Connecticut State The Connecticut Agricultural Experiment Station

Online Herbarium

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Scientific Name vs. Common Name

[A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z]
*Invasive/non-native species

A

Acadian quillwort (Isoetes acadiensis)
Isoetes acadiensis, Alexander Lake in Killingly, July 27, 2011
Alternate-flowered watermilfoil (Myriophyllum alterniflorum)
Myriophyllum alterniflorum, West Side Pond in Goshen, August 29, 2012
American bur-reed (Sparganium americanum)
Sparganium americanum, Bissonnette Pond in Willington, August 28, 2006
American featherfoil (Hottonia inflata)
Hotonia inflata, Hummers Pond in Madison, May 26, 2017
American lotus (Nelumbo lutea)*
Nelumbo lutea, Putnam Park in Eastin, September 26, 2011
American water pennywort (Hydrocotyle americana)
Hydrocotyle americana, in cultivation at Exotic Fin and Feather Pet Shop in East Hartford, December 9, 2010
American water plantain (Alisma subcordatum)

American waterwort (Elatine americana)
Elatine americana Beaver Dam Lake in Stratford July 22, 2009
American white water lily (Nymphaea odorata ssp. tuberosa)
Nymphaea odorata ssp. tuberosa in Longmeadow Lake, Bethlehem, July 5. 2005
Arrowhead (Sagittaria species)
Sagittaria species, Connecticut River in Haddam, September 25, 2019
Arumleaf arrowhead (Sagittaria cuneata)
Sagittaria cuneata, Lake Zoar in Southbury, Monroe, Newtown, and Oxford, August 29, 2007

B

Bayonet rush (Juncus militaris)
Juncus militaris, Middle Quaddick Reservoir in Thompson, September 6, 2017
Berchtold's pondweed (Potamogeton berchtoldii)
Potamogeton berchtoldii, Bashan Lake in East Haddam, July 10, 2019
Bittercress (Cardamine species)
Cardamine species, Crystal Pond, July 14, 2009
Bladderwort species (Utricularia species)
Utricularia species, Lake Hayward in East Haddam, July 24, 2019
Bluntleaf pondweed (Potamogeton obtusifolius)
Potamogeton obtusifolius, Hart Pond in Litchfield, September 27, 2013
Brazilian watermeal (Wolffia brasiliensis
Wolffia brasiliensis, Mackenzie Reservoir in Wallingford, June 30, 2005
Brazilian waterweed* (Egeria densa)
Egeria densa, Dogwood Lake in Trumbull, September 29, 2020
Minor naiad* (Najas minor)
Najas Minor in Lake Lillinonah in Newtown, July 10, 2007
Broadleaf arrowhead (Sagittaria latifolia)
Sagittaria latifolia, Bassermann Pond in Branford, June 25, 2009
Brown-fruited rush (Juncus pelocarpus)
Juncus pelocarpus, Billings Lake in North Stonington, September 21, 2005
Bulrush (Schoenoplectus species)
Schoenoplectus species, Indian Lake in Sharon, June 29, 2009
Bur-reed (Sparganium species)
Sparganium species, Dogwood Lake in Trumbull, September 29, 2020

C

Canadian waterweed (Elodea canadensis)
Elodea canadensis, Indian Lake in Sharon, June 29, 2009
Clasping-leaf pondweed (Potamogeton perfoliatus)
Potamogeton perfoliatus, Lake Beseck in Middlefield, June 22, 2004
Common bladderwort (Utricularia vulgaris (formerly macrorhiza))
Utricularia macrorhiza, Chalkers Mill Pond in Old Saybrook, July 22, 2005
Common duckweed (Lemna minor)
Lemna Minor, Twin Lake North in Simsbury, September 11, 2018
Common water hyacinth* (Eichhornia crassipes)
Eichhornia crassipes Mill Pond Park in Newington, September 4, 2009
Coontail (Ceratophyllum demersum)
Ceratophyllym demersum, Coventry Lake, July 09, 2008
Curlyleaf pondweed* (Potamogeton crispus)
Potamogeton crispus, Taunton Lake in Newtown, June 15 2010
Cutleaf watermilfoil (Myriophyllum pinnatum)
Myriophyllum pinnatum, in cultivation at Slither & Swim Pets in West Haven December 14, 2010

