IWGS

Regulated Noxious Aquatic Weeds

Compiled from Federal and State confirmed lists, available online or provided by State agencies.  See notes and additional information below.

Download as PDF: Invasive Plants August 2012

Scientific Name Common Name States Notes
Aeschynomene indica Indian Jointvetch HI  
Aeschynomene rudis Rough Jointvetch CA  
Aeschynomene virginica Curly Indigo AR  
Alternanthera philoxeroides Alligatorweed AL, AZ, AR, CA, FL, PR, SC, TX  
Alternanthera sessilis Sessile Joyweed CA, DE, FL, MA, PR  
Alternanthera spp. Joyweed AR, PR  
Arundo donax Mediterranean Reed TX  
Azolla pinnata Mosquito Fern, Water Velvet ID, MA, OK, OR FED
Bacopa spp. Waterhyssop PR FOT
Brasenia schreberi Watershield PR  
Butomus umbellatus Flowering Rush CT, ID, IN, MI, MN, MT, NH, OR, SD county regulated, VT, WA, WI, City of Chicago FOT
Cabomba caroliniana Purple Fanwort CA, CT, ID, MA, ME, MI, MN regulated, NH, Nassau County NY, PR, VT, WA, WI FOT
Cabomba piauhyensis Fanwort WA  
Cabomba spp. Fanwort PR FOT
Callitriche stagnalis Pond Water-Starwort CT  
Calotropis procera Giant Milkweed PR  
Canna flaccida Canna PR FOT
Cardamine impatiens   MN, Long Island NY, Canada  
Casuarina spp. Australian Pine FL  

Caulerpa taxifolia

 

Calif Fish and Game Code Sec 2300 bans Caulerpa:
taxifolia, cupressoides, mexicana, sertulariodes, floridana,
ashmeadii, racemosa, verticillata, and scapelliformis

