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 Species 
A

Alisma species Alisma subcordatum Azolla species
Water Plantain American water plantain Mosquitofern
Water plantain, Beseck Lake, June 26, 2017 Mosquitofern, Private Pond West, Suffield, September 4, 2012

B

Bacopa species Brasenia schreberi
Water hyssop Watershield
Water Hyssop, All Pets Club, August 27, 2009  Watershield, Brasenia schreberi

C

Cabomba caroliniana* Callitriche heterophylla  Callitriche species 
Fanwort Great water starwort Water starwort
Fanwort, Anderson Pond, August 23, 2012 Callitriche heterophylla, Red Wing Pond, July 13, 2009 Callitriche species, Bushy Pond, June 05, 2019

Callitriche stagnalis* Callitriche verna  Cardamine species 

Pond water starwort Vernal water starwort Bittercress Callitriche stagnalis, Red Wing Pond, July 13, 2009  Callitriche verna, Lake Lillinonah, July 27, 2007 Cardamine species, Crystal Pond, July 14, 2009
Ceratophyllum demersum Ceratophyllum echinatum

Coontail Spineless hornwort Ceratophyllym demersum, Coventry Lake, July 09, 2008 Ceratophyllum echinatum, Upper Moodus Reservoir, July 14, 2016

D

Decodon verticillatus
Swamp loosestrife
Decodon verticillatus, Bushy Pond, June 05, 2019

E

Egeria densa* Egeria najas Eichhornia crassipes*
Brazilian waterweed Narrowleaf anacharis Common water hyacinth
Egeria densa, Dogwood Lake in Trumbull, September 29, 2020 Egeria najas in Branford, August 21, 2009 Eichhornia crassipes Mill Pond Park in Newington, September 4, 2009

Elatine americana Elatine minima Elatine species
American waterwort Small waterwort Waterwort
Elatine americana Beaver Dam Lake in Stratford July 22, 2009 Elatine minima, Lower Moodus Reservoir in East Haddam July 08, 2009 Elatine species, Fence Rock Lake in Guilford, August 3, 2017

Elatine triandra Eleocharis acicularis Eleocharis elliptica
Longstem waterwort Needle spikerush Elliptic spikerush
Elatine triandra, Candlewood Lake in Brookfield, Danbury, New Fairfield, New Milford, and Sherman, September 12, 2008 Eleocharis acicularis, Lake Lillinonah in Newtown, August 11, 2011 Eleocharis elliptica, Oakwood Pond in Guilford, July 14, 2006

Eleocharis parvula Eleocharis species Elodea canadensis
Dwarf spikerush Spikerush Canadian waterweed
Eleocharis parvula, Canoe Brook Lake in Trumbull, August 18, 2004 Eleocharis species, Fence Rock Lake in Guilford, August 3, 2017 Elodea canadensis, Indian Lake in Sharon, June 29, 2009
Elodea nuttallii Eriocaulon aquaticum
Western waterweed Sevenangle pipewort
Elodea nuttalii, Crystal Lake in Middletown, September 2, 2008 Eriocaulon aquaticum, Lake Hayward in East Haddam, August 22, 2013

G

Galium palustre Glossostigma cleistanthum Gratiola aurea
Marsh bedstraw Mudmat Golden hedge-hyssop
Galium palustre, Private Pond in Stonington, May 18, 2017 Glossostigma cleistanthum, Bashan Lake in East Haddam, October 5, 2016 Gratiola aurea, Amos Lake in Preston, August 15, 2013

H

Hottonia inflata Hydrilla verticillata* Hydrocotyle americana
American featherfoil Hydrilla American water pennywort
Hotonia inflata, Hummers Pond in Madison, May 26, 2017 Hydrilla verticillata, Connecticut River, Haddam, October 1, 2018 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 Isoetes echinospora Isoetes engelmannii
Acadian quillwort Spiny-spored quillwort Engelmann's quillwort
Isoetes acadiensis, Alexander Lake in Killingly, July 27, 2011 Isoetes echinospora, Lake Chaffee in Ashford, July20, 2009 Isoëtes engelmanii, Hidden Lake in Haddam, July 11, 2005

Isoetes species Isoetes tuckermannii Isoetes x eatonii
Quillwort Tuckerman's quillwort Eaton's quillwort
Isoetes species, Lake Quassapaug in Middlebury, July 20, 2011 Isoetes tuckermanii, Black Hall Pond in Old Lyme, August 18, 2005 Isoëtes X eatonii, Hall's Pond in Eastford, August 1, 2005

J

Juncus militaris Juncus pelocarpus Juncus species
Bayonet rush Brown-fruited rush Rush
Juncus militaris, Middle Quaddick Reservoir in Thompson, September 6, 2017 Juncus pelocarpus, Billings Lake in North Stonington, September 21, 2005 Juncus species, Lake Winchester in Winchester, September 20, 2007

