Flora of New York/Acorales & Alismatales


Nymphaeales & magnoliids
Flora of New York — Acorales & Alismatales
Dioscoreales & Liliales
Table of
contents
Genus
index
Protected species index Invasive species index


Order Family Subfamily Tribe Genus Common name(s) #
Acorales Acoraceae Acorus sweetflag 2
Alismatales Araceae Orontioideae Orontieae Orontium goldenclub 1
Symplocarpeae Symplocarpus skunk cabbage 1
Lemnoideae Spirodela duckmeat 1
Lemna duckweed 5
Wolffia watermeal 3
Aroideae Calleae Calla callalily 1
Peltandreae Peltandra arrow-arum 1
Arisaemateae Arisaema Jack-in-the-pulpit 5
Pinellia pinellia 1
Pistieae Pistia water-lettuce 1
Tofieldiaceae Triantha tofieldia, false asphodel 1
Hydrocharitaceae Hydrocharitoideae Egeria waterweed 1
Hydrocharis frogbit 1
Limnobium spongeplant 1
Anacharidoideae Elodea waterweed 3
Hydrilloideae Najas waternymph, naiad 8
Hydrilla water-thyme 1
Vallisneria eelgrass 1
Butomaceae Butomus flowering rush 1
Alismataceae Sagittaria arrowhead 9
Alisma water-plantiain 12
Helanthium burhead 1
Scheuchzeriaceae Scheuchzeria rannoch-rush 1
Juncaginaceae Juncaginoideae Triglochin arrowgrass 2
Ruppiaceae Ruppia ditch-grass 1
Zosteraceae Zostera eelgrass 1
Potamogetonaceae Potamogetoneae Potamogeton pondweed 36
Stuckenia fineleaf pondweed 2
Zannichellieae Zannichellia horned pondweed 1

Order AcoralesEdit

The order Acorales consists of only the Acoraceae (sweetflag family), with Acorus as its only genus.[1]

Family AcoraceaeEdit

AcorusEdit

Acorales — Acoraceae — Acorus
Acorus Sweetflag N.Y. Status Images Distribution NY NPT
 (Raf.) Raf.

1828. Acorus calamus var. americanus
1836. Acorus americanus (Raf.) Raf.
1954. Acorus calamus var. americanus
 auct. Acorus calamusnon L.
American sweet-flag,
American sweetflag,
Several-veined sweetflag,
Sweetflag
Acore d'Amérique,
Acorus d'Amérique,
Belle-angélique
Native, C:5,
Secure,
Fertile diploid
 (2n = 2x = 24)

OBL

Perennial,
Herb-forb,
Sun
  NYFA-5
USDA-N
NPT Can
ARS ITIS
FNA Trop.
NSE BNA
LBJ

Images, wsp
 L.

1753. Acorus calamus L.
Old World sweet-flag,
European sweetflag,
Single-veined sweetflag,
Flag-root,
Myrtle flag
Acore roseau,
Acorus roseau,
Acore aromatique,
Belle-angélique
Introduced from
 Asia,
Sterile triploid
 (2n = 3x = 36)

OBL

Perennial,
Herb-forb,
Sun
  NYFA-X
USDA-X
NPT Can
ARS ITIS
FNA Trop.
NSE BNA


Images, wsp

Order AlismatalesEdit

The order Alismatales as defined in the Angiosperm Phylogeny Website.[1]

Family AraceaeEdit

The plants of the Araceae (arum family) have numerous small flowers that are part of a spadix, a spike inflorescence on which the flowers are borne on a fleshy stem. The spadix is usually surrounded by a bract called a spathe.

Subfamily OrontioideaeEdit

The Orontioideae contains just two New York species, both native: Orontium aquaticum (golden club) and Symplocarpus foetidus (eastern skunk cabbage). This subfamily also includes the genus Lysichiton which comprises the western and Asian skunk cabbages, neither of which are know to have naturalized in New York.

OrontiumEdit

 
Orontium aquaticum
golden club
Orontium aquaticum (golden club), the only living species of its grenus, probably reaches the northern extent of its range in New York and adjacent New England. It is considered to be threatened in New York, where it is mostly found in Hudson River tidal marshes but has been reported in acidic bogs and ponds farther inland.
Alismatales — Araceae — Orontioideae — Orontieae
Orontium Goldenclub N.Y. Status Images Distribution NY NPT
L.

1753. Orontium aquaticum L.
1895. Aronia aquatica (L.) Baill.
Golden club Native, C:9,
Threatened,
NYNHP: 2[1]

OBL

Perennial,
Herb-forb,
Part shade
  NYFA-2
USDA-N0

ARS 
Trop.
BNA
LBJ

Images, wsp

SymplocarpusEdit

 
Symplocarpus foetidus
skunk cabbage
Skunk cabbage (Symplocarpus foetidus) is the only North American native of the genus. The western skunk cabbage is in the genus Lysichiton and has not been reported to have naturalized in New York.
Alismatales — Araceae — Orontioideae — Symplocarpeae
Symplocarpus Skunk-cabbage N.Y. Status Images Distribution NY NPT
 (L.) W.Salisb.

1753. Dracontium foetidum L.
1808. Spathyema foetida (L.) Raf. nom. inval.
1812. Symplocarpus foetidus (L.) W.Salisb.
1817. S. foetidus (L.) Salisb. ex W.P.C.Barton
Skunk cabbage,
Polecatweed
Chou puant,
Tabac-du-diable
Native, C:5,
Secure

OBL

Perennial,
Herb-forb,
Shade
  NYFA-5
USDA-NN

ARS 
FNA Trop.

