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 …
Polygonum caespitosum, Oriental Ladysthumb
Invasive Species: Polygonum caespitosum, Oriental Ladysthumb
Oriental ladysthumb is an invasive annual forb that can reach 6 to 30 in. (15.2 to 76.2 cm) in height and can be either erect or sprawling. Leaves are elongate, narrow, and pointed …
Lactuca serriola, Prickly Lettuce
Invasive Species: Lactuca serriola, Prickly Lettuce
Prickly lettuce is an invasive annual or biennial that can reach heights of 6 ft. (1.8m). Cauline leaves (on the stem) are alternate, 2 to 14 in. (5 to 36 cm) long; they …
Impatiens glandulifera, Ornamental Jewelweed
Invasive Species: Impatiens glandulifera, Ornamental Jewelweed
Ornamental jewelweed is an invasive annual. It is a succulent that can grow to be 3 to 10 ft. (0.9 to 3 m) tall. The stems are purple-tinged and hollow with opposite or …
Chelidonium majus, Greater Celandine
Invasive Species: Chelidonium majus, Greater Celandine
Greater celandine is an invasive perennial native to Europe and the Mediterranean region. It can reach from 1 to 4 ft. (0.3 to 1.2 m) in height. The leaves are up to 14 …
Robinia pseudoacacia, Black Locust
Invasive Species: Robinia pseudoacacia, Black Locust
Black locust is a deciduous tree that, while native to parts of the United States, has spread to and become invasive in other parts of the country. Trees grow from 40 to 100 …
Stellaria media, Common Chickweed
Invasive Species: Stellaria media, Common Chickweed
Common chickweed is an invasive annual, low-growing herb native to Europe. Stems are decumbent, to 19.7 in. (50 cm) long with a longitudinal line of hairs. Leaves are opposite, oval, to 0.8 in. …
Melilotus officinalis, Yellow Sweetclover
Invasive Species: Melilotus officinalis, Yellow Sweetclover
Yellow sweetclover is an invasive annual to short-lived perennial herb native to Eurasia. Plants can grow to approximately 6.5 ft. (2 m) in height and can sometimes be woody at the base. Leaves …