L

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

M

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

N

Najas flexilis Najas gracillima Najas guadalupensis
Slender naiad Thread-leaf naiad Southern naiad
Najas flexilis, Gorton Pond in East Lyme, July 9, 2015 Najas gracillima, Beseck Lake in Middlefield, June 27, 2011 Najas guadalupensis Black Pond in Woodstock, July 25, 2005
Najas minor* Nelumbo lutea* Nuphar microphylla
Brittle waternymph American lotus Small-leaved pond lily
Najas Minor in Lake Lillinonah in Newtown, July 10, 2007 Nelumbo lutea, Putnam Park in Eastin, September 26, 2011 Nuphar microphylla, Pachaug Pond in Griswold, September 10, 2017
Nuphar variegata Nymphaea odorata Nymphaea odorata ssp. tuberosa
Yellow water lily White water lily American white water lily
Nuphar variegata, Middle Bolton Lake in Vernon, July 14, 2020 Nymphaea odorata, Alexander Lake in Killingly, July 14, 2005 Nymphaea odorata ssp. tuberosa in Longmeadow Lake, Bethlehem, July 5. 2005
Nymphoides cordata Nymphoides peltata* Nymphoides species
Little floating heart Yellow floating heart Floating heart
Nymphoides cordata in Messerschmidt Pond, Deep River/Westbrook, August 16, 2005 Nymphoides peltata, Williamson Pond in Columbia, August 11, 2008 Nymphoides species in Doaneville Pond, Griswold, July 6, 2011

P

Peltandra virginica Phragmites australis* Polygonum amphibium
Green arrow arum Phragmites Water smartweed
Peltandra virginica, Roseland Lake in Woodstock, June 18, 2012 Phragmites australis, Andover Lake in Andover, August 11, 2008 Polygonum amphibium, Silver Lake in Berlin/Meriden, July 2, 2008

Polygonum hydropiperoides Polygonum species Pontederia cordata
Swamp smartweed Knotweed Pickerelweed
Polygonum hydropiperoides, Williamson Pond in Columbia, August 18, 2008 Polygonum species, East Haddam, Connecticut River, August 18, 2020 Pontederia cordata, Middle Bolton Lake in Vernon, July 14, 2020
Potamogeton amplifolius Potamogeton berchtoldii Potamogeton bicupulatus
Large-leaf pondweed Berchtold's pondweed Snailseed pondweed
Potamogeton amplifolius, Pistapaug Pond in Wallingford June 29, 2005 Potamogeton berchtoldii, Bashan Lake in East Haddam, July 10, 2019 Potamogeton bicupulatus, Crystal Lake in Middletown, September 3, 2008
Potamogeton confervoides Potamogeton crispus* Potamogeton epihydrus
Tuckerman's pondweed Curlyleaf pondweed Ribbon-leaf pondweed
Potamogeton confervoides, Green Falls Reservoir in Voluntown, August 2, 2005 Potamogeton crispus, Taunton Lake in Newtown, June 15 2010 Potamogeton epihydrus, Private Pond in Clinton, August 13, 2013
Potamogeton foliosus Potamogeton friesii Potamogeton gramineus
Leafy pondweed Fries' pondweed Variable pondweed
Potamogeton foliosus, Bethmour Road Pond in Bethany, September 9, 2009 Potamogeton friesii, Lake Wononscopomuc in Salisbury, September 16, 2004 Potamogeton gramineus, Gardner Lake in Bozrah July 15, 2015
Potamogeton gramineus x Potamogeton gramineus x Potamogeton illinoensis
nodosus praelongus Illinois pondweed
Potamogeton gramineus x nodosus, Lake Housatonic in Shelton, July 19, 2017 Potamogeton gramineus x praelongus Lake Zoar in Newtown, August 30 2017 Potamogeton illinoensis, Indian Lake in Sharon, June 30, 2009
Potamogeton natans  Potamogeton x nitens Potamogeton nodosus
Floating-leaf pondweed Shining pondweed Long-leaf pondweed
Potamogeton natans, Staffordville Reservoir in Staffordville Springs, September 4, 2019 Herbarium mount of Potamogeton x nitens, or shining pondweed Potamogeton nodosus, Lake Zoar in Monroe, Newtown, Oxford, and Southbury, September 2, 2008
Potamogeton oakesianus Potamogeton obtusifolius Potamogeton perfoliatus
Oakes' pondweed Bluntleaf pondweed Clasping-leaf pondweed
Potamogeton oakesianus, Ball Pond in New Fairfield August 17, 2005 Potamogeton obtusifolius, Hart Pond in Litchfield, September 27, 2013 Potamogeton perfoliatus, Lake Beseck in Middlefield, June 22, 2004
Potamogeton praelongus Potamogeton praelongus x Potamogeton pulcher
White stem pondweed illinoensis Spotted pondweed
Potamogeton praelongus, Mudge Pond in Sharon, September 17, 2015 Potamogeton praelongus x illinoensis, Tyler Lake in Goshen, August 14, 2011 Potamogeton Pulcher, Young Pond in Branford, July 1, 2009
Potamogeton pusillus Potamogeton pusillus Potamogeton richardsonii
Small pondweed ssp. gemmiparus Richardson's pondweed
Potamogeton pusillus, Lake Housatonic in Shleton, July 21, 2017 Potamogeton pusillus ssp gemmiparus, Beseck Lake in Middlefield, June 20, 2017 Potamogeton richardsonii, Indian Lake in Sharon, June 29, 2009
Potamogeton robbinsii Potamogeton species Potamogeton spirillus
Robbins' pondweed Pondweed Spiral pondweed
Potamogeton robbinsii, Amos Lake in Preston, August 24, 2018 Potamogeton species, Connecticut River, Enfield, August 19, 2020 Potamogeton spirillus, Tyler Lake in Goshen, August 30, 2013
Potamogeton vaseyi Potamogeton zosteriformis Proserpinaca palustris
Vasey's pondweed Flat-stemmed pondweed Marsh mermaid weed
Potamogeton vaseyi, Bashan Lake in East Haddam, July 10, 2019 Potamogeton zosteriformis, Lake Zoar in Southbury, September 3, 2015 Proserpinaca palustris, Staffordville Reservoir in Stafford Springs, September 5, 2019