D

Dortmann's cardinalflower (Lobelia dortmanna)
Lobelia dortmanna, Cedar Lake in Chester, September 5, 2010
Dwarf spikerush (Eleocharis parvula)
Eleocharis parvula, Canoe Brook Lake in Trumbull, August 18, 2004

E

Eaton's quillwort (Isoetes x eatonii)
Isoëtes X eatonii, Hall's Pond in Eastford, August 1, 2005
Eelgrass (Vallisneria americana)
Vallisneria americana, Uncas Lake in Lyme, July 8, 2015
Elliptic spikerush (Eleocharis elliptica)
Eleocharis elliptica, Oakwood Pond in Guilford, July 14, 2006
Engelmann's arrowhead (Sagittaria engelmanniana)
Sagittaria engelmanniana, Connecticut River in Middletown, August 18, 2020
Engelmann's quillwort (Isoetes engelmannii)
Isoëtes engelmanii, Hidden Lake in Haddam, July 11, 2005
Eurasian watermilfoil*(Myriophyllum spicatum)
Myriophyllum spicatum, Candlewood Lake in Danbury, August 27, 2015
European waterclover* (Marsilea quadrifolia)
Marsilea quadrifolia, Bunnells Pond in Bridgeport, June 30 2011

F

Fanwort* (Cabomba caroliniana)
Fanwort, Anderson Pond, August 23, 2012
Flat-leaf bladderwort (Utricularia intermedia)
Utricularia intermedia, Staffordville Reservoir in Stafford Springs, September 4, 2019
Flat-stemmed pondweed (Potamogeton zosteriformis)
Potamogeton zosteriformis, Lake Zoar in Southbury, September 3, 2015
Floating bladderwort (Utricularia radiata)
Utricularia radiata, Private pond in Clinton, August 13, 2013
Floating heart (Nymphoidesspecies)
Nymphoides species in Doaneville Pond, Griswold, July 6, 2011
Floating-leaf pondweed (Potamogeton natans)
Potamogeton natans, Staffordville Reservoir in Staffordville Springs, September 4, 2019
Forget-me-not* (Myosotis scorpioides)
Myosotis scorpioides, Crystal Lake in Middletown, August 25, 2009
Fries' pondweed (Potamogeton friesii)
Potamogeton friesii, Lake Wononscopomuc in Salisbury, September 16, 2004

G

Golden hedge-hyssop (Gratiola aurea)
Gratiola aurea, Amos Lake in Preston, August 15, 2013
Grassy arrowhead (Sagittaria graminea)
Sagittaria graminea, Lake Lillinonah in Newtown, July 27, 2007
Great bulrush (Schoenoplectus tabernaemontani)
Schoenoplectus tabernaemontani, Town Mill Pond in Guilford, July 30, 2009
Great duckweed (Spirodela polyrhiza)
Spirodela polyrhiza, Phipps Lake in West Haven, June 6, 2018
Great water starwort (Callitriche heterophylla)
Callitriche heterophylla, Red Wing Pond, July 13, 2009
Green arrow arum (Peltandra virginica)
Peltandra virginica, Roseland Lake in Woodstock, June 18, 2012

H

Hiddenfruit bladderwort (Utricularia geminiscapa)
Utricularia geminiscapa, West Lake in Guilford, August 2, 2010
Horned pondweed (Zannichellia palustris)
Zannichellia palistris, Connecticut River, Lyme, September 28, 2019
Humped bladderwort (Utricularia gibba)
Utricularia gibba, Gorton Pond in East Lyme, July 9, 2015

