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Flora of New York/Acorales & Alismatales

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The Acorales and Alismatales form the basal grade of the monocots (Lilianae), informally grouped as the "alismatid monocots."[1][2]
monocots
 
Acorales : Acoraceae
 

Acorus americanus (American sweetflag)

 
 

Acorus calamus (old world sweetflag)

 
 
 
 
 
Alismatales
 

Tofieldiaceae—Triantha glutinosa (sticky false asphodel)

 
 
 
Araceae
 
Orontioideeae
 

Orontium aquaticum (golden club)

 
 

Symplocarpus foetidus (skunk cabbage)

 
 
 
 
 
Lemnoideae
 

Spirodela polyrrhiza (common duckmeal)

 
 

Lemna spp. (5 duckweeds)

 
 

Wolffia spp. (3 watermeals)

 
 
 
 
Aroideae
 

Calla palustris (wild calla, water arum)

 
 

Peltandra virginica (green arrow arum, tuckahoe)

 
 

Arisaema dracontium (green dragon)

 
 

Arisaema triphyllum (4 Jack-in-the-pulpit subspp.)

 
 
 
 
 
 
 
 
 
Alismataceae
 

Sagittaria spp. (9 arrowheads)

 
 

Alisma spp. (3 water plantains)

 
 
 
 
 

Butomaceae—Butomus umbellatus (flowering rush)

 
 
Hydrocharitaceae
 
Hydrocharitoideae
 

Hydrocharis morsus-ranae (European frog’s bit)

 
 

Egeria densa (Brazilian waterweed)

 
 

Limnobium spongia (American frog’s bit)

 
 
 
 
 

Stratiotoideae—

 
 
 

Anacharidoideae—Elodea spp. (3 waterweeds)

 
 
Hydrilloideae
 

Najas spp. (8 water nymphs, naiads)

 
 

Hydrilla verticillata (hydrilla, water thyme)

 
 

Vallisneria americana (water celery, tape grass)

 
 
 
 
 
 
 
 
 
 
 

Scheuchzeriaceae—Scheuchzeria palustris (pod grass)

 
 
 

Aponogetonaceae (none in NY)

 
 
 

Juncaginaceae—Triglochin spp. (2 arrowgrasses)

 
 
 

Maundiaceae (none in NY)

 
 
 
 

Posidoniaceae (none in NY)

 
 
 

Ruppiaceae—Ruppia maritima (widgeon grass, ditch grass)

 
 

Cymodoceaceae (none in NY)

 
 
 
 
 

Zosteraceae—Zostera marina (eel grass}

 
 

Potamogetonaceae

 
 
 
 
 
 
 
 
 
 
 
 
 

Dioscoreales

 
 
 

Liliales

 
 
 

Asparagales

 
 
 
 

Poales

 
 
 

Zingiberales

 
 

Commelinales

 
 
 
 
 
 
 
 
 
alismatid
monocots
lilioid
monocots
commelinid
monocots
  1. ↑ APG IV (2016). "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG IV". Botanical Journal of the Linnean Society. 181 (1): 1–20. doi:10.1111/boj.12385.
  2. ↑ Chase, Mark W; Reveal, James L (2009), "A phylogenetic classification of the land plants to accompany APG III" (PDF), Botanical Journal of the Linnean Society, 161 (2): 122–127, doi:10.1111/j.1095-8339.2009.01002.x
Clade Order Family Subfamily Tribe Genus Common names #
alismatid
monocots 		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 Acorales Edit

The order Acorales consists of only the Acoraceae (sweetflag family), with Acorus as its only genus.[1]
  1. ↑ P. F. Stevens, (2001 onwards). "Acorales," Angiosperm Phylogeny Website. Version 13, September 28, 2013 (and more or less continuously updated since). http://www.mobot.org/MOBOT/research/APweb/orders/Acoralesweb.htm#Acorales.

