Hyoscyamus niger, Black Henbane


Invasive Species: Hyoscyamus niger, Black Henbane

Black henbane is an invasive annual or biennial plant that can grow to 3 ft. (1 m) in height. The fetid-smelling leaves are alternate, simple, toothed, up to 8 in. (20 cm) long, …

Xanthium strumarium, Common Cocklebur


Invasive Species: Xanthium strumarium, Common Cocklebur

Common cocklebur is an invasive annual herb, with several regional varieties, some possibly native to North America. Historically, the seeds were eaten by the Carolina parakeet, which is now extinct. Plants can reach …

Potentilla recta, Sulphur Cinquefoil


Invasive Species: Potentilla recta, Sulphur Cinquefoil

Sulphur cinquefoil is an invasive perennial herb that can grow to 19.7 in. (50 cm) tall. A loose rosette of long-petiolate leaves develops first and withers before flowering. Plants can be one- or …

Pastinaca sativa, Wild Parsnip


Invasive Species: Pastinaca sativa, Wild Parsnip

Wild parsnip is a biennial/perennial herb that can grow up to 4 ft. (1.2 m) in height. Leaves are alternate, compound, and branched with jagged teeth. Flowering occurs from May to June, when …

Silybum marianum, Blessed Milkthistle


Invasive Species: Silybum marianum, Blessed Milkthistle

Blessed milkthistle is an invasive annual/biennial herb native to the Mediterranean region. Plants range from 2-6 ft. (0.6-1.8 m) in height, depending on soil moisture. Leaves have shiny, green upper surfaces and are …

Salvia aethiopis, Mediterranean Sage


Invasive Species: Salvia aethiopis, Mediterranean Sage

Mediterranean sage is an invasive biennial plant with square stems reaching up to 3 ft. (0.9 m) tall. Fine, woolly hairs cover the stems, new leaves, and leaf undersides. Mature plants become less …

Lotus corniculatus, Birdsfoot Trefoil


Invasive Species: Lotus corniculatus, Birdsfoot Trefoil

Birdsfoot trefoil is an invasive low-growing, perennial forb with stems that can reach 2 ft. (0.6 m) long. Leaves are compound (with five oval to linear leaflets), stipulate, and alternate. Leaflets (upper three) …

Galega officinalis, Goatsrue


Invasive Species: Galega officinalis, Goatsrue

Goatsrue is an invasive plant found in Utah, Pennsylvania, and New York. Goatsrue is listed as a Federal Noxious Weed. It is an herbaceous, perennial plant that can grow up to 6 ft. (1.8 …

Hemerocallis fulva, Orange Daylily


Invasive Species: Hemerocallis fulva, Orange Daylily

Orange daylily is a popular ornamental that has escaped to invade natural and disturbed areas throughout the United States. Plants are 2 to 4 ft. (0.6 to 1.2 m) tall with round stems. …

Cyperus entrerianus, Deeprooted Sedge


Invasive Species: Cyperus entrerianus, Deeprooted Sedge

Deeprooted sedge is a wetland sedge that invades disturbed areas throughout the southeastern United States. It is a robust, up to 40 in. (102 cm) tall, grass-like plant with deeply set, thick rhizomes …