I

Illinois pondweed (Potamogeton illinoensis)
Potamogeton illinoensis, Indian Lake in Sharon, June 30, 2009
Illinois pondweed hybrid (Potamogeton praelongus x illinoensis)
Potamogeton praelongus x illinoensis, Tyler Lake in Goshen, August 14, 2011

K

Knotweed (Polygonum species)
Polygonum species, East Haddam, Connecticut River, August 18, 2020

L

Lake ludwigia (Ludwigia x lacustris)
Ludwigia X lacustris, West Lake in Guilford, August 2, 2010
Large-leaf pondweed (Potamogeton amplifolius)
Potamogeton amplifolius, Pistapaug Pond in Wallingford June 29, 2005
Leafy pondweed (Potamogeton foliosus)
Potamogeton foliosus, Bethmour Road Pond in Bethany, September 9, 2009
Lesser bladderwort (Utricularia minor)
Utricularia minor, Uncas Lake in Lyme, July 7, 2015
Little floating heart (Nymphoides cordata)
Nymphoides cordata in Messerschmidt Pond, Deep River/Westbrook, August 16, 2005
Long-leaf pondweed (Potamogeton nodosus)
Potamogeton nodosus, Lake Zoar in Monroe, Newtown, Oxford, and Southbury, September 2, 2008
Long-leaf pondweed hybrid (Potamogeton gramineus x nodosus)
Potamogeton gramineus x nodosus, Lake Housatonic in Shelton, July 19, 2017
Longstem waterwort (Elatine triandra)
Elatine triandra, Candlewood Lake in Brookfield, Danbury, New Fairfield, New Milford, and Sherman, September 12, 2008
Low watermilfoil (Myriophyllum humile)
Myriophyllum humile Black Pond in Middlefield/Meriden, July 5, 2011

M

Marsh bedstraw (Galium palustre)
Galium palustre, Private Pond in Stonington, May 18, 2017
Marsh mermaid weed (Proserpinaca palustris)
Proserpinaca palustris, Staffordville Reservoir in Stafford Springs, September 5, 2019
Marsh primrose-willow (Ludwigia palustris)
Ludwigia palustris, Deer Lake Reservoir in Killingworth September 14, 2009
Marshweed (Limnophila species)
Herbarium mount of Limnophila species plant found in pet store
Mayaca (Mayaca species)
Mayaca species, in cultivation at Puppy Center and Aquarium in West Hartford, September 10, 2009
Mosquitofern (Azolla species)
Mosquitofern, Private Pond West, Suffield, September 4, 2012
Mudmat (Glossostigma cleistanthum)
Glossostigma cleistanthum, Bashan Lake in East Haddam, October 5, 2016

N

Nardoo (Marsilea drummondii)
Marsilea drummondii, in cultivation at All Pets Club in Branford December 16, 2010
Narrowleaf anacharis (Egeria najas)
Egeria najas in Branford, August 21, 2009
Narrow-leaved arrowhead (Sagittaria filiformis)
Sagittaria filiformis, Connecticut River in Enfield, August 19, 2020
Needle spikerush (Eleocharis acicularis)
Eleocharis acicularis, Lake Lillinonah in Newtown, August 11, 2011
Northern hydrilla* (Hydrilla verticillata ssp. lithuanica)
Hydrilla verticillata subspecies lithuanica collected from Amos Lake in 2023.
Northern watermilfoil (Myriophyllum sibiricum)
Myriophyllum sibiricum, Black Pond in Middlefield, June 25, 2004

O

Oakes' pondweed (Potamogeton oakesianus)
Potamogeton oakesianus, Ball Pond in New Fairfield August 17, 2005
One-rowed watercress (Rorippa microphylla)
Rorippa microphylla, Private Pond in New Haven, May 14, 2010