Family Acoraceae Edit

Acorus Edit

 
Acorus calamus
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 calamus non L.
 American sweet-flag,
American sweetflag,
Several-veined sweetflag,
Sweetflag
Acore d'Amérique,
Acorus d'Amérique,
Belle-angélique 		Native, CoC: 5,
Secure,
Fertile diploid
 (2n = 2x = 24)
OBL
Perennial,
Herb-forb,
Sun 		 
NYFA: 14 counties
iNat: 5 counties 		NYFA-5
USDA-N
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 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
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Order Alismatales Edit

The order Alismatales as defined in the Angiosperm Phylogeny Website.[1]
  1. ↑ P. F. Stevens, (2001 onwards). "Alismatales," Angiosperm Phylogeny Website. Version 13, September 28, 2013 (and more or less continuously updated since). http://www.mobot.org/MOBOT/research/APweb/orders/Alismatalesweb.htm#Alismatales.

Family Araceae Edit

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 Orontioideae Edit

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.

Orontium Edit

 
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, CoC: 9,
Threatened,
NYNHP: 2[1]
OBL
Perennial,
Herb-forb,
Part shade 		  NYFA-2
USDA-N0
ARS-GRIN
Tropicos
BONAP
LBJ
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  1. ↑ New York Natural Heritage Program. 2016. Online Conservation Guide for Orontium aquaticum. Threatened, S2/G5.

Symplocarpus Edit

 
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, CoC: 5,
Secure
OBL
Perennial,
Herb-forb,
Shade 		  NYFA-5
USDA-NN
ARS-GRIN
FNA
Tropicos
LBJ
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Subfamily Lemnoideae Edit

 
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.

Spirodela Edit

 
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
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  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.

Lemna Edit

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, CoC: 2,
Secure 		  NYFA-5
USDA-NN
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 L.
 Star duckweed Native, CoC: 4,
Secure 		  NYFA-5
USDA-NN
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 Torr.
 Minute duckweed Native, CoC: 4,
Endangered,
NYNHP: 1[1]		   NYFA-1
USDA-NN
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 Phil.
 Pale duckweed,
Valdivia duckweed 		Native, CoC: 10,
Endangered,
NYNHP: 1[2]		   NYFA-1
USDA-NN
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 Landolt
 Turion duckweed,
Lenticulare turionifère 		Native, CoC: 4,
Unranked
OBL 		  NYFA-U
USDA-NN
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Lemna (excluded species) Duckweed N.Y. Status Images Distribution NY NPT
 L.
    Lemna gibba L.
    
    
 Swollen duckweed N. America native,
N.Y. excluded 		  NYFA-Excluded
USDA-N0
Images
Wikispecies
 (Austin) Daubs
    L. minor var. obscura
    
    
 Little duckweed N. America native,
N.Y. excluded 		  NYFA-Excluded
USDA-N0
ARS-GRIN
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  1. ↑ New York Natural Heritage Program. 2016. Online Conservation Guide for Lemna perpusilla. Endangered, S1/G5.
  2. ↑ New York Natural Heritage Program. 2016. Online Conservation Guide for Lemna valdiviana. Endangered, S1/G5.

Wolffia Edit

 
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
Wolffia Horkel 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
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 (Engelm.) Landolt & Wildi
ex Gandhi, Wiersema & Brouillet
1867. W. brasiliensis var. borealis Engelm.
1977. Wolffia borealis Landolt & … nom. inval.
2012. Wolffia borealis … ex Ghandhi, …
 auct. Wolffia punctata
 Dotted watermeal,
Northern watermeal,
Northern duckmeal
Wolffie borèle 		Native,
Likely secure 		  NYFA-4
USDA-NN
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 Wedd.
    Bruniera punctata
    Wolffia punctata Griseb.
    Wolffia papulifera
 Brazilian watermeal Native,
Likely secure 		  NYFA-4
USDA-N0
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Subfamily Aroideae Edit

Tribe Calleae Edit

Calla Edit
 
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
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Tribe Peltandreae Edit

Peltandra Edit
 
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
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Tribe Arisaemateae Edit

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.
Arisaema Edit
 
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]