Mediterranean Caul. clone

these spp are regulated under a different law than most CA noxious weeds

MA, MD, OK, OR FED
Cephalanthus occidentalis Buttonbush PR FOT
Ceratophyllum demersum Coontail PR FOT
Ceratophyllum spp. Coontail PR FOT
Cicuta maculata Water Hemlock NV  
Colocasia esculenta Wild Taro PR FOT
Colocasia spp. Taro HI (p) (q) FOT
Crassula helmsii Swamp Stonecrop FL, MN, NC, WA, WI, Canada  
Crinum americanum Swamp Lily PR FOT
Cylindrospermopsis raciborskii Cylindro MI, WI (possible contaminent on aquatic plants)  
Cyperus esculentus Yellow Nutsedge CA, CO, HI, MI, OR, WA  
Cyperus odoratus Flatsedge PR  
Cyperus rotundus Purple Nutsedge AR, CA, OR  
Cyperus spp. Nutgrass RI FOT
Didymosphenia geminata Didymo or Rock Snot WI (possible contaminent on aquatic plants)  
Egeria (Elodea) densa Brazilian Elodea AL, CT, ID, IN, MA, ME, MI, MN regulated, NC, NH, Nassau County NY, OR, PR, SC, VT, WA, WI, City of Chicago, IN prohibits the sale of Egeria in Garden Centers but not Pet Stores FOT
Egeria najas   CA  
Eichhornia azurea Anchored Waterhyacinth AR, AZ, LA, MA, OK, OR, TX FED
Eichhornia crassipes Waterhyacinth AL, AR, AZ, CA county regulated, LA, PR, SC, TX, City of Chicago FOT
Eichhornia spp. Waterhyacinth FL, PR FOT
Eleocharis baldwinii Slender Spikerush PR  
Eleocharis spp. Spikerush PR  
Elodea canadensis Common Elodea LA, ME  
Epilobium hirsutum Hairy Willow Herb MA, WA, WI  
Equisetum telmateia Giant Horsetail OR  
Fallopia japonica Japanese Knotweed MI, Nassau County NY, VT  
Glossostigma diandrum Mud Mat OK, WA  
Glyceria maxima Manna Grass MA, WA, WI  
Haplotyme   SD county regulated  
Heracleum mantegazzianum Giant Hogweed ID, MA, MI, Nassau County NY, WI  
Houttuynia cordata   City of Chicago FOT
Houttuynia cordata 'Variegata' Chameleon Plant City of Chicago FOT
Hydrilla hydrilla Hydrilla CO  
Hydrilla verticillata Hydrilla AZ, CA, CT, FL, ID, LA, MA, ME, MI, MS, MT, NH, NV, Nassau County NY, OK, OR, PR, SC, TX, VT, WA, WI, City of Chicago, Canada FED
Hydrocharis morsus-ranae Frogbit CA, ID, IN, ME, MI, MN, NH, Nassau County NY, VT, WA, WI, City of Chicago FOT
Hydrocotyle spp. Pennywort PR FOT
Hydrocotyle umbellata Water Pennywort PR  
Hygrophila polysperma Hygrophila, Miramar weed CA, FL, MA, OK, OR, VT FED
Ipomoea aquatica Chinese Waterspinach FL, MA, MN regulated, OK, TX, City of Chicago FED
Ipomoea fistulosa Bush Morningglory FL  
Ipomoea spp. Morningglory AZ, AR, MI, PR  
Ipomoea triloba Threelobe Morningglory AZ, FL, PR  
Iris pseudacorus Yellow Flag Iris CT, ID, IN, MA, MN, MT, Long Island NY, OR, VT, WA, City of Chicago FOT
Iris virginica Blue Flag PR FOT
Juncus effusus Soft Rush PR FOT
Lachnanthes caroliniana Redroot PR  
Lagarosiphon major Oxygen weed CA, MA, MI, OK, OR, TX, WI FED
Lagarosiphon spp. African Elodea FL, LA, MI, NC, OK  
Lemna valdiviana Valdivia Duckweed PR  
Limnobium laevigatum Sponge Plant CA  
Limnobium spongia American Frogbit CA, PR FOT
Limnocharis flava Sawah Flowering Rush, Velvet Leaf FL  
Limnophila indica Ambulia CA, Canada  
Limnophila sessiliflora Ambulia CA, FL, MA, OK, OR, Canada FED
Ludwigia alternifolia Bushy Waterprimrose PR  
Ludwigia grandiflora   Nassau County NY, Canada  
Ludwigia hexapetala Uruguay Waterprimrose NC, SC, WA  
Ludwigia peploides Water Primrose Nassau County NY FOT
Ludwigia peruviana Water Primrose CA, Canada  
Ludwigia repens Floating Waterprimrose PR  
Ludwigia spp. Waterprimrose PR FOT
Ludwigia uruguayensis Uruguay Waterprimrose NC, SC  
Luziola fluitans Southern Watergrass PR  
Lysimachia nummularia Creeping Jenny MA, Nassau County NY 1/1/2011 FOT
Lysimachia vulgaris Garden Loosestrife CT, Nassau County NY 1/1/2011, WA  
Lythrum alatum Winged Loosestrife NH, TN  