LBJ

Images, wsp

Subfamily LemnoideaeEdit

 
Duckweeds:
Spirodela polyrhiza (large),
Lemna minor (medium),
Wolffia arrhiza (small).
The Lemnoideae contains the small aquatic plants known as duckweeds, or water lentils. This subfamily contains plants previously placed in the Lemnaceae.

SpirodelaEdit

 
Spirodela polyrrhiza - common duck-meat
Common duck-meat (Spirodela polyrrhiza)
Alismatales — Araceae — Lemnoideae — Spirodela
Spirodela Duckmeat N.Y. Status Images Distribution NY NPT
 (L.) Schleid.

1753. Lemna polyrhiza L.
1839. Spirodela polyrhiza Schleid.
1839. Spirodela polyrrhiza Schleid.
[1]
Common water-flaxseed,
Common duck-meal,
Common duck-meat,
Greater duckweed,
Giant duckweed
Spirodèle polyrhize
Native,
Secure

OBL

Perennial,
Herb-forb
  NYFA-5
USDA-NN
NPT Can
ARS ITIS
FNA Trop.
NSE BNA


Images, wsp
  1. "The initial ρ of a Greek word transliterated as rh, e.g. rhiza (ριζα, root, rhizome), should have an additional r added to it when preceded by a vowel, e.g. Glycyrrhiza (γλυκυρριζα, liquorice, from γλυκος, sweet, ριζα, root), leptorrhiza (λεπτορριζα, with a thin root, from λεπτος, small, slender), but as many reputable authors, Linnaeus among them, have omitted this additional r, it is best regarded as optional and an author's original spelling, as in Lemna polyrhiza, should be accepted." - W. T. Stearn (1992), Botanical Latin ed. 4: 261.

LemnaEdit

Alismatales — Araceae — Lemnoideae — Lemna
Lemna Duckweed N.Y. Status Images Distribution NY NPT
 L.

    L. cyclostasa Ell. ex Schleid.
    L. minima Chev. ex Schleid.
Lesser duckweed Native, C:2,
Secure
  NYFA-5
USDA-NN
NPT 





Images, wsp
 L.

Star duckweed Native, C:4,
Secure
  NYFA-5
USDA-NN
NPT 





Images, wsp
 Torr.

Minute duckweed Native, C:4,
Endangered,
NYNHP: 1[1]
  NYFA-1
USDA-NN
NPT 





Images, wsp
 Phil.

Pale duckweed,
Valdivia duckweed
Native, C:10,
Endangered,
NYNHP: 1[2]
  NYFA-1
USDA-NN
NPT 





Images, wsp
 Landolt

Turion duckweed,
Lenticulare turionifère
Native, C:4,
Unranked

OBL
  NYFA-U
USDA-NN
NPT 
ITIS




Images, wsp
Lemna (excluded species) Duckweed N.Y. Status Images Distribution NY NPT
L.

    Lemna gibba L.
    
    
Swollen duckweed N. America native,
N.Y. excluded
  NYFA-XCLD
USDA-N0






Images, wsp
 (Austin) Daubs

    L. minor var. obscura
    
    
Little duckweed N. America native,
N.Y. excluded
  NYFA-XCLD
USDA-N0

ARS 




Images, wsp

WolffiaEdit

 
Wolffia columbiana - Columbian watermeal
The genus Wolffia (watermeal) contains the world's smallest flowering plants, each an undifferentiated, rootless floating body. These species are often found in mixed populations in still ponds, lakes, and marshes in various parts of the state.
Alismatales — Araceae — Lemnoideae — Wolffia
WolffiaHorkel ex Schleiden Watermeal N.Y. Status Images Distribution NY NPT
 H.Karst.

1865. Wolffia columbiana H.Karst
1892. Grantia columbiana (H.Karst.) MacMill.
1912. Bruniera columbiana (H.Karst.) Nieuwl.
Columbian watermeal,
Columbia watermeal,
Columbian duckmeal
Wolffie de Colombie
Native,
Secure
  NYFA-5
USDA-NN
NPT Can





Images, wsp
 (Engelm.) Landolt & Wildi
ex Gandhi, Wiersema & Brouillet

1867. W. brasiliensis var. borealis Engelm.
1977. Wolffia borealis Landolt & … nom. inval.
2012. Wolffia borealis … ex Ghandhi, …
 auctWolffia punctata
Dotted watermeal,
Northern watermeal,
Northern duckmeal
Wolffie borèle
Native,
Likely secure
  NYFA-4
USDA-NN
NPT 
ARS ITIS
FNA Trop.



Images, wsp
 Wedd.

    Bruniera punctata
    Wolffia punctata Griseb.
    Wolffia papulifera
Brazilian watermeal Native,
Likely secure
  NYFA-4
USDA-N0
NPT 
ARS ITIS
FNA 



Images, wsp

Subfamily AroideaeEdit

Tribe CalleaeEdit

CallaEdit
 
Calla palustris - water arum
Calla palustris is the sole species of the genus and is native to cool wetlands of the Northern Hemisphere, including those in New York State.
Alismatales — Araceae — Aroideae — Calleae
Calla Callalily N.Y. Status Images Distribution NY NPT
 L.

1753. Calla palustris L.
Wild calla,
Water arum
Calla des marais
Native,
Secure

OBL

Perennial,
Herb-forb
  NYFA-5
USDA-NN
NPT Can
ARS ITIS
FNA 



Images, wsp

Tribe PeltandreaeEdit

PeltandraEdit
 
Peltandra virginica
green arrow arum, tuckahoe

Alismatales — Araceae — Aroideae — Peltandreae
Peltandra Arrow-arum N.Y. Status Images Distribution NY NPT

Green arrow arum,
Green arrow-arum,
Arrow arum,
Poison arum,
Tuckahoe
Native,
Secure

OBL

Perennial,
Herb-forb
  NYFA-5
USDA-NN
NPT 
ARS 

BNA


Images, wsp

Tribe ArisaemateaeEdit

The Arisaemateae includes two genera that can be found in New York: Arisaema and Pinellia. These include the plants known as Jack-in-the-pulpit and green dragon.
ArisaemaEdit
 
Arisaema triphyllum.
Jack-in-the-pulpit
Two species of Arisaema are native to New York: A. triphyllum (Jack-in-the-Pulpit) and A. dracontium (Green dragon).