  1. ↑ M. Treiber (1980). "Biosystematics of the Arisaema triphyllum Complex." PhD Dissertation, University of North Carolina, Chapel Hill.
Alismatales — Araceae — Aroideae — Arisaemateae — Arisaema
Arisaema Mart. 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
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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.
Stewardson's Jack-in-the-pulpit
Swamp Jack-in-the-pulpit
Arisème de Stewardson
Arisèma de Stewardson
 Native,
Secure
FAC 		  NYFA-5
USDA-N
VASCAN
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  ssp. stewardsonii ×
  ssp. triphyllum
 Hybrid of
 Swamp Jack-in-the-pulpit &
 Common Jack-in-the-pulpit
Native,
Unknown
FAC 		  NYFA-U
Images
Wikispecies
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
VASCAN
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Arisaema Mart. 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
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  1. ↑ a b Susanne S. Renner, Li-Bing Zhang & Jin Murata (2004) "A chloroplast phylogeny of Arisaema (Araceae) illustrates Tertiary floristic links between Asia, North America, and East Africa." American Journal of Botany 91(6): 881-888.
Pinellia Edit
 
Pinellia ternata
Pinellia ternata (crowdipper) is being tracked as a potentially invasive plant in New York and New Jersey.[1]
  1. ↑ New York Species Record for Pinellia ternata (crowdipper) in iMapInvasives, updated 8/8/2016
Alismatales — Araceae — Aroideae — Arisaemateae — Pinellia
Pinellia Pinellia N.Y. Status Images Distribution NY NPT
 (Thunb.) Makino
1784. Arum ternatum Thunb.
1837. Alocasia ternata (Thunb.) Raf.
1837. Atherurus ternatus (Thunb.) Blume
1901. Pinellia ternata (Thunb.) Makino
 Crowdipper,
Asian green dragon 		Introduced from
 eastern Asia,
Potentially invasive,
 NYIS Tier: Untiered,
 iMapInvasives,
 Invasive.org: [1],
 USGS: L48 not listed,
Unknown naturalization,
SNA,
NSE: Exotic
Perennial,
Herb-forb 		 
NYFA: Kings County
iNat: 3 counties 		NYFA-X
GBIF
iNaturalist
Images
Wikispecies

Tribe Pistieae Edit

Pistia Edit
 
Pistia stratiotes
Water lettuce (Pistia stratiotes) is now listed with an Ecological Invasiveness rank of Very High and placed in New York State Tier 2.[1]
  1. ↑ New York State Invasive Species Tiers, Water lettuce (Pistia stratiotes).
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,
Very highly invasive,
 NYIS: 62%[1],
Impersistent 		  NYFA: 2 counties
iMap: 3 counties
iNat: 5 counties 		NYFA-X
USDA-N0
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  1. ↑ New York non-native plant invasiveness assessment – Pistia stratiotes: Not Assessable (62).

Tribe Colocasieae Edit

Colocasia Edit
 
Colocasia esculenta
Alismatales — Araceae — Aroideae — Colocasieae — Colocasia
Colocasia Taro N.Y. Status Images Distribution NY NPT
 (L.) Schott
    Arum esculentum L.
    Colocasia esculenta (L.) Schott
Coco yam
 Introduced,
Highly invasive 		 
NYFA: Not listed
iNat: xx counties 		NYFA-Excluded
Images
Wikispecies

Family Tofieldiaceae Edit

Triantha Edit

Alismatales — Tofieldiaceae
Triantha Tofieldia N.Y. Status Images Distribution NY NPT
 (Michx.) Baker
 Sticky false-asphodel Native,
Endangered 		  NYFA-1
USDA-NN
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Family Alismataceae Edit