Lythrum salicaria Purple Loosestrife AL, AZ, AR, CA, CO, CT, FL, ID, IL, IN, IA, LA, MA, MI, MN, MO, MT, NC, NE, NV, NH, ND, Nassau County NY, OH, OK, OR, PA, SD, TN, TX, UT, VA, VT, WA, restricted WI, WY, City of Chicago  
Lythrum spp. (not native to specific state) Loosestrife AR, MI, MT, NC, PA, TN, WA, WI  
Lythrum virgatum Wand Loosestrife IA, MN, MT, NE, NV, NH, ND, SD, TN, WA  
Marsilea minuta Dwarf Four Leaf Clover OK  
Marsilea mutica Variegated Four Leaf Clover OK FOT
Marsilea quadrifolia Four Leaf Clover CT, OK, Canada FOT
Mechamandra alternifolia   FL  
Melaleuca quinquenervia Melaleuca DE, FL, LA, MA, NC, OK, TX  
Mentha aquatica Aquatic Mint ID(q), MT(q), NE(q), WY(q) FOT
Micranthemem umbrosum Globifera PR  
Mimosa pigra Giant Sensitive Plant FL  
Miscanthus floridulus Miscanthus HI  
Miscanthus sacchariflorus Silver Grass MA  
Monochoria hastata Monochoria FL, MA, OK, OR FED
Monochoria vaginalis Pickerelweed FL, MA FED
Murdannia keisak Marsh Dew Flower WA  
Myosotis scirpoides Forget-me-not CT, MA FOT
Myriophyllum aquaticum Parrotfeather AL, CA county regulated, CT, ID, IN, MA ,ME, MI, MN regulatedNV, NH, Nassau County NY, OR, VT, WA, WI, PR, City of Chicago, Canada FOT
Myriophyllum heterophyllum Variableleaf Watermilfoil CT, ID, MA, ME, NH, Long Island NY, VT, WA  
Myriophyllum pinnatum   ME, Nassau County NY 1/1/2011  
Myriophyllum proserpinacoides   ME  
Myriophyllum spicatum Eurasian Watermilfoil AL, CA, CO, CT, FL, ID, IN, LA, MA, ME, MI, MN, MT, NH, NC, NV, Nassau County NY, OR, PR, SC, SD, TX, VT, WA, restricted WI, City of Chicago  
Myriophyllum spp. Milfoil ME, PR FOT
Najas marina Marine Naiad CT  
Najas minor Slender-Leaved Naiad CT, IN, LA, MA, ME, MN, NC, NH, SC, WA, WI, Canada  
Nelumbo lutea American Lotus CT, PR FOT
Nitellopsis obtusa Starry Stonewort MI, WI  
Nuphar luteum Spatterdock PR FOT
Nymphaea mexicana Banana Waterlily CA, PR  
Nymphaea odorata Fragrant Waterlily CA, PR FOT
Nymphaea spp. Waterlily CA county regulated  
Nymphoides cristata Crested Floating Heart NC  
Nymphoides indica Water Snowflake NC  
Nymphoides peltata Yellow Floating Heart CT, ID, MA, ME, MI, NH, Nassau County NY, OR, VT, WA, WI, Canada FOT
Orontium aquaticum Goldenclub PR FOT
Oryza rufipogon Wild Red Rice FL  
Oryza sativa var. Red Rice AR  
Ottelia alismoides Duck-lettuce OK FED
Panicum antidotale Blue Panicgrass CA  
Panicum hemitomon Maidencane PR  
Panicum miliaceum Wild Proso Millet CO, OR  
Panicum repens Torpedo Grass AL, AZ, HI, LA, TX  
Peltandra virginica Arrow-arum PR FOT
Phalaris arundinacea Reed Canary Grass MA, Long Island NY, WI regulated  
Phragmites australis Common Reed AL, CT, ID, MA, MI, NC, NE, NH, Nassau County NY, PR, SC, SD county regulated, VT, restricted WI  
Phragmites australis aurea Variegated Dwarf Common Reed CT, MA, MI, NC, VT FOT
Phragmites australis 'Candy Stripe' Candy Stripe Reed CT, MA, MI, NC, VT  
Phragmites communis Common Reed CT, NC, SC, NH  
Pistia spp. Water Lettuce SC FOT
Pistia stratiotes Waterlettuce AL, CA county regulated, CT, FL, LA, PR, SC, TX FOT
Polygonum x bohemicum Bohemian Knotweed ID, Long Island NY, WA  
Polygonum cuspidatum Japanese Knotweed AL, CA, CO, ID, MA, Long Island NY, OR, WA, WI, WV  
Polygonum perfoliatum Mile-a-minute MA, NC, Long Island NY, OH, PA, WI  
Polygonum polystachyum Himalayan Knotweed CA, OR, WA  
Polygonum sachalinense Giant Knotweed CA, CO, ID, Long Island NY, OR, SD, county regulated, WAm WI  
Polygonum spp. Knotweed MT, PR  
Pontederia cordata Pickerelweed PR FOT
Pontederia rotundifolia Tropical Pickerelweed FL  
Pontederia spp. Pickerelweed LA FOT
Potamogeton crispus Curly Leaf Pondweed AL, CT, ID, IN, MA, ME, MI, MN, MT, NH, Long Island NY, VT, restricted WI  