P

Parrotfeather* (Myriophyllum aquaticum)
Myriophyllum aquaticum, Dogwood Lake in Trumbull September 29, 2020
Phragmites* (Phragmites australis)
Phragmites australis, Andover Lake in Andover, August 11, 2008
Pickerelweed (Pontederia cordata)
Pontederia cordata, Middle Bolton Lake in Vernon, July 14, 2020
Pond water starwort (Callitriche stagnalis)
Callitriche stagnalis, Red Wing Pond, July 13, 2009
Pondweed (Potamogeton species)
Potamogeton species, Connecticut River, Enfield, August 19, 2020
Primrose-willow (Ludwigiaspecies)
Ludwigia species, Eagleville Lake in Coventry, September 21, 2012
Purple bladderwort (Utricularia purpurea)
Utricularia purpurea, Lower Moodus Reservoir in East Haddam, July 7, 2009

Q

Quillwort (Isoetes species)
Isoetes species, Lake Quassapaug in Middlebury, July 20, 2011

R

Ribbon-leaf pondweed (Potamogeton epihydrus)
Potamogeton epihydrus, Private Pond in Clinton, August 13, 2013
Richardson's pondweed (Potamogeton richardsonii)
Potamogeton richardsonii, Indian Lake in Sharon, June 29, 2009
Robbins' pondweed (Potamogeton robbinsii)
Potamogeton robbinsii, Amos Lake in Preston, August 24, 2018
Rush (Juncus species)
Juncus species, Lake Winchester in Winchester, September 20, 2007

S

Sago pondweed (Stuckenia pectinatus)
Stuckenia pectinata, Candlewood Lake in Brookfield September 3, 2016
Sevenangle pipewort (Eriocaulon aquaticum)
Eriocaulon aquaticum, Lake Hayward in East Haddam, August 22, 2013
Shining pondweed (Potamogeton x nitens)
Herbarium mount of Potamogeton x nitens, or shining pondweed
Slender naiad (Najas flexilis)
Najas flexilis, Gorton Pond in East Lyme, July 9, 2015
Slender watermilfoil (Myriophyllum tenellum)
Myriophyllum tenellum, Lake Hayward in East Haddam, July 24, 2019
Small-leaved pond lily (Nuphar microphylla)
Nuphar microphylla, Pachaug Pond in Griswold, September 10, 2017
Small pondweed (Potamogeton pusillus)
Potamogeton pusillus, Lake Housatonic in Shleton, July 21, 2017
Small pondweed hybrid (Potamogeton pusillus ssp. gemmiparus)
Potamogeton pusillus ssp gemmiparus, Beseck Lake in Middlefield, June 20, 2017
Small waterwort (Elatine minima)
Elatine minima, Lower Moodus Reservoir in East Haddam July 08, 2009
Snailseed pondweed (Potamogeton bicupulatus)
Potamogeton bicupulatus, Crystal Lake in Middletown, September 3, 2008
Southern naiad (Najas guadalupensis)
Najas guadalupensis Black Pond in Woodstock, July 25, 2005
Spikerush (Eleocharis species)
Eleocharis species, Fence Rock Lake in Guilford, August 3, 2017
Spineless hornwort (Ceratophyllum echinatum)
Ceratophyllum echinatum, Upper Moodus Reservoir, July 14, 2016
Spiny-spored quillwort (Isoetes echinospora)
Isoetes echinospora, Lake Chaffee in Ashford, July20, 2009
Spiral pondweed (Potamogeton spirillus)
Potamogeton spirillus, Tyler Lake in Goshen, August 30, 2013
Spotted pondweed (Potamogeton pulcher)
Potamogeton Pulcher, Young Pond in Branford, July 1, 2009
Star duckweed (Lemna trisulca)
Lemna trisulca, Quonnipaug Lake in Guilford, July 8, 2010
Swamp loosestrife (Decodon verticillatus)
Decodon verticillatus, Bushy Pond, June 05, 2019
Swamp smartweed (Polygonum hydropiperoides)

