive habits