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

Sagittaria Edit

 
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, CoC: 3,
Secure
OBL
Perennial,
Herb-forb 		  NYFA-5
USDA-N
Go Botany
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Sessile-fruited arrowhead Native, CoC: 6,
Secure
OBL
Perennial,
Herb-forb 		  NYFA-5
USDA-N
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ssp. graminea
 Grass-leaved arrowhead Native, CoC: 8,
Secure
OBL
Perennial,
Herb-forb 		  NYFA-5
USDA-N
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Northern arrowhead,
Wapato,
Wapatum arrowhead 		Native, CoC: 6,
Secure
OBL
Perennial,
Herb-forb 		  NYFA-5
USDA-NN
Go Botany
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Acid-water arrowhead,
Engelmann arrowhead 		Native, CoC: 9,
Likely secure
OBL
Perennial,
Herb-forb 		  NYFA-4
USDA-N
Go Botany
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Strap-leaved arrowhead Native, CoC: 7,
Rare
OBL
Perennial,
Herb-forb 		  NYFA-3
USDA-N
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ssp. spongiosa
    Lophotocarpus spathulatus
    Lophotocarpus spongiosus
    Sagittaria spathulata
    S. calycina var. spongiosa
 Spongy-leaved arrowhead,
Tidal arrowhead,
Spongy arrowhead,
Hooded arrowhead 		Native, CoC: 7,
Threatened
OBL
Annual,
Herb-forb 		  NYFA-2
USDA-N
Go Botany
FNA
Images
Wikispecies
Slender arrowhead,
Quill-leaved sagittaria 		Native, CoC: 10,
Endangered
OBL
Perennial,
Herb-forb 		  NYFA-1
USDA-N
Go Botany
FNA
Images
Wikispecies
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. longirostra non J.G.Sm.
 Longbeak arrowhead,
Appalachian arrowhead 		N. America native,
N.Y. excluded 		  NYFA-Excluded
USDA-N
Go Botany
ARS-GRIN
FNA
Tropicos
Images
Wikispecies

Alisma Edit

Alismatales — Alismataceae — Alisma
Alisma Water-plantain N.Y. Status Images Distribution NY NPT
    
    
    
 Southern water-plantain,
Broad-leaved water-plantain 		Native, CoC: 4,
Secure
OBL
Perennial,
Herb-forb 		  NYFA-5
USDA-N
Go Botany
Images
Wikispecies
 Pursh
    Alisma triviale Pursh
    A. plantago-aquatica L. misappl.
 Northern water-plantain Native, CoC: 4,
Secure
OBL
Perennial,
Herb-forb 		  NYFA-5
USDA-N
Go Botany
Images
Wikispecies
 Lej.
    
    
    
 Narrow-leaved water-plantain,
Grass-leaved water-plantain,
Ribbonleaf water-plantain 		Native, CoC: 7,
Threatened
OBL
Perennial,
Herb-forb 		  NYFA-2-3
USDA-N
Go Botany
Images
Wikispecies
Note: [1]
  1. ↑ Changes Since the June 2010 Rare Plant Status Lists: Alisma gramineum State Rank = S3S4

Helanthium Edit

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
Go Botany
ARS-GRIN
ITIS
FNA
Tropicos
Images
Wikispecies

Family Butomaceae Edit

Butomus Edit

 
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]

  1. ↑ Go Botany - New England Wild Flower Society
  2. ↑ Flora of North America, www.eFloras.org
  3. ↑ Weldy, Troy, David Werier, and Andrew Nelson (2014) New York Flora Atlas. New York Flora Association, Albany, New York.
  4. ↑ Cao, L., L. Berent, and A. Fusaro (2014). Butomus umbellatus. USGS Nonindigenous Aquatic Species Database, Gainesville, FL.
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],
 USGS: L48 invasive,
NE-1[2]		   NYFA-X
USDA-X
GBIF
Go Botany
VASCAN
ARS-GRIN
ITIS
FNA
Tropicos
NatureServe
BONAP
IPN
Images
Wikispecies
  1. ↑ New York non-native plant invasiveness assessment – Butomus 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 Hydrocharitaceae Edit

The Hydrocharitaceae (tape-grass family) ...

Subfamily Hydrocharitoideae Edit

Hydrocharis Edit

 
Hydrocharis morsus-ranae
European frog-bit (Hydrocharis morsus-ranae) is a recent invader of northern New York State, often occurring with Phragmites australis.
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
Go Botany
VASCAN
ARS-GRIN
ITIS
FNA
Tropicos
NatureServe
BONAP
IPN
Images
Wikispecies
  1. ↑ New York non-native plant invasiveness assessment – Hydrocharis 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