Swollen bladderwort* (Utricularia inflata)
Swollen bladderwort mount from Bashan Lake

T

Thread-leaf naiad (Najas gracillima)
Najas gracillima, Beseck Lake in Middlefield, June 27, 2011
Tuckerman's pondweed (Potamogeton confervoides)
Potamogeton confervoides, Green Falls Reservoir in Voluntown, August 2, 2005
Tuckerman's quillwort (Isoetes tuckermannii)
Isoetes tuckermanii, Black Hall Pond in Old Lyme, August 18, 2005

U

Unidentified species
Unidentified species, Buckley Pond in Union, July 23, 2020

V

Variable-leaf watermilfoil* (Myriophyllum heterophyllum)
Myriophyllum heterophyllum, Anderson Pond in North Stonington, August 24, 2012
Variable pondweed (Potamogeton gramineus)
Potamogeton gramineus, Gardner Lake in Bozrah July 15, 2015
Variable watermilfoil hybrid* (Myriophyllum heterophyllum x laxum)
Myriophyllum heterophyllum x M. laxum, Anderson Pond in North Stonington New London, August 12, 2004
Vasey's pondweed (Potamogeton vaseyi)
Potamogeton vaseyi, Bashan Lake in East Haddam, July 10, 2019
Vernal water starwort (Callitriche verna)
Callitriche verna, Lake Lillinonah, July 27, 2007

W

Wandering hydrilla* (Hydrilla verticillata ssp. peregrina)
Hydrilla, Hydrilla verticillata, collected from Popes Pond in 2021
Water chestnut* (Trapa natans)
Trapa natans, Private Pond in Berlin, August 21, 2015
Water hyssop (Bacopa species)
Water Hyssop, All Pets Club, August 27, 2009
Water marigold (Megalodonta beckii)
Myriophyllum spicatum, Black Pond in Meriden, June 18, 2015
Watermilfoil species(Myriophyllum species)
Myriophyllum species, in cultivation at All Pets Club in Wallingford, August 28, 2009
Water pennywort (Hydrocotyle species)
Hydrocotyle species, Private Pond in New Haven, May 14, 2010
Water Plantain (Alisma species)
Water plantain, Beseck Lake, June 26, 2017
Water smartweed (Polygonum amphibium)
Polygonum amphibium, Silver Lake in Berlin/Meriden, July 2, 2008
Water spangles (Salvinia minima)
Salvinia minima, in cultivation at Petsmart in Waterbury, September 10, 2009
Water starwort (Callitriche species)
Callitriche species, Bushy Pond, June 05, 2019
Watershield (Brasenia schreberi)
Watershield, Brasenia schreberi
Water stargrass (Zosterella dubia)
Zosterella dubia, Lake Zoar in Newtown, September 6, 2013
Waterwort (Elatine species)
Elatine species, Fence Rock Lake in Guilford, August 3, 2017
Western waterweed (Elodea nuttallii)
Elodea nuttalii, Crystal Lake in Middletown, September 2, 2008
White stem pondweed (Potamogeton praelongus)
Potamogeton praelongus, Mudge Pond in Sharon, September 17, 2015
White stem pondweed hybrid (Potamogeton gramineus x praelongus)
Potamogeton gramineus x praelongus Lake Zoar in Newtown, August 30 2017
White water crowfoot (Ranunculus longirostris)
Ranunculus longirostris, Mudge Pond in Sharon, September 22, 2015
White water lily (Nymphaea odorata )
Nymphaea odorata, Alexander Lake in Killingly, July 14, 2005

Y

Yellow floating heart* (Nymphoides peltata)

Yellowseed false pimpernel (Lindernia dubia)
Lindernia dubia, Crystal Lake in Middletown, September 1, 2009
Yellow water lily (Nuphar variegata)
Nuphar variegata, Middle Bolton Lake in Vernon, July 14, 2020