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 …
Fatoua villosa, Mulberryweed
Invasive Species: Fatoua villosa, Mulberryweed
Mulberryweed is an invasive annual that can grow to 2.6 ft. (0.8 m) tall. Stems are branched, erect, and have hooked hairs. Leaves are alternate, stipulate (deciduous), petiolate, 1 to 3.9 in. (2.5 to …
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 …
Verbascum thapsus, Common Mullein
Invasive Species: Verbascum thapsus, Common Mullein
Common mullein is a biennial forb native to Eurasia and Africa. Plants are unbranched and can grow to more than 6.6 ft. (2 m) tall. First-year plants develop as a basal rosette of …
Tussilago farfara, Coltsfoot
Invasive Species: Tussilago farfara, Coltsfoot
Coltsfoot is a perennial, herbaceous plant that invades disturbed areas throughout much of the eastern United States. The basal leaves are heart-shaped, slightly toothed, and up to 6 in. (15.2 cm) wide. The dandelion-like …
Torilis japonica, Japanese Hedgeparsley
Invasive Species: Torilis japonica, Japanese Hedgeparsley
Japanese hedgeparsley is a biennial herb that grows 2-4 ft. (0.6-1.2 m) tall when flowering. First-year rosettes are low, parsley-like, and green into fall. The stem leaves are alternate, fern-like, 2-5 in. (5.1-12.7 …
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. …