Connecticut State The Connecticut Agricultural Experiment Station

Online Herbarium

Listed by Scientific Name

View by Common Name

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

Alisma species (water plantain)
Water plantain, Beseck Lake, June 26, 2017
Alisma subcordatum (American water plantain)

Azolla species (mosquitofern)
Mosquitofern, Private Pond West, Suffield, September 4, 2012

B

Bacopa species (water hyssop)
Water Hyssop, All Pets Club, August 27, 2009
Brasenia schreberi (watershield)
Watershield, Brasenia schreberi

C

Cabomba caroliniana (fanwort)*
Fanwort, Anderson Pond, August 23, 2012
Callitriche heterophylla (great water starwort)
Callitriche heterophylla, Red Wing Pond, July 13, 2009
Callitriche species (water starwort)
Callitriche species, Bushy Pond, June 05, 2019
Callitriche stagnalis (pond water starwort)*
Callitriche stagnalis, Red Wing Pond, July 13, 2009
Callitriche verna (vernal water starwort)
Callitriche verna, Lake Lillinonah, July 27, 2007
Cardamine species (bittercress)
Cardamine species, Crystal Pond, July 14, 2009
Ceratophyllum demersum (coontail)
Ceratophyllym demersum, Coventry Lake, July 09, 2008
Ceratophyllum echinatum (spineless hornwort)
Ceratophyllum echinatum, Upper Moodus Reservoir, July 14, 2016

D

Decodon verticillatus (swamp loosestrife)
Decodon verticillatus, Bushy Pond, June 05, 2019

E

Egeria densa (Brazilian waterweed)*
Egeria densa, Dogwood Lake in Trumbull, September 29, 2020
Egeria najas (narrowleaf anacharis)
Egeria najas in Branford, August 21, 2009
Eichhornia crassipes (common water-hyacinth)*
Eichhornia crassipes Mill Pond Park in Newington, September 4, 2009
Elatine americana (American waterwort)
Elatine americana Beaver Dam Lake in Stratford July 22, 2009
Elatine minima (small waterwort)
Elatine minima, Lower Moodus Reservoir in East Haddam July 08, 2009
Elatine species (waterwort species)
Elatine species, Fence Rock Lake in Guilford, August 3, 2017
Elatine triandra (longstem waterwort)*
Elatine triandra, Candlewood Lake in Brookfield, Danbury, New Fairfield, New Milford, and Sherman, September 12, 2008
Eleocharis acicularis (needle spikerush)
Eleocharis acicularis, Lake Lillinonah in Newtown, August 11, 2011
Eleocharis elliptica (elliptic spikerush)
Eleocharis elliptica, Oakwood Pond in Guilford, July 14, 2006
Eleocharis parvula (dwarf spikerush)
Eleocharis parvula, Canoe Brook Lake in Trumbull, August 18, 2004
Eleocharis species (spikerush species)
Eleocharis species, Fence Rock Lake in Guilford, August 3, 2017
Elodea canadensis (Canadian waterweed)
Elodea canadensis, Indian Lake in Sharon, June 29, 2009
Elodea nuttallii (western waterweed)
Elodea nuttalii, Crystal Lake in Middletown, September 2, 2008
Eriocaulon aquaticum (sevenangle pipewort)
Eriocaulon aquaticum, Lake Hayward in East Haddam, August 22, 2013

G

Galium palustre (marsh bedstraw)
Galium palustre, Private Pond in Stonington, May 18, 2017
Glossostigma cleistanthum (mudmat)*
Glossostigma cleistanthum, Bashan Lake in East Haddam, October 5, 2016
Gratiola aurea (golden hedge-hyssop)
Gratiola aurea, Amos Lake in Preston, August 15, 2013

H

Hottonia inflata (American featherfoil)
Hotonia inflata, Hummers Pond in Madison, May 26, 2017
Hydrocotyle umbellata (Dollarweed)

Mount of Hydrocotyle umbellata from Little Pond

Hydrilla verticillata ssp. peregrina (wandering hydrilla)*

Hydrilla verticillata ssp. lithuanica (northern hydrilla)*
Hydrilla verticillata subspecies lithuanica, Amos Lake, 2023.
Hydrocotyle americana (American water pennywort)
Hydrocotyle americana, in cultivation at Exotic Fin and Feather Pet Shop in East Hartford, December 9, 2010
Hydrocotyle species (water pennywort)
Hydrocotyle species, Private Pond in New Haven, May 14, 2010

