![Absinth Wormwood](species/photos/thumbs/absinthe-wormwood-thumb.jpg)
Absinth Wormwood
Artemisia absinthium L.
Perennial forb found in roadsides that can spread from infested hay onto farmsteads.
![Amur Maple](species/photos/thumbs/amur-maple.jpg)
Amur Maple
Acer ginnala
Can displace native shrubs and under story trees in open forests, and shades out native species in prairie habitats.
![Black Knapweed](species/photos/thumbs/Black-Knapweed.jpg)
Black Knapweed
Centaurea moncktonii
Out-competes other plants in pastures, hayfields, meadows, riparian areas, forest margins, and rights-of-way.
![Brittle Naiad](species/photos/thumbs/brittle-naiad.jpg)
Brittle Naiad
Najas minor
Thick infestations of can inhibit the growth of native aquatic vegetation and make fishing and recreational
boating difficult.
boating difficult.
![Canada Thistle](species/photos/thumbs/canada-thistle.jpg)
Canada Thistle
Cirsium arvense
Multi-million dollar losses in crop production due to competition. Releases toxic substances into the soil which inhibits growth of some plants.
![Caucasian Bluestem](species/photos/thumbs/caucasian-bluestem.jpg)
Caucasian Bluestem
Bothriochloa bladhii
Establishes easier than the native bluestems. Increases risk of wildfire due to standing dry vegetation. Competes with native vegetation.
Priority
![CURLY-LEAF PONDWEED](species/photos/thumbs/individual-plant.jpg)
CURLY-LEAF PONDWEED
Potamogeton crispus
Forms dense mats at the water surface that interfere with boating, fishing, waterfowl hunting, and swimming.
![Cutleaf & Common Teasel](species/photos/thumbs/cutleaf-common-teasel.jpg)
Cutleaf & Common Teasel
Dipsacus laciniatus & fullonum
The teasels form large dense stands that choke out desirable plant species. This can reduce forage, wildlife habitat, and species diversity.
Known
Priority
![Eurasian Watermilfoil](species/photos/thumbs/eurasian-watermilfoil.jpg)
Eurasian Watermilfoil
Myriophyllum spicatum
Competes aggressively to displace and reduce the diversity of native aquatic plants.
![European Buckthorn](species/photos/thumbs/european-buckthorn.jpg)
European Buckthorn
Rhamnus cathartica
Alternate host for oat rust; Forms thickets (sometimes monocultures) with thorns which can be hazardous; Out-competes native vegetation.
Established
![Garlic Mustard](species/photos/thumbs/garlic-mustard.jpg)
Garlic Mustard
Alliaria petiolata
Competes with native vegetation by early growth, inhibits the growth of mycorrhizal fungi, and can be lethal to butterfly larvae.
![Giant Reed](species/photos/thumbs/giant-reed.jpg)
Giant Reed
Arundo donax
Chokes rivers and streams, crowds out native plants and wildlife, and increases fire potential.
![Giant Salvinia](species/photos/thumbs/giant-salvinia.jpg)
Giant Salvinia
Salvinia molesta
Poses a serious threat to lakes, ponds, streams, rivers and other freshwater wetlands, and cultivated rice fields.
![Goatsrue](species/photos/thumbs/goatsrue.jpg)
Goatsrue
Galega officinalis
Forms dense colonies that deter livestock movement. Is toxic to sheep. Competes with native vegetation.
![Houndstongue](species/photos/thumbs/houndstongue.jpg)
Houndstongue
Cynoglossum officinale
Can cause skin irritation, gets caught in animal fur, reducing the value of the pelt.
![Hydrilla](species/photos/thumbs/hydrilla.jpg)
Hydrilla
Hydrilla verticillata
Forms tall and dense stands in the water column, blocking sunlight penetration potentially displacing other aquatic organisms and impeding water flow.
![Japanese & Giant Knotweed](species/photos/thumbs/japanese_knotweed.jpg)
Japanese & Giant Knotweed
Fallopia japonica, F. sachalinensis
Spreads rapidly and forms dense, altering habitat for wildlife, increasing the risk of flooding and river bank erosion.
![Japanese, Morrow's, Show Fly, Tatarian & Amur Honeysuckle](species/photos/thumbs/japanese-honeysuckle-thumb.jpg)
Japanese, Morrow's, Show Fly, Tatarian & Amur Honeysuckle
Lonicera japonica, L. morrowii, L. morrowii x tatarica and L. maackii
![Kudzu](species/photos/thumbs/kudzu.jpg)
Kudzu
Pueraria montana
Called “the vine that ate the South” because of its rampant growth over buildings, trees and objects.