Three subspecies of Jack-in-the-Pulpit have been reported in New York. A. triphyllum ssp. triphyllum, a tetraploid with 2n:56 chromosomes, likely originated as a hybrid of subspecies stewardsonii and pusillum, each of which is a diploid with 2n:28 chromosomes.[1]


Alismatales — Araceae — Aroideae — Arisaemateae — Arisaema
ArisaemaMart.sect. Pedatisecta[1] Jack-in-the-pulpit N.Y. Status Images Distribution NY NPT
 (L.) Schott
ssp. triphyllum

1753. Arum triphyllum L.
1832. Arisaema triphyllum (L.) Schott
1835. Arisaema atrorubens (Aiton) Blume
Common Jack-in-the-pulpit,
Indian Jack-in-the-pulpit,
Indian-turnip
Arisème petit-prêcheur
Native,
Secure

FAC
  NYFA-5
USDA-N
NPT Can

FNA Trop.



Images, wsp
ssp. stewardsonii (Britton) Huttl.

1901. Arisaema stewardsonii Britton
1910. A. triphyllum var. stewardsonii Stevens
1920. A. triphyllum fo. stewardsonii Engl.
1949. A. triphyllum ssp. stewardsonii Huttl.
Swamp Jack-in-the-pulpit,
Stewardson's Jack...
Arisème de Stewardson,
Arisèma de Stewardson
Native,
Secure

FAC
  NYFA-5
USDA-N
Can

FNA Trop.



Images, wsp

ssp. stewardsonii ×
ssp. triphyllum

Hybrid of
 Swamp Jack-in-the-pulpit &
 Common Jack-in-the-pulpit

Native,
Unknown

FAC
  NYFA-U






Images, wsp
ssp. pusillum (Peck) Huttl.

1898. A. triphyllum var. pusillum Peck
1901. Arisaema pusillum (Peck) Nash
1903. Arisaema acuminatum Small
1921. A. triphyllum var. acuminatum Engl.
1940. A. triphyllum fo. pusillum Fernald
1949. A. triphyllum ssp. pusillum Huttl.
Small jack-in-the-pulpit,
Peck's jack-in-the-pulpit
Arisème nain
Native,
Vulnerable
  NYFA-3
USDA-N
Can

FNA Trop.



Images, wsp
ArisaemaMart.sect. Tortuosa[1] Green-dragon N.Y. Status Images Distribution NY NPT
 (L.) Schott

1753. Arum dracontium L.
1832. Arisaema dracontium (L.) Schott
1903. Muricauda dracontium (L.) Small
Green dragon,
Dragon root,
Dragon arum
Arisème dragon,
Arisèma dragon
Native,
Likely secure
  NYFA-4
USDA-NN
NPT Can
ARS 
FNA Trop.



Images, wsp
PinelliaEdit
Alismatales — Araceae — Aroideae — Arisaemateae — Pinellia
Pinellia Pinellia N.Y. Status Images Distribution NY NPT
 (Thunb.) Makino

Crowdipper,
Asian green dragon
Introduced from
 eastern Asia
  NYFA-X






Images, wsp

Tribe PistieaeEdit

AraceaeEdit
Alismatales — Araceae — Aroideae — Pistieae
Pistia Water-lettuce N.Y. Status Images Distribution NY NPT
 L.

1753. Pistia stratiotes L.
1803. Pistia spathulata Michx.
1878. Pistia stratiotes var. spathulata
Engl.
Water-lettuce,
Tropical duckweed,
Nile cabbage
Laitue d'eau
Introduced from
 US South,
 South America,
 Africa,
Potentially invasive,
NYIS: 62%[1],
Impersistent
  NYFA-X
USDA-N0
Can
ARS ITIS
Trop.



Images, wsp

Family TofieldiaceaeEdit

TrianthaEdit

Alismatales — Tofieldiaceae
Triantha Tofieldia N.Y. Status Images Distribution NY NPT
 (Michx.) Baker

Sticky false-asphodel Native,
Endangered
  NYFA-1
USDA-NN
NPT 



LBJ

Images, wsp

Family AlismataceaeEdit

The Alismataceae (water-plantain family) has about a dozen documented taxa in three genera growing outside of cultivation in New York.

SagittariaEdit

 
Sagittaria latifolia
broad-leaved arrowhead

Alismatales — Alismataceae — Sagittaria
Sagittaria Arrowhead N.Y. Status Images Distribution NY NPT

Broad-leaved arrowhead,
Wapato,
Common arrowhead,
Duck-potato
Native, C:3,
Secure

