Invasive Species: Dipsacus fullonum, Common Teasel
Common teasel is an invasive biennial plant that exists as a basal rosette until flower stems develop. The erect flower stems reach 6 ft. (1.8 m) in height and support spiny flower heads …
Chondrilla juncea, Rush Skeletonweed
Invasive Species: Chondrilla juncea, Rush Skeletonweed
Rush skeletonweed is an invasive perennial forb that can grow up to 4 ft. (1.2 m) tall. Coarse-looking, multiple stems appear leafless due to inconspicuous leaves and arise from a basal rosette of …
Centaurea nigra, Black Knapweed
Invasive Species: Centaurea nigra, Black Knapweed
Black knapweed is an invasive perennial plant that can grow from 1 to 3 ft. (0.3 to 0.9 m) tall. Leaves, near the base, are petiolate, oblanceolate, shallowly dentate, and 2 to 10 …
Centaurea jacea, Brown Knapweed
Invasive Species: Centaurea jacea, Brown Knapweed
Brown knapweed is an invasive perennial plant that grows 1 to 3 ft (0.3 to 0.9 m) tall and invades dry fields, roadsides, and meadows. The basal leaves are oblanceolate to elliptic and …
Hieracium caespitosum, Meadow Hawkweed
Invasive Species: Hieracium caespitosum, Meadow Hawkweed
Meadow hawkweed is an invasive perennial plant in the sunflower family (Asteraceae). It grows from 1 to 3 ft. (0.3 to 0.9 m) tall and produces a milky sap when crushed. Leaves are …
Hieracium aurantiacum, Orange Hawkweed
Invasive Species: Hieracium aurantiacum, Orange Hawkweed
Orange hawkweed is an invasive perennial plant that can grow up to 11.8 to 23.6 in. (30 to 60 cm) tall and produces a milky sap. Leaves are mostly basal, elliptical, 2 to …
Dipsacus laciniatus, Cutleaf Teasel
Invasive Species: Dipsacus laciniatus, Cutleaf Teasel
Cutleaf teasel is an invasive perennial plant that grows as a basal rosette until sending up a flowering stalk that can reach 6 to 7 ft. (1.8 to 2.1 m) in height. The …
Dioscorea alata, Winged Yam
Invasive Species: Dioscorea alata, Winged Yam
Winged yam is an invasive herbaceous, twining vine that can grow to lengths exceeding 30 ft. (9.1 m). It invades open to shady areas in the extreme southeastern United States. Leaves are opposite, …
Solanum tampicense, Wetland Nightshade
Invasive Species: Solanum tampicense, Wetland Nightshade
Wetland nightshade is a sprawling, semi-woody shrub that invades wetlands in Florida. The green stems are up to 15 ft. (4.6 m) long and prickly. Leaves are alternate, to 10 in. (25 cm) …
Myriophyllum aquaticum, Parrotfeather Watermilfoil
Invasive Species: Myriophyllum aquaticum, Parrotfeather Watermilfoil
Parrotfeather watermilfoil is an herbaceous, rooted, submerged/emergent plant that invades aquatic habitats throughout much of the United States. Stems are stout and blue-green in color. Leaves are abundant, whorled, pinnately compound, and finely …