![Leafy Spurge](species/photos/thumbs/leafy-spurge.jpg)
Leafy Spurge
Euphorbia esula
Costs millions of dollars annually due to lost production. Considered toxic to cattle. Establishes quickly and easily and out-competes native vegetation.
![Musk Thistle](species/photos/thumbs/musk-thistle.jpg)
Musk Thistle
Carduus nutans
Prolific seed production. Forms dense colonies which reduces yield in forage crops. Competes with native vegetation.
![Oriental Bittersweet](species/photos/thumbs/oriental-bittersweet-4.jpg)
Oriental Bittersweet
Celastrus orbiculatus
Vigorously growing vine that smothers vegetation. This plant is displacing native American bittersweet through competition and hybridization.
Established
![Palmer Amaranth](species/photos/thumbs/palmer-amaranth.jpg)
Palmer Amaranth
Amaranthus palmeri
Palmer amaranth can be toxic to livestock. It can reduce
corn yields by 91% and soybean yields by 79%.
corn yields by 91% and soybean yields by 79%.
![Perennial Pepperweed](species/photos/thumbs/perennial-pepperweed.jpg)
Perennial Pepperweed
Lepidium latifolium
Brings salt from deep in the soil to the surface. Grows into dense colonies which reduces habitat for wildlife.
![Phragmites Common Reed](species/photos/thumbs/phragmites-common-reed.jpg)
Phragmites Common Reed
Phragmites australis
Forms dense stands over very large areas, restricting water movement, trapping sediment and causing changes in water quality.
![Plumeless Thistle](species/photos/thumbs/plumeless-thistle.jpg)
Plumeless Thistle
Carduus acanthoides
Thousands of dollars lost in Nebraska agricultural production annually. Competes with native vegetation.
![Purple Loosestrife](species/photos/thumbs/purple_loosestrife.jpg)
Purple Loosestrife
Lythrum salicaria, L. virgatum.
Thousands of dollars lost in Nebraska agricultural production annually. Competes with native vegetation.
![Russian Knapweed](species/photos/thumbs/russian-knapweed.jpg)
Russian Knapweed
Acroptilon repens
Forms dense, single species stands over time due to competition and allelopathy; is toxic to horses.
Priority
![Saint John'swort](species/photos/thumbs/st-johns-wort.jpg)
Saint John'swort
Hypericum perforatum
A single plant can produce 15,000-30,000 seeds; Forms dense colonies and can be toxic to livestock. Competes with native vegetation.
![Saltcedar](species/photos/thumbs/saltcedar.jpg)
Saltcedar
Tamarix ramosissima
Pulls heavy amounts of water from the soil with long taproot; competes with native vegetation; standing vegetation can increase risk of fire.
![Saltlover](species/photos/thumbs/saltlover.jpg)
Saltlover
Halogeton glomeratus
High in oxalates and is a serious health threat to grazing animals, especially sheep.
![Sericea Lespedeza](species/photos/thumbs/sericea-lespedeza.jpg)
Sericea Lespedeza
Lespedeza cuneata
Seeds remain viable for up to 20 years, contains dyes that reduce forage value and aggressively competes with native vegetation.
![Sickleweed](species/photos/thumbs/sickleweed.jpg)
Sickleweed
Falcaria vulgaris
Forms dense populations, alters plant community composition and structure when it invades perennial grasslands.
![Spotted & Diffuse Knapweed](species/photos/thumbs/spotted-diffuse-knapweed.jpg)
Spotted & Diffuse Knapweed
Centaurea biebersteinii, Centaurea diffusa
Allelopathic chemicals affect other plants. Establishes readily on disturbed ground, decreases forage production for livestock.
![Sulphur Cinquefoil](species/photos/thumbs/sulphur-cinquefoil.jpg)
Sulphur Cinquefoil
Potentilla recta
Vigorous growth rate due to persistent fibrous root system, can self pollinate. Competes with native vegetation.
![Sweet Autumn Virgin's Bower](species/photos/thumbs/sweet-autumn-virgins-bower.jpg)
Sweet Autumn Virgin's Bower
Clematis terniflora
Vigorous growth rate, forms a dense tangle that can completely overtake supporting structures/plants.
![Water Hyacinth](species/photos/thumbs/water-hyacinth.jpg)
Water Hyacinth
Eichhornia spp.
Rapidly grows/spreads, seen as dense floating mats on the water which restricts light for organisms below, inhibits recreational activities.
![Yellow Bedstraw](species/photos/thumbs/yellow-bedstraw.jpg)
Yellow Bedstraw
Galium verum
Can out-compete native species and ease of distribution makes it difficult to track.
![Yellow Bluestem](species/photos/thumbs/yellow-bluestem.jpg)
Yellow Bluestem
Bothriochloa ischaemum
Are less palatable and less nutritious to cattle than native warm-season grasses, and once established, are almost impossible to eradicate.