I

Isoetes acadiensis (Acadian quillwort)
Isoetes acadiensis, Alexander Lake in Killingly, July 27, 2011
Isoetes echinospora (spiny-spored quillwort)
Isoetes echinospora, Lake Chaffee in Ashford, July20, 2009
Isoetes engelmannii (Engelmann's quillwort)
Isoëtes engelmanii, Hidden Lake in Haddam, July 11, 2005
Isoetes species (quillwort species)
Isoetes species, Lake Quassapaug in Middlebury, July 20, 2011
Isoetes tuckermannii (Tuckerman's quillwort)
Isoetes tuckermanii, Black Hall Pond in Old Lyme, August 18, 2005
Isoetes x eatonii (Eaton's quillwort)
Isoëtes X eatonii, Hall's Pond in Eastford, August 1, 2005

J

Juncus militaris (bayonet rush)
Juncus militaris, Middle Quaddick Reservoir in Thompson, September 6, 2017
Juncus pelocarpus (brown-fruited rush)
Juncus pelocarpus, Billings Lake in North Stonington, September 21, 2005
Juncus species (rush species)
Juncus species, Lake Winchester in Winchester, September 20, 2007

L

Lemna minor (common duckweed)
Lemna Minor, Twin Lake North in Simsbury, September 11, 2018
Lemna trisulca (star duckweed)
Lemna trisulca, Quonnipaug Lake in Guilford, July 8, 2010
Limnophila species (marshweed)
Herbarium mount of Limnophila species plant found in pet store
Lindernia dubia (yellowseed false pimpernel)
Lindernia dubia, Crystal Lake in Middletown, September 1, 2009
Lobelia dortmanna (Dortmann's cardinalflower)
Lobelia dortmanna, Cedar Lake in Chester, September 5, 2010
Ludwigia palustris (marsh primrose-willow)
Ludwigia palustris, Deer Lake Reservoir in Killingworth September 14, 2009
Ludwigia species (primrose-willow)
Ludwigia species, Eagleville Lake in Coventry, September 21, 2012
Ludwigia x lacustris (lake ludwigia)
Ludwigia X lacustris, West Lake in Guilford, August 2, 2010

M

Marsilea drummondii (nardoo)
Marsilea drummondii, in cultivation at All Pets Club in Branford December 16, 2010
Marsilea quadrifolia (European waterclover)*
Marsilea quadrifolia, Bunnells Pond in Bridgeport, June 30 2011
Mayaca species (mayaca species)
Mayaca species, in cultivation at Puppy Center and Aquarium in West Hartford, September 10, 2009
Megalodonta beckii (water marigold)
Myriophyllum spicatum, Black Pond in Meriden, June 18, 2015
Myosotis scorpioides (forget-me-not)*
Myosotis scorpioides, Crystal Lake in Middletown, August 25, 2009
Myriophyllum alterniflorum (alternate-flowered watermilfoil)
Myriophyllum alterniflorum, West Side Pond in Goshen, August 29, 2012
Myriophyllum aquaticum (parrotfeather)*
Myriophyllum aquaticum, Dogwood Lake in Trumbull September 29, 2020
Myriophyllum heterophyllum (variable-leaf watermilfoil)*
Myriophyllum heterophyllum, Anderson Pond in North Stonington, August 24, 2012
Myriophyllum humile (low watermilfoil)
Myriophyllum humile Black Pond in Middlefield/Meriden, July 5, 2011
Myriophyllum pinnatum (cutleaf watermilfoil)
Myriophyllum pinnatum, in cultivation at Slither & Swim Pets in West Haven December 14, 2010
Myriophyllum sibiricum (northern watermilfoil)
Myriophyllum sibiricum, Black Pond in Middlefield, June 25, 2004
Myriophyllum species (watermilfoil species)
Myriophyllum species, in cultivation at All Pets Club in Wallingford, August 28, 2009
Myriophyllum spicatum (Eurasian watermilfoil)*
Myriophyllum spicatum, Candlewood Lake in Danbury, August 27, 2015
Myriophyllum tenellum (slender watermilfoil)
Myriophyllum tenellum, Lake Hayward in East Haddam, July 24, 2019
Myriophyllum heterophyllum x laxum (variable watermilfoil hybrid)*
Myriophyllum heterophyllum x M. laxum, Anderson Pond in North Stonington New London, August 12, 2004

N

Najas flexilis (slender naiad)
Najas flexilis, Gorton Pond in East Lyme, July 9, 2015
Najas gracillima (thread-leaf naiad)
Najas gracillima, Beseck Lake in Middlefield, June 27, 2011
Najas guadalupensis (southern naiad)
Najas guadalupensis Black Pond in Woodstock, July 25, 2005
Najas minor (minor naiad)*
Najas Minor in Lake Lillinonah in Newtown, July 10, 2007
Nelumbo lutea (American water lotus)*
Nelumbo lutea, Putnam Park in Eastin, September 26, 2011
Nuphar variegata (yellow water lily)
Nuphar variegata, Middle Bolton Lake in Vernon, July 14, 2020
Nymphaea odorata (white water lily)
Nymphaea odorata, Alexander Lake in Killingly, July 14, 2005
Nymphaea odorata ssp. tuberosa (American white water lily)
Nymphaea odorata ssp. tuberosa in Longmeadow Lake, Bethlehem, July 5. 2005
Nymphoides cordata (little floating heart)
Nymphoides cordata in Messerschmidt Pond, Deep River/Westbrook, August 16, 2005
Nymphoides peltata (yellow floating heart)*
Nymphoides peltata, Williamson Pond in Columbia, August 11, 2008
Nymphoides species (floating heart species)
Nymphoides species in Doaneville Pond, Griswold, July 6, 2011