OBL

Perennial,
Herb-forb
  NYFA-5
USDA-N
NPT 





Images, wsp

Sessile-fruited arrowhead Native, C:6,
Secure

OBL

Perennial,
Herb-forb
  NYFA-5
USDA-N
NPT 





Images, wsp
ssp. graminea

Grass-leaved arrowhead Native, C:8,
Secure

OBL

Perennial,
Herb-forb
  NYFA-5
USDA-N
NPT 





Images, wsp

Northern arrowhead,
Wapato,
Wapatum arrowhead
Native, C:6,
Secure

OBL

Perennial,
Herb-forb
  NYFA-5
USDA-NN
NPT 





Images, wsp

Acid-water arrowhead,
Engelmann arrowhead
Native, C:9,
Likely secure

OBL

Perennial,
Herb-forb
  NYFA-4
USDA-N
NPT 





Images, wsp

Strap-leaved arrowhead Native, C:7,
Rare

OBL

Perennial,
Herb-forb
  NYFA-3
USDA-N
NPT 





Images, wsp
ssp. spongiosa

    Lophotocarpus spathulatus
    Lophotocarpus spongiosus
    Sagittaria spathulata
    S. calycina var. spongiosa
Spongy-leaved arrowhead,
Tidal arrowhead,
Spongy arrowhead,
Hooded arrowhead
Native, C:7,
Threatened

OBL

Annual,
Herb-forb
  NYFA-2
USDA-N
NPT 

FNA 



Images, wsp

Slender arrowhead,
Quill-leaved sagittaria
Native, C:10,
Endangered

OBL

Perennial,
Herb-forb
  NYFA-1
USDA-N
NPT 

FNA 



Images, wsp
Sagittaria (excluded species) Arrowhead N.Y. Status Images Distribution NY NPT
(J.G.Sm.) Small

1897. S. longirostra var. australis
1903. S. australis (J.G.Sm.) Small
 auct. S. engelmanniana ssp. longirostra
 auct. S. longirostranon J.G.Sm.
Longbeak arrowhead,
Appalachian arrowhead
N. America native,
N.Y. excluded
  NYFA-XCLD
USDA-N
NPT 
ARS 
FNA Trop.



Images, wsp

AlismaEdit

Alismatales — Alismataceae — Alisma
Alisma Water-plantain N.Y. Status Images Distribution NY NPT

    
    
    
Southern water-plantain,
Broad-leaved water-plantain
Native, C:4,
Secure

OBL

Perennial,
Herb-forb
  NYFA-5
USDA-N
NPT 





Images, wsp
Pursh

    Alisma triviale Pursh
    A. plantago-aquatica L. misappl.
Northern water-plantain Native, C:4,
Secure

OBL

Perennial,
Herb-forb
  NYFA-5
USDA-N
NPT 





Images, wsp
Lej.

    
    
    
Narrow-leaved water-plantain,
Grass-leaved water-plantain,
Ribbonleaf water-plantain
Native, C:7,
Threatened

OBL

Perennial,
Herb-forb
  NYFA-2-3
USDA-N
NPT 





Images, wsp
Note: [1]

HelanthiumEdit

Alismatales — Alismataceae — Helanthium
Helanthium Burhead N.Y. Status Images Distribution NY NPT
(Mart. ex Schult.f.) Britton

1830. Alisma tenellum Mart. ex Schult.f.
1856. Echinodorus parvulus Engelm.
1868. Echinodorus tenellus Buchenau
1905. Helanthium tenellum Britton
North American
  dwarf burhead,
Mud-babies,
Pygmy chain sword
Native,
Likely extirpated
  NYFA-Z
USDA-NN
NPT 
ARS ITIS
FNA Trop.



Images, wsp

Family ButomaceaeEdit

ButomusEdit

 
Butomus umbellatus
flowering rush
The sole species of Butomaceae (the flowering rush family) is the aquatic Eurasian plant Butomus umbellatus, which is listed as moderately invasive in New York. Its first appearance in North America was in the St. Laurence River in 1897, and it is now a problem weed in the Great Lakes.[1]

Studies by L. C. Anderson in 1974 found that the naturalized North American Butomus populations had separate sources. Those east of Niagara Falls, introduced near the St. Lawernce River, originated in eastern Asia. Those west of the Falls were introduced near Detroit, and were from western Euraasia. R. L. Stuckey, in 1994, recognized these two groups as separate species, with B. umbellatus, from western Eurasia, found west of the Falls, and B. junceus, from eastern Asia, found east of the falls.[2] B. junceus is not widely accepted as a separate species at this time, but if it were to be accepted, New York's populations would probably be considered to be B. junceus.[3][4]


Alismatales — Butomaceae — Butomus
Butomus Flowering rush N.Y. Status Images Distribution NY NPT
 L.

1753. Butomus umbellatus L.
1837. Butomus junceus Turcz.
Flowering rush,
Water gladiolus,
Grass rush
Butome à ombelle,
Jonc fleuri
Introduced from
 Eurasia,
 northern Africa,
Moderately invasive,
NYIS: 64%[1],
NE-1[2]
  NYFA-X
USDA-X
NPT Can
ARS ITIS
FNA Trop.
NSE BNA
IPN 

Images, wsp
  1. New York non-native plant invasiveness assessmentButomus umbellatus: Moderate (64). M.J.Jordan, G.Moore & T.W.Weldy (2008). Invasiveness ranking system for non-native plants of New York. Unpublished. The Nature Conservancy, Albany & Cold Spring Harbor, NY; Brooklyn Botanic Garden, Brooklyn, NY.
  2. Category 1 Plants - highly invasive - Eastern Region invasive plants, ranked by degree of invasiveness as based on information from States (1998) US Forest Service

Family HydrocharitaceaeEdit

The Hydrocharitaceae (tape-grass family) ...

Subfamily HydrocharitoideaeEdit

HydrocharisEdit

 
Hydrocharis morsus-ranae - European frog's-bit
Frog's-bit is a recent invader of northern New York State.
Alismatales — Hydrocharitaceae — Hydrocharitoideae — Hydrocharis

Hydrocharis Frog-bit N.Y. Status Images Distribution NY NPT
 L.