R

Ranunculus longirostris Rorippa microphylla
White water crowfoot One-rowed watercress
Ranunculus longirostris, Mudge Pond in Sharon, September 22, 2015 Rorippa microphylla, Private Pond in New Haven, May 14, 2010

S

Sagittaria cuneata Sagittaria engelmanniana Sagittaria filiformis
Arumleaf arrowhead Engelmann's arrowhead Narrow-leaved arrowhead
Sagittaria cuneata, Lake Zoar in Southbury, Monroe, Newtown, and Oxford, August 29, 2007 Sagittaria engelmanniana, Connecticut River in Middletown, August 18, 2020 Sagittaria filiformis, Connecticut River in Enfield, August 19, 2020
Sagittaria graminea Sagittaria latifolia Sagittaria species
Grassy arrowhead Broadleaf arrowhead Arrowhead
Sagittaria graminea, Lake Lillinonah in Newtown, July 27, 2007 Sagittaria latifolia, Bassermann Pond in Branford, June 25, 2009 Sagittaria species, Connecticut River in Haddam, September 25, 2019
Salvinia minima Schoenoplectus species Schoenoplectus tabernaemontani
Water spangles Bulrush Great bulrush
Salvinia minima, in cultivation at Petsmart in Waterbury, September 10, 2009 Schoenoplectus species, Indian Lake in Sharon, June 29, 2009 Schoenoplectus tabernaemontani, Town Mill Pond in Guilford, July 30, 2009
Sparganium americanum Sparganium species Spirodela polyrhiza
American bur-reed Bur-reed Great duckweed
Sparganium americanum, Bissonnette Pond in Willington, August 28, 2006 Sparganium species, Dogwood Lake in Trumbull, September 29, 2020 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 Utricularia gibba Utricularia inflata*
Hiddenfruit bladderwort Humped bladderwort Swollen bladderwort
Utricularia geminiscapa, West Lake in Guilford, August 2, 2010 Utricularia gibba, Gorton Pond in East Lyme, July 9, 2015 Swollen bladderwort mount from Bashan Lake
Utricularia intermedia Utricularia macrorhiza (vulgaris) Utricularia minor
Flat-leaf bladderwort Common bladderwort Lesser bladderwort
Utricularia intermedia, Staffordville Reservoir in Stafford Springs, September 4, 2019 Utricularia macrorhiza, Chalkers Mill Pond in Old Saybrook, July 22, 2005 Utricularia minor, Uncas Lake in Lyme, July 7, 2015
Utricularia purpurea Utricularia radiata Unidentified species
Purple bladderwort Floating bladderwort Utricularia purpurea, Lower Moodus Reservoir in East Haddam, July 7, 2009 Utricularia radiata, Private pond in Clinton, August 13, 2013 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 Zosterella dubia
Horned pondweed Water stargrass
Zannichellia palistris, Connecticut River, Lyme, September 28, 2019 Zosterella dubia, Lake Zoar in Newtown, September 6, 2013