P

Peltandra virginica (green arrow arum)
Peltandra virginica, Roseland Lake in Woodstock, June 18, 2012
Phragmites australis (phragmites)*
Phragmites australis, Andover Lake in Andover, August 11, 2008
Polygonum amphibium (water smartweed)
Polygonum amphibium, Silver Lake in Berlin/Meriden, July 2, 2008
Polygonum hydropiperoides (swamp smartweed)
Polygonum hydropiperoides, Williamson Pond in Columbia, August 18, 2008
Polygonum species (knotweed species)
Polygonum species, East Haddam, Connecticut River, August 18, 2020
Pontederia cordata (pickerelweed)
Pontederia cordata, Middle Bolton Lake in Vernon, July 14, 2020
Potamogeton amplifolius (large-leaf pondweed)
Potamogeton amplifolius, Pistapaug Pond in Wallingford June 29, 2005
Potamogeton x assidens (Long-leaf pondweed hybrid)
Mount of Potamogeton x assidens from Lake Housatonic

Potamogeton berchtoldii (Berchtold's pondweed)
Potamogeton berchtoldii, Bashan Lake in East Haddam, July 10, 2019
Potamogeton bicupulatus (snailseed pondweed)
Potamogeton bicupulatus, Crystal Lake in Middletown, September 3, 2008
Potamogeton confervoides (Tuckerman's pondweed)
Potamogeton confervoides, Green Falls Reservoir in Voluntown, August 2, 2005
Potamogeton crispus (curlyleaf pondweed)*
Potamogeton crispus, Taunton Lake in Newtown, June 15 2010
Potamogeton epihydrus (Ribbon-leaf pondweed)
Potamogeton epihydrus, Private Pond in Clinton, August 13, 2013
Potamogeton foliosus (leafy pondweed)
Potamogeton foliosus, Bethmour Road Pond in Bethany, September 9, 2009
Potamogeton friesii (Fries' pondweed)
Potamogeton friesii, Lake Wononscopomuc in Salisbury, September 16, 2004
Potamogeton gramineus (variable pondweed)
Potamogeton gramineus, Gardner Lake in Bozrah July 15, 2015
Potamogeton gramineus x nodosus
Potamogeton gramineus x nodosus, Lake Housatonic in Shelton, July 19, 2017
Potamogeton gramineus x praelongus
Potamogeton gramineus x praelongus Lake Zoar in Newtown, August 30 2017
Potamogeton illinoensis (Illinois pondweed)
Potamogeton illinoensis, Indian Lake in Sharon, June 30, 2009
Potamogeton natans (floating-leaf pondweed)
Potamogeton natans, Staffordville Reservoir in Staffordville Springs, September 4, 2019
Potamogeton x nitens (shining pondweed)
Herbarium mount of Potamogeton x nitens, or shining pondweed
Potamogeton nodosus (long-leaf pondweed)
Potamogeton nodosus, Lake Zoar in Monroe, Newtown, Oxford, and Southbury, September 2, 2008
Potamogeton oakesianus (Oakes' pondweed)
Potamogeton oakesianus, Ball Pond in New Fairfield August 17, 2005
Potamogeton obtusifolius (bluntleaf pondweed)
Potamogeton obtusifolius, Hart Pond in Litchfield, September 27, 2013
Potamogeton perfoliatus (clasping-leaf pondweed)
Potamogeton perfoliatus, Lake Beseck in Middlefield, June 22, 2004
Potamogeton praelongus (white stem pondweed)
Potamogeton praelongus, Mudge Pond in Sharon, September 17, 2015
Potamogeton praelongus x illinoensis
Potamogeton praelongus x illinoensis, Tyler Lake in Goshen, August 14, 2011
Potamogeton pulcher (spotted pondweed)
Potamogeton Pulcher, Young Pond in Branford, July 1, 2009
Potamogeton pusillus (small pondweed)
Potamogeton pusillus, Lake Housatonic in Shleton, July 21, 2017
Potamogeton pusillus ssp. gemmiparus
Potamogeton pusillus ssp gemmiparus, Beseck Lake in Middlefield, June 20, 2017
Potamogeton richardsonii (Richardson's pondweed)
Potamogeton richardsonii, Indian Lake in Sharon, June 29, 2009
Potamogeton robbinsii (Robbins' pondweed)
Potamogeton robbinsii, Amos Lake in Preston, August 24, 2018
Potamogeton species (pondweed species)
Potamogeton species, Connecticut River, Enfield, August 19, 2020
Potamogeton spirillus (spiral pondweed)
Potamogeton spirillus, Tyler Lake in Goshen, August 30, 2013
Potamogeton vaseyi (Vasey's pondweed)
Potamogeton vaseyi, Bashan Lake in East Haddam, July 10, 2019
Potamogeton zosteriformis (flat-stemmed pondweed)
Potamogeton zosteriformis, Lake Zoar in Southbury, September 3, 2015
Proserpinaca palustris (marsh mermaid weed)
Proserpinaca palustris, Staffordville Reservoir in Stafford Springs, September 5, 2019

