Content tagged "invasive herbaceous plant"

Commelina benghalensis, Benghal Dayflower

Benghal dayflower, or tropical spiderwort, is an annual or perennial creeping herb that is on the Federal Noxious Weed List. Leaves are alternate, lilylike,...

Acroptilon repens, Russian Knapweed

Russian knapweed is an invasive perennial forb that can grow to 3 ft. (1 m) in height. Stems originate from a basal rosette of leaves. The rosette leaves can...

Allium vineale, Wild Garlic

Wild garlic is an invasive perennial plant that originates from a bulb. Plants range from 11 to 35 in. (30 to 90 cm) in height and have tubular leaves. In...

Cardaria draba, Hoary Cress

Hoary cress, or whitetop, is an invasive perennial forb in the mustard family that can grow up to 2 ft. (0.6 m) tall. The leaves are soft, gray-green, 1.5 to...

Arctium minus, Lesser Burdock

Lesser burdock is a tall (up to 6 ft. [1.8 m]) invasive biennial forb that occurs throughout the United States. First-year plants form large rosettes. A...

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...

Solanum dulcamara, Bittersweet Nightshade

Bittersweet nightshade is an invasive perennial plant native to Eurasia. Plants can reach up to 6.6 ft. (2 m) tall, either erect or clambering. Leaves are...

Aegopodium podagraria, Bishops Goutweed

Bishops goutweed is an invasive creeping perennial that can grow to 3 ft. (1 m) tall. The compound leaves are alternate and have sheathing bases. The leaves...

Artemisia absinthium, Absinth Wormwood

Absinth wormwood (absinthium, common wormwood) is an invasive herbaceous perennial plant that can grow up to 5 ft. (1.5 m) tall. It has many branching stems...

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,...

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...

Centaurea calcitrapa, Purple Starthistle

Purple starthistle is a biennial to perennial invasive plant. It grows 2 to 3 ft. (0.6 to 0.9 m) tall. The stems and leaves are covered with fine hairs....

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,...

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...

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...

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...

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....

Verbascum thapsus, Common Mullein

Gardens & Landscapes Invasive Species Updated: November 12, 2015

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...

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...

Vinca major, Bigleaf Periwinkle

Bigleaf periwinkle is an invasive evergreen to semi-evergreen trailing vine that reaches to over 6.6 ft. (2 m) in length. The stems are stout, somewhat...

Carduus tenuiflorus, Slenderflower Thistle

Slenderflower thistle is an herbaceous winter annual or biennial plant that invades disturbed areas. The most serious infestations occur in the Pacific...

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...

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...

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,...

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...

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This work is supported by the USDA National Institute of Food and Agriculture, New Technologies for Ag Extension project.