Egeria Edit

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
Go Botany
VASCAN
ARS-GRIN
ITIS
FNA
Tropicos
Images
Wikispecies
  1. ↑ New York non-native plant invasiveness assessment – Egeria densa: High (75).
  2. ↑ New York State Department of Environmental Conservation Regulation 6 NYCRR Part 575 Prohibited and Regulated Invasive Species
  3. ↑ Category 2 Plants - moderately invasive - Eastern Region invasive plants, ranked by degree of invasiveness as based on information from States (1998) US Forest Service

Limnobium Edit

 
Limnobium spongia
Alismatales — Hydrocharitaceae — Hydrocharitoideae — Limnobium
Limnobium Rich. 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
Go Botany-0
ARS-GRIN
ITIS
FNA
Tropicos
Images
Wikispecies

Subfamily Stratiotoideae Edit

Stratiotes Edit

 
Stratiotes aloides
Although not yet found in New York, Stratiotes aloides (water soldiers) have been discovered on the Trent River in Ontario and the Ottawa River in Quebec.[1][2]
  1. ↑ iNaturalist (2021). Stratiotes aloides (Water-Soldier)
  2. ↑ Fusaro, A., A. Davidson, K. Alame, M. Gappy, E. Baker, G. Nunez, J. Larson, W. Conard, and P. Alsip, 2021, Stratiotes aloides L.: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, and NOAA Great Lakes Aquatic Nonindigenous Species Information System, Ann Arbor, MI, Revision Date: 5/11/2017, Access Date: 9/14/2021
Alismatales — Hydrocharitaceae — Stratiotoideae — Stratiotes
Stratiotes Water-aloe N.Y. Status Images Distribution 0 NPT
 L.
1753. Stratiotes aloides L.
 Water-soldiers,
Water-aloe
Stratiote faux-aloès,
Faux-aloès,
Aloès d'eau 		Introduced from
 Eurasia,
Highly invasive,
 NYIS: Not ranked[1],
NYS Tier 1a 		  no reports
USDA-00
VASCAN
iNaturalist
ARS-GRIN
ITIS
Tropicos
BONAP
Images
Wikispecies
Note: CA
  1. ↑ New York non-native plant invasiveness assessment – Stratiotes aloides: Listed but not ranked (No reports outside of cultivation in New York).

Subfamily Anacharidoideae Edit

Elodea Edit

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
Wikispecies
(Planch.) St. John
 Nuttall's waterweed Native,
Secure 		  NYFA-5
USDA-NN
Images
Wikispecies
 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
Wikispecies

Lagarosiphon Edit

 
Lagarosiphon major flowers on Salagou Lake, France
African oxygen weed or African elodea (Lagarosiphon major) is listed on the Federal Noxious Weed list and on the Michigan prohibited aquatic plant list.[1] The New York State rank is High.[2]
  1. ↑ The Midwest Invasive Species Information Network (MISIN) (2021). African oxygen weed (Lagarosiphon major).
  2. ↑ New York State Invasive Species Tiers: African elodea (Lagarosiphon major), Ecological Rank High, NYS Tier 1b, Capitol Region 1c, 2021 New York Natural Heritage Program.
Alismatales — Hydrocharitaceae — Anacharidoideae — Lagarosiphon
Lagarosiphon Oxygen weed N.Y. Status Images Distribution NY NPT
 (Ridl.) Moss
 African oxygen weed,
African elodea 		Introduced,
Highly invasive 		  NYFA-Excluded
USDA-X?
Images
Wikispecies