R

Ranunculus longirostris (white water crowfoot)
Ranunculus longirostris, Mudge Pond in Sharon, September 22, 2015
Rorippa microphylla (one-rowed watercress)
Rorippa microphylla, Private Pond in New Haven, May 14, 2010

S

Sagittaria cuneata (arumleaf arrowhead)
Sagittaria cuneata, Lake Zoar in Southbury, Monroe, Newtown, and Oxford, August 29, 2007
Sagittaria engelmanniana (Engelmann's arrowhead)
Sagittaria engelmanniana, Connecticut River in Middletown, August 18, 2020
Sagittaria filiformis (narrow-leaved arrowhead)
Sagittaria filiformis, Connecticut River in Enfield, August 19, 2020
Sagittaria graminea (grassy arrowhead)
Sagittaria graminea, Lake Lillinonah in Newtown, July 27, 2007
Sagittaria latifolia (broadleaf arrowhead)
Sagittaria latifolia, Bassermann Pond in Branford, June 25, 2009
Sagittaria species (arrowhead species)
Sagittaria species, Connecticut River in Haddam, September 25, 2019
Salvinia minima (water spangles)
Salvinia minima, in cultivation at Petsmart in Waterbury, September 10, 2009
Schoenoplectus species (bulrush)
Schoenoplectus species, Indian Lake in Sharon, June 29, 2009
Schoenoplectus tabernaemontani (great bulrush)
Schoenoplectus tabernaemontani, Town Mill Pond in Guilford, July 30, 2009
Sparganium americanum (American bur-reed)
Sparganium americanum, Bissonnette Pond in Willington, August 28, 2006
Sparganium species (bur-reed species)
Sparganium species, Dogwood Lake in Trumbull, September 29, 2020
Spirodela polyrhiza (great duckweed)
Spirodela polyrhiza, Phipps Lake in West Haven, June 6, 2018
Stuckenia pectinatus (sago pondweed)
Stuckenia pectinata, Candlewood Lake in Brookfield September 3, 2016

T

Trapa natans (water chestnut)*
Trapa natans, Private Pond in Berlin, August 21, 2015

U

Utricularia geminiscapa (hiddenfruit bladderwort)
Utricularia geminiscapa, West Lake in Guilford, August 2, 2010
Utricularia gibba (humped bladderwort)
Utricularia gibba, Gorton Pond in East Lyme, July 9, 2015
Utricularia inflata (swollen bladderwort)*
Swollen bladderwort mount from Bashan Lake
Utricularia intermedia (flat-leaf bladderwort)
Utricularia intermedia, Staffordville Reservoir in Stafford Springs, September 4, 2019
Utricularia vulgaris (formerly macrorhiza) (common bladderwort)
Utricularia macrorhiza, Chalkers Mill Pond in Old Saybrook, July 22, 2005
Utricularia minor (lesser bladderwort)
Utricularia minor, Uncas Lake in Lyme, July 7, 2015
Utricularia purpurea (purple bladderwort)
Utricularia purpurea, Lower Moodus Reservoir in East Haddam, July 7, 2009
Utricularia radiata (floating bladderwort)
Utricularia radiata, Private pond in Clinton, August 13, 2013
Unidentified species
Unidentified species, Buckley Pond in Union, July 23, 2020
Utricularia species (bladderwort species)
Utricularia species, Lake Hayward in East Haddam, July 24, 2019

V

Vallisneria americana (eelgrass)
Vallisneria americana, Uncas Lake in Lyme, July 8, 2015

W

Wolffia brasiliensis (Brazilian watermeal)
Wolffia brasiliensis, Mackenzie Reservoir in Wallingford, June 30, 2005

Z

Zannichellia palustris (horned pondweed)
Zannichellia palistris, Connecticut River, Lyme, September 28, 2019
Zosterella dubia (water stargrass)
Zosterella dubia, Lake Zoar in Newtown, September 6, 2013