1753. Hydrocharis Morsus ranae L.
1827. Pontederia dubia Blume
1925. H. dubia (Blume) Backer
Common frogbit,
European frog-bit,
Frog's bit
Hydrocharide grenouillette,
Grenouillette,
Morène,
Petit nénuphar
Introduced from
 Eurasia,
 northern Africa,
Very highly invasive,
NYIS: 86%[1],
Prohibited[2]
  NYFA-X
USDA-XX
NPT Can
ARS ITIS
FNA Trop.
NSE BNA
IPN 

Images, wsp
  1. New York non-native plant invasiveness assessmentHydrocharis morsus-ranae: Very high (86). M.J.Jordan, G.Moore & T.W.Weldy (2008). Invasiveness ranking system for non-native plants of New York. Unpublished. The Nature Conservancy, Albany & Cold Spring Harbor, NY; Brooklyn Botanic Garden, Brooklyn, NY.
  2. New York State Department of Environmental Conservation Regulation 6 NYCRR Part 575 Prohibited and Regulated Invasive Species

EgeriaEdit

Alismatales — Hydrocharitaceae — Hydrocharitoideae — Egeria
Egeria Waterweed N.Y. Status Images Distribution NY NPT
 Planch.

1849. Egeria densa Planch.
1857. Elodea densa Casp.
1931. Anacharis densa Vict.
1933. Philotria densa Small
Brazilian waterweed,
Brazilian elodea,
South American waterweed
Introduced from
 Brazil,
Highly invasive,
NYIS: 75%[1],
Prohibited[2],
NE-2[3]
  NYFA-X
USDA-XW
NPT Can
ARS ITIS
FNA Trop.



Images, wsp

LimnobiumEdit

Alismatales — Hydrocharitaceae — Hydrocharitoideae — Limnobium
LimnobiumRich. 1814 Spongeplant N.Y. Status Images Distribution NY NPT
(Bosc) Rich. ex Steud.

1807. Hydrocharis spongia Bosc
1814. Limnobium spongia Rich.
1818. Hydrocharis cordifolia Nutt.
1840. Limnobium spongia Steud.
American frogbit,
American spongeplant
Introduced,
US South native,
Impersistent
  NYFA-X
USDA-N0
NEW-0
ARS ITIS
FNA Trop.



Images, wsp

Subfamily StratiotoideaeEdit

StratiotesEdit

Alismatales — Hydrocharitaceae — Stratiotoideae — Stratiotes
Stratiotes Water-aloe N.Y. Status Images Distribution NPT
 L.

1753. Stratiotes aloides L.
Water-soldiers,
Water-aloe
Stratiote faux-aloès,
Faux-aloès,
Aloès d'eau
Introduced from
 Eurasia,
Potentially invasive,
NYIS: Not ranked[1]
 
USDA-00
Can
ARS ITIS
Trop.
BNA


Images, wsp
Note: CA

Subfamily AnacharidoideaeEdit

ElodeaEdit

Alismatales — Hydrocharitaceae — Anacharidoideae — Elodea
Elodea Waterweed N.Y. Status Images Distribution NY NPT
L.Rich. ex Michx.

Canadian waterweed,
Common waterweed,
Broad waterweed
Native,
Secure
  NYFA-5
USDA-NN






Images, wsp
(Planch.) St. John

Nuttall's waterweed Native,
Secure
  NYFA-5
USDA-NN






Images, wsp
 H.St.John

    E. longivaginata H.St.John
    E. nevadensis (Planch.) H,St.John
Twoleaf waterweed,
Two-leaved waterweed,
Long-sheath waterweed
Introduced,
Western native
  NYFA-X
USDA-NN






Images, wsp

Subfamily HydrilloideaeEdit

NajasEdit

Alismatales — Hydrocharitaceae — Najadoideae — Najadeae — Najas
Najas Waternymph / Naiad N.Y. Status Images Distribution NY NPT
(Willd.) Rostk. & W.L.E.Schmidt

1798. Caulinia flexilis Willd.
1803. Najas canadensis Michx.
1824. N. flexilis Rostk. & W.L.E.Schmidt
1942. N. flexilis ssp. caespitosus
1975. N. caespitosus (Maguire) Reveal
Slender naiad,
Slender naias,
Slender water-nymph,
Nodding water-nymph,
Bushy naiad,
Northern water-nymph,
Wavy waternymph
Native,
Secure
  NYFA-5
USDA-NN
NPT 
ARS 
FNA 
NSE 


Images, wsp
(A.Braun ex Engelm.) Magnus

1867. Najas indica var. gracillima
1870. Najas gracillima Magnus
Thread-like naiad,
Thread-like water-nymph,
Slender waternymph
Native,
Likely secure
  NYFA-4
USDA-NN
NPT 





Images, wsp
(Spreng.) Magnus
ssp. guadalupensis

1825. Caulinia guadalupensis Spreng.
1870. Najas guadalupensis Magnus
Southern water-nymph,
Southern naiad
Native,
Secure
  NYFA-5
USDA-NN
NPT 
ARS ITIS
FNA Trop.



Images, wsp
(Spreng.) Magnus
ssp. muenscheri
(R.T.Clausen) R.R.Haynes & Hellq.

1937. Najas muenscheri R.T.Clausen
1979. N.g. var. muenscheri
1996. N.g. ssp. muenscheri
Hudson River water-nymph,
Muenscher's water-nymph,
Mermaid weed
Native,
Endangered,
NYNHP: 1
Endemic[1]
  NYFA-1E
USDA-N0

ITIS
FNA Trop.



Images, wsp
(Spreng.) Magnus
ssp. olivacea
(Rosend. & Butters) R.R.Haynes & Hellq.