Potamogeton illinoensis Illinois Pondweed PR  
Potamogeton pectinatus Sago Pondweed PR  
Potamogeton spp. Pondweed PR  
Potentilla recta Sulfur Cinquefoil CA, CO, MT, NV, OR, SD county regulated,  WA, WY county regulated  
Ranunculus acris Tall Buttercup MT  
Ranunculus ficaria Lesser celandine Long Island NY  
Ranunculus lingua Greater Spearwort City of Chicago FOT
Rorippa amphibia Water Yellowcress MA  
Rorippa microphylla Oneroe Yellowcress CT  
Rorippa nasturtium-aquaticum Watercress CT  
Rotala rotundifolia Roundleaf Rotala CA  
Rumex spp. Water Dock AR FOT
Sagittaria graminea Slender Arrowhead PR, WA FOT
Sagittaria lancifolia Lanceleaf Arrowhead PR FOT
Sagittaria latifolia Common Arrowhead PR FOT
Sagittaria platphylla Delta Arrowhead WA  
Sagittaria sagittifolia Arrowhead MA, NC, OK, Canada FED
Sagittaria spp. Arrowhead PR FOT
Salvinia auriculata Salvinia CA, CA, MA, MI, OK, VT FED
Salvinia biloba Giant Salvinia CA, MA, OK, VT FED
Salvinia herzogii Giant Salvinia CA, MA, MI, OK, VT FED
Salvinia minima Water Spangles Canada  
Salvinia molesta Giant Salvinia AR, AZ, CA, CO, CT, ID, MA, MD, MI, MS, NV, OK, OR, TN, VT FED
Salvinia spp. Waterfern FL (excludes S. minima), LA, MI, NC (excludes S. minima), OR, PR, TX  
Saururus cernuus Lizardstail PR FOT
Schinus terebinthifolius Brazilian-pepper FL  
Schoenoplectus mucronatus Ricefield Bulrush WA  
Scirpus spp. Bulrush PR FOT
Solanum cardiophyllum Heartleaf Nightshade CA  
Solanum carolinense Horsenettle AZ, AR, AK, CA, HI, IA, MI, NV  
Solanum dimidiatum Torrey's Nightshade CA  
Solanum elaeagnifolium White Horsenettle AR, MI, NV  
Solanum nigrum Black Nightshade CO, MI  
Solanum rostratum Buffalobur ID  
Solanum tampicense Wetland Nightshade MA, MI, OK FED
Sparganium erectum Exotic Bur Reed FL, MA, OK FED
Spartina alterniflora Smooth Cordgrass OR, WA FOT
Spartina anglica Common Cordgrass OR, WA  
Spartina densiflora Spartina… OR, WA  
Spartina patens Saltmeadow Cordgrass OR, WA FOT
Spirodela oligorhiza Giant Duckweed LA, TX  
Spirodela polyrhiza Giant Duckweed PR  
Stachys floridana Florida Betony NC  
Stratiotes aloides Water-aloe AL, FL, SC FED
Thalia geniculata Bent Alligator-Flag PR FOT
Trapa bicornus Water Caltrap WA  
Trapa natans Water Chestnut AL, AZ, CT, ID, IN, MA, ME, MI, MN, NH, Long Island NY, OR, SC, VT, WA, WI, City of Chicago, Canada FOT
Trapa spp. Water Chestnut FL, LA, MI, NC FOT
Typha angustifolia Narrow-Leaf Cattail IN, WI FOT
Typha x glauca Cattail Hybrid restricted WI FOT
Typha spp. Cattail PR FOT
Utricularia foliosa Leafy Bladderwort PR  
Utricularia inflata Swollen Bladderwort WA  
Utricularia spp. Bladderwort PR  
Vossia cuspidata Hippo Grass FL  
Zizania aquatica Annual Wildrice PR FOT

 

Notes & Additional Information

FED – Federal Noxious Weed List
FOT – Frequently Offered in the Trade
p – permit required
q – quarantine required

Genus spp. listing indicates any/all subspecies are prohibited. (Example: Thypha spp. = any/all Cattails are prohibited to PR)

List excludes weeds designated as "Control is county option"        
        
FL list provided by their Department of Agriculture and Consumer Services        
        
FL, NC, SC (as well as many other states) also adopt the list of Federal Noxious Weeds        
        
MN also adopts the list of Federal Parasitic & Terrestial Noxious Weeds        
        
PR (Puerto Rico) is also regulated as a state        
        
This list is regularly updated on:        
www.iwgs.org        
www.pondtrademag.com        
www.watergardenersinternational.org        
        
Please send updates to: kelly@marylandaquatic.com        
Please send updates to kelly@marylandaquatic.com        

Compiled by        
Kelly Billing, Nursery Manager, Maryland Aquatic Nursery