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INVASIVE SPECIES - A-Z
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Carolina Fanwort
Cabomba caroliniana
Carolina fanwort forms extremely dense stands that clog drainage systems and waterways, interfering with recreational activities. Dense stands also negatively impact native biodiversity.
Cattails – Narrowleaf and Hybrid
Typha angustifolia and T. x glauca
The dense rhizome mats and thick layer of leaf litter that cattails produce, exclude other plants from growing within cattail stands, making them a threat to biodiversity.
Chinese Silver Grass
Miscanthus sinensis
Chinese silver grass rapidly spreads in areas that have been disturbed, such as roadsides. It is considered a wildfire hazard because it produces large amounts of highly flammable, dry plant material.
Common Buckthorn
Rhamnus cathartica
Common buckthorn is a deciduous shrub, or small tree, that can grow up to 25 ft in height. Bark is dark gray while inner bark is orange.
Common Periwinkle
Vinca minor
Common periwinkle is an herbaceous, perennial and evergreen groundcover. The leaves are opposite, elliptic in shape and dark green, though some varieties may have variegated coloration. It produces blue-purple flowers with 5 petals that are blunt at the tip and arranged in a spiral or “pinwheel” shape.
Common Teasel
Dipsacus fullonum
Common teasel, also referred to as Fuller’s teasel, is a biennial or short-lived perennial herbaceous plant that produces a basal rosette of puckering leaves for one or more years, and then sends up a prickly, flowering stem.
Curly-leaf Pondweed
Potamogeton crispus
Curly-leaf pondweed is a submerged perennial that resembles many native pondweeds. Care must be taken to correctly identify this species. Rigid, reddish-green, oblong leaves have distinct, finely-toothed, wavy edges. The plant's flat, reddish-brown stem grows from 1-16 ft. Most reproduction is from winter buds, called turions.
Dames Rocket
Hesperis matronalis
Dames rocket is a flowering biennial that was introduced in North America in the 1600s. During its first year, it grows as a basal rosette. In its second year, its flowering stem grows up to 4 ft. tall. Dames rocket has alternate, lance-shaped leaves with serrate margins.
Elm Zigzag Sawfly
Aproceros leucopoda
The elm zigzag sawfly is still in the early detection phase in North America. Please report all sightings of elm zigzag sawfly through iMapInvasives, to help determine the distribution of this species, ahead of any management efforts. Since most elm trees can recover from elm zigzag sawfly defoliation events, control may not be necessary, and research into management options is ongoing.