1935. N. olivacea Rosend.& Butters
1979. N. guadalupensis var. olivacea
1996. N. guadalupensis ssp. olivacea
Guadalupe water-nymph,
Southern naiad
Native,
Endangered
  NYFA-1
USDA-NN
NPT 

FNA Trop.



Images, wsp
 L.

1753. Najas marina L.
1893. Najas gracilis Morong
1903. Najas gracilis Small
Spiny water-nymph,
Spiny naiad,
Holly-leaved naiad,
Prickly waternymph
Native,
Endangered
  NYFA-1
USDA-NN

ARS 
FNA Trop.



Images, wsp
All.

1773. Najas minor All.
1807. Fluvialis minor Pers.
1808. Ittnera minor C.C.Gmel.
1845. Caulinia minor Coss. & Germ.
Brittle water-nymph Introduced from
 Eurasia,
 n. Africa,
Potentially invasive,
[2]
  NYFA-X
USDA-XX
NPT 
ARS 
FNA Trop.



Images, wsp

HydrillaEdit

Alismatales — Hydrocharitaceae — Najadoideae — Najadeae — Hydrilla
Hydrilla Water-thyme N.Y. Status Images Distribution NY NPT
 (L.f.) Royle

1782. Serpicula verticillata L.f.
1824. Udora verticillata Spreng.
1839. Hydrilla verticillata Royle
1888. Elodea verticillata F.Muell.
Hydrilla,
Florida elodea,
Waterthyme,
Water-thyme,
Esthwaite waterweed
Introduced from
 Eurasia, Africa,
 Australia,
Very highly invasive,
NYIS: 91%[1],
Discovered 2008.[2]
  NYFA-X1
USDA-X0
NPT 
ARS ITIS
FNA Trop.



Images, wsp
  1. New York non-native plant invasiveness assessmentHydrilla verticillata: Very high (91).
  2. Three large infestations of Hydrilla were discovered in Orange and Suffolk Counties in 2008.

VallisneriaEdit

Alismatales — Hydrocharitaceae — Najadoideae — Vallisnerieae
Vallisneria Eelgrass N.Y. Status Images Distribution NY NPT
 Michx.

Eel-grass,
Tape-grass,
Water-celery,
Wild-celery
Native,
Secure
  NYFA-5
USDA-NN






Images, wsp

Family ScheuchzeriaceaeEdit

The monotypic Scheuchzeriaceae (scheuchzeria family)

ScheuchzeriaEdit

Alismatales — Scheuchzeriaceae — Scheuchzeria
Scheuchzeria Rannoch-rush N.Y. Status Images Distribution NY NPT
 L.

    S. americana (Fernald) G.N.Jones
    S. palustris var. americana Fernald
American scheuchzeria,
Rannoch-rush
Native,
Vulnerable
  NYFA-3
USDA-NN
NPT 





Images, wsp

Family JuncaginaceaeEdit

The Juncaginaceae (arrowgrass family)

TriglochinEdit

Alismatales — Juncaginaceae — Triglochin
Triglochin Arrowgrass N.Y. Status Images Distribution NY NPT
 L.

Seaside arrowgrass Native,
Likely secure
  NYFA-4
USDA-NN






Images, wsp
 L.

Slender bog arrow-grass Native,
Threatened
  NYFA-2
USDA-NN






Images, wsp

Family RuppiaceaeEdit

The Ruppiaceae (ditch-grass family)

RuppiaEdit

 
Ruppia maritima
ditch-grass

Alismatales — Ruppiaceae — Ruppia
Ruppia Widgeonweed N.Y. Status Images Distribution NY NPT
 L.

1753. Ruppia maritima L.
1915. Buccaferrea maritima Lunell
Ditch-grass,
Beaked ditchgrass,
Widgeongrass,
Sea ditchgrass,
Tassel pondweed
Ruppie maritime,
Persil d'eau
Native,
Vulnerable

OBL

Perennial,
Herb-forb
  NYFA-3-4
USDA-NN
NPT Can
ITIS
FNA Trop.
NSE BNA


Images, wsp

Family ZosteraceaeEdit

The Zosteraceae (eelgrass family)

ZosteraEdit

Alismatales — Zosteraceae — Zostera
Zostera Eelgrass N.Y. Status Images Distribution NY NPT
 L. (1753)

Zostera pacifica L.
Eelgrass,
Seawrack,
Zostére marine
Native,
Vulnerable
  NYFA-3
USDA-NN

ITIS
FNA 



Images, wsp

Family PotamogetonaceaeEdit

The Potamogetonaceae (pond-weed family)

Tribe PotamogetoneaeEdit

PotamogetonEdit

The Potamogeton (pondweed) subdivisions used here are from Lindqvist et al. (2006).[1] Chromosome numbers are from Kaplan et al. (2013).[2]
Potamogeton clade 1AEdit
 
Potamogeton crispus
curly-leaved pondweed

Alismatales — Potamogetonaceae — Potamogeton — clade 1A
Potamogetonclade 1A Pondweed N.Y. Status Images Distribution NY NPT
 Oakes

Robbins' pondweed,
Flat-leaved pondweed,
Fern pondweed
Potamot de Robbins
Native,
Secure,
2n = 52
  NYFA-5
USDA-NN
NPT 

FNA 



Images, wsp
 L.

1753. Potamogeton crispus  L.
Curly pondweed,
Curled pondweed
Potamot crepu
Introduced from
 Eurasia,
 northern Africa,
 Australia,
Very highly invasive,
NYIS: 80%[1],
NE-1[2] Note[3],
2n = 52
  NYFA-X
USDA-XX
NPT 
ARS 
FNA 



Images, wsp
  1. New York non-native plant invasiveness assessmentPotamogeton crispus: Very high (80).
  2. Category 1 Plants - highly invasive - Eastern Region invasive plants, ranked by degree of invasiveness as based on information from States (1998) US Forest Service
  3. The exotic invasive Potamogeton crispus is easily recognized by being the only species in North America with serrate leaves (Flora of North America).
Potamogeton clade 1BEdit
Alismatales — Potamogetonaceae — Potamogeton — clade 1B
Potamogetonclade 1B Pondweed N.Y. Status Images Distribution NY NPT
 L.