Subfamily Hydrilloideae Edit

Najas Edit

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
Go Botany
ARS-GRIN
FNA
NatureServe
Images
Wikispecies
(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
Go Botany
Images
Wikispecies
(Spreng.) Magnus
ssp. guadalupensis
1825. Caulinia guadalupensis Spreng.
1870. Najas guadalupensis Magnus
 Southern water-nymph,
Southern naiad 		Native,
Secure 		  NYFA-5
USDA-NN
Go Botany
ARS-GRIN
ITIS
FNA
Tropicos
Images
Wikispecies
(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
Tropicos
Images
Wikispecies
(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
Go Botany
FNA
Tropicos
Images
Wikispecies
 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-GRIN
FNA
Tropicos
Images
Wikispecies
 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,
Moderately invasive,
NYS Tier 5[2],
[3]		   NYFA-X
USDA-XX
Go Botany
ARS-GRIN
FNA
Tropicos
Images
Wikispecies
  1. ↑ The Hudson River water-nymph is endemic to the lower Hudson River (from the Mohawk River to Piermont), one of the few New York endemic taxa. New York Natural Heritage Program. 2016. Online Conservation Guide for Najas guadalupensis ssp. muenscheri. Endangered, S1/G5T1.
  2. ↑ New York State Invasive Species Tiers: Najas minor (brittle naiad) - NYS Tier 5
  3. ↑ Najas minor is prohibited in Connecticut, Maine, Massachusetts, and New Hampshire. 2021 Native Plant Trust, Go Botany.

Hydrilla Edit

 
Hydrilla verticillata
The genus Hydrilla is usually considered to contain the single species Hydrilla verticillata, which is commonly known simply as hydrilla. It's a Eurasian aquatic plant commonly used in aquariums and was probably first released in North America in the 1950s but not found in New York State until 2008, when it was discovered in Orange and Suffolk Counties.[1][2]

More recently, hydrilla has been discovered in and around Cayuga Lake, Tonawanda Creek near Buffalo, Susquehanna River near Binghamton and elsewhere. By 2021, iMapInvasives showed hydrilla in at least 12 New York counties.[3]

  1. ↑ New York State Department of Environmental Conservation (2021). "Hydrilla."
  2. ↑ New York State Department of Environmental Conservation (2020). Hydrilla Fact Sheet.
  3. ↑ New York State Invasive Species Tiers: Hydrilla verticillata. 2021 New York Natural Heritage Program.
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],
NYS Tier 2[2],
Discovered 2008.[3]		   NYFA: Orange, Westchester

iMap: ≥ 12 counties 		NYFA-X1
USDA-X0
Go Botany
ARS-GRIN
ITIS
FNA
Tropicos
Images
Wikispecies
  1. ↑ New York non-native plant invasiveness assessment – Hydrilla verticillata: Very high (91).
  2. ↑ New York State Invasive Species Tiers: Hydrilla verticillata. 2021 New York Natural Heritage Program.
  3. ↑ Three large infestations of Hydrilla were discovered in Orange and Suffolk Counties in 2008.

Vallisneria Edit

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
Wikispecies

Family Scheuchzeriaceae Edit

The monotypic Scheuchzeriaceae (scheuchzeria family)

Scheuchzeria Edit

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
Go Botany
Images
Wikispecies

Family Juncaginaceae Edit

The Juncaginaceae (arrowgrass family)

Triglochin Edit

Alismatales — Juncaginaceae — Triglochin
Triglochin Arrowgrass N.Y. Status Images Distribution NY NPT
 L.
 Seaside arrowgrass Native,
Likely secure 		  NYFA-4
USDA-NN
Images
Wikispecies
 L.
 Slender bog arrow-grass Native,
Threatened 		  NYFA-2
USDA-NN
Images
Wikispecies

Family Ruppiaceae Edit

The Ruppiaceae (ditch-grass family)

Ruppia Edit

 
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
Go Botany
VASCAN
ITIS
FNA
Tropicos
NatureServe
BONAP
Images
Wikispecies

Family Zosteraceae Edit

The Zosteraceae (eelgrass family)

Zostera Edit

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
Wikispecies

Family Potamogetonaceae Edit

The Potamogetonaceae (pond-weed family)

Tribe Potamogetoneae Edit

Potamogeton Edit

The Potamogeton (pondweed) subdivisions used here are from Lindqvist et al. (2006).[1] Chromosome numbers are from Kaplan et al. (2013).[2]
  1. ↑ Lindqvist, C., De Laet, J., Haynes, R. R., Aagesen, L., Keener, B. R. and Albert, V. A. (2006), Molecular phylogenetics of an aquatic plant lineage, Potamogetonaceae. Cladistics, 22: 568–588. doi: 10.1111/j.1096-0031.2006.00124.x
  2. ↑ Zdeněk Kaplan, Vlasta Jarolímová & Judith Fehrer