    
    
    
Floating pondweed,
Floating-leaved pondweed
Native, C:4,
Secure

OBL

Perennial,
Herb-forb,
2n = 52
  NYFA-5
USDA-NN
NPT 





Images, wsp
 Poir.

1816. Potamogeton nodosus Poir.
1848. P. lonchites Tuck.
1893. P. americanus var. novaeboracensis
1893. P. lonchites var. novaeboracensis
Long-leaved pondweed Native, C:4,
Secure

OBL

Perennial,
Herb-forb,
2n = 52
  NYFA-5
USDA-NN
NPT 





Images, wsp
 L.

1753. P. perfoliatus L.
    
    
Claspingleaf pondweed,
Clasping-leaved pondweed,
Clasped pondweed,
Perfoliate pondweed
Potamot perfolié
Native, C:5,
Secure

OBL

Perennial,
Herb-forb,
2n = 52
  NYFA-5
USDA-NN
NPT 
ARS 
FNA 



Images, wsp
(A.Benn.) Rydb.

1889. P. perfoliatus var. richardsonii
1905. P. richardsonii Rydb.
1941. P. perfoliatus ssp. richardsonii
Richardson's pondweed Native, C:6,
Secure

OBL

Perennial,
Herb-forb,
2n = 52
  NYFA-5
USDA-NN
NPT 

FNA 



Images, wsp
Tuck. (1848)

    
    
    
Largeleaf pondweed,
Large-leaved pondweed,
Broad-leaved pondweed
Potamot à grandes feuilles
Native, C:7,
Secure

OBL

Perennial,
Herb-forb,
2n = 52
  NYFA-5
USDA-NN
NPT Can

FNA 



Images, wsp
J.W.Robbins

    
    
    
Oakes' pondweed Native, C:7,
Secure

OBL

Perennial,
Herb-forb,
Chro. # unk.
  NYFA-5
USDA-NN
NPT 

FNA 



Images, wsp
Wulfen

    
    
    
Whitestem pondweed,
White-stemmed pondweed
Potamot à longs pédoncules
Native, C:7,
Secure

OBL

Perennial,
Herb-forb,
2n = 52
  NYFA-5
USDA-NN
NPT 

FNA 



Images, wsp
 L.

    
    
    
Grassy pondweed Native, C:7,
Secure

OBL

Perennial,
Herb-forb,
n = 26
  NYFA-5
USDA-NN
NPT 





Images, wsp

    
    
    
Illinois pondweed Native, C:7,
Secure

OBL

Perennial,
Herb-forb,
2n = 104
  NYFA-5
USDA-NN
NPT 





Images, wsp
(J.W. Robbins) Morong (pro sp.)

Potamogeton gramineus ×
Potamogeton illinoensis

    
    
    
Hybrid pondweed Native,
Vulnerable

OBL

Perennial,
Herb-forb,
2n = 78
  NYFA-3?
USDA-NN






Images, wsp

Potamogeton gramineus ×
Potamogeton perfoliatus

    
    
    
Hybrid pondweed Native,
Vulnerable

OBL

?,
Herb-forb,
2n = 52
  NYFA-3?
USDA-NN






Images, wsp
Hagstr.

Potamogeton illinoensis ×
Potamogeton perfoliatus

    
    
    
Hybrid pondweed Native,
Unranked

OBL

?,
Herb-forb
  NYFA-U
USDA-N0






Images, wsp
 Balbis

    
    
    
Alpine pondweed,
Northern pondweed,
Red pondweed
Native, C:9,
Threatened

OBL

Perennial,
Herb-forb,
2n = 52
  NYFA-2
USDA-NN
NPT 

FNA 



Images, wsp
 Tuck.

    
    
    
Spotted pondweed Native, C:10,
Threatened

OBL

Perennial,
Herb-forb,
chr. # unk.
  NYFA-2
USDA-NN
NPT 





Images, wsp
Potamogetonclade 1B (excluded species) Pondweed N.Y. Status Images Distribution NY NPT

    
    
    
Shining pondweed Introduced from
 Eurasia,
 northern Africa,
N.Y. excluded

OBL,
2n = 52
  NYFA-XCLD






Images, wsp

Potamogeton gramineus ×
Potamogeton lucens

    
    
    
Long-leaved pondweed Introduced from
 Eurasia,
 northern Africa,
N.Y. excluded

OBL,
2n = 52
  NYFA-XCLD






Images, wsp
Potamogeton clade 2AEdit
Alismatales — Potamogetonaceae — Potamogeton — clade 2A
Potamogetonclade 2A Pondweed N.Y. Status Images Distribution NY NPT
 Raf.

1808. Potamogeton epihydrus Raf.
1827. P. nuttallii Cham. & Schltdl.
1894. P. nuttallii var. ramosus
1924. P. epihydrus var. ramosus
1932. P. epihydrus var. typicus (i)
1932. P. epihydrus var. nuttallii
1965. P. epihydrus ssp. nuttallii
Ribbon-leaved pondweed,
Nuttall's pondweed
Native, C:6,
Secure

OBL

Perennial,
Herb-forb,
2n = 26
  NYFA-5
USDA-NN
NPT 

FNA Trop.



Images, wsp
Potamogeton clade 2BEdit
Alismatales — Potamogetonaceae — Potamogeton — clade 2B
Potamogetonclade 2B Pondweed N.Y. Status Images Distribution NY NPT
 Tuck.

1817. P. dimorphus Raf.
1848. P. spirillus Tuck.
Spiral pondweed,
Northern snailseed pondweed
Potamot spirille
Native, C:7,
Secure

OBL

Perennial,
Herb-forb,
2n = 28
  NYFA-5
USDA-NN
NPT Can

FNA Trop.



Images, wsp
Fernald

1893. P. diversifolius
var. trichophyllus Morong
1932. P. bicupulatus Fernald
Snailseed pondweed,
Snail-seeded pondweed
Native, C:8,
Secure

OBL

Perennial,
Herb-forb
  NYFA-5
USDA-NN
NPT Can

FNA Trop.



Images, wsp
Rchb.

1845. P. confervoides Rchb.
    P. tuckermanii
Algae-like pondweed,
Alga pondweed,
Tuckerman’s pondweed
Potamot confervoïde
Native, C:9,
Threatened

OBL

Perennial,
Herb-forb
  NYFA-3
USDA-NN
NPT Can





Images, wsp
Raf. (1808)

    P. capillaceus Poir.
    P. dimorphus Raf.
Water-thread pondweed Native, C:10,
Endangered

OBL

Perennial,
Herb-forb,
2n = 28
  NYFA-1
USDA-N0
NPT 

FNA 



Images, wsp
Potamogeton clade 2CEdit
Alismatales — Potamogetonaceae — Potamogeton — clade 2C
Potamogetonclade 2C Pondweed N.Y. Status Images Distribution NY NPT
 Raf.
ssp. foliosus

    
    
    
Leafy pondweed Native,
Secure
  NYFA-5
USDA-NN
NPT 





Images, wsp
 L.

    
    
    
Small pondweed Native,
Secure
  NYFA-5
USDA-NN
NPT 





Images, wsp
 Fieber

    P. berchtoldii Fieber
    P. pusillus var. tenuissimus
    P. pusillus ssp. tenuissimus
Berchtold’s pondweed Native, C:2,
Secure,
Herb-forb
  NYFA-5
NPT 





Images, wsp
 J.W.Robbins

    
    
    
Vasey's pondweed Native,
Secure
  NYFA-5
USDA-NN
NPT 

FNA 



Images, wsp
Fernald

    
    
 auct. P. compressusnon L.
Flat-stemmed pondweed,
Flatstem pondweed
Native,
Secure
  NYFA-5
USDA-NN
NPT 





Images, wsp

    
    
    
Fries' pondweed Native,
Likely secure
 
 
NYFA-4?
USDA-NN
NPT 





Images, wsp
Mert. & W.D.J. Koch

    
    
    
Blunt-leaved pondweed Native,
Likely secure
  NYFA-4
USDA-NN
NPT 





Images, wsp
 Morong

    
    
    
Hill's pondweed Native,
Threatened
  NYFA-2
USDA-NN
NPT 





Images, wsp
Hellquist & Hilton

    
    
    
Ogden's pondweed Native,
Endangered
NYFA-1
USDA-NN
NPT 





Images, wsp
 Benn.

    
    
 auct. P. rutilusnon Wolfg.
Straight-leaved pondweed,
Narrowleaf pondweed
Native,
Endangered
NYFA-1
USDA-NN
NPT 





Images, wsp
Hellquist & Crow

Potamogeton strictifolius ×
Potamogeton zosteriformis

    
    
    
Hybrid pondweed Native,
Endangered
NYFA-1?
USDA-NN






Images, wsp
Potamogetonclade 2C (excluded species) Pondweed N.Y. Status Images Distribution NY NPT

1753. P. compressus L.
    
Grass-wrack pondweed,
Flatstem pondweed,
Eelgrass pondweed
Introduced from
 Eurasia,
N.Y. excluded
  NYFA-XCLD





Kew 
Images, wsp
Wolfg.

1827. P. rutilus Wolfg.
    
Shetland pondweed Introduced from
 Eurasia,
N.Y. excluded
  NYFA-XCLD





Kew 
Images, wsp

StuckeniaEdit

Alismatales — Potamogetonaceae — Stuckenia
Stuckenia Pondweed N.Y. Status Images Distribution NY NPT
 (L.) Börner

    Potamogeton pectinatus L.
    Stuckenia pectinata (L.) Börner
    Coleogeton pectinatum
(L.) Les & R.R.Haynes
Sago pondweed Native, C:2,
Secure
  NYFA-5
USDA-NN






Images, wsp
(Pers.) Börner

    
    
    
Thread-leaved pondweed,
Fineleaf pondweed
Native,
Endangered
  NYFA-1
USDA-NN






Images, wsp
Stuckenia (excluded species) Pondweed N.Y. Status Images Distribution NY NPT
(Turcz.) Holub

1854. Potamogeton vaginatus Turcz.
1984. Stuckenia vaginata
(Turcz.) Holub
    
Sheathed pondweed,
Big sheathed pondweed,
Large sheathed pondweed
Potamot engainé
N. America native,
Endangered
  NYFA-XCLD
USDA-NN


FNA 



Images, wsp

Tribe ZannichellieaeEdit

ZannichelliaEdit

Alismatales — Potamogetonaceae — Zannichellia
Zannichellia Horned pondweed N.Y. Status Images Distribution NY NPT
 L.

1753. Zannichellia palustris L.
Horned pondweed Native,
Secure
  NYFA-5
USDA-NN
NPT Can
ITIS
FNA 



Images, wsp

Nymphaeales & magnoliids
Flora of New York — Acorales & Alismatales
Dioscoreales & Liliales
Table of
contents
Genus
index
Protected species index Invasive species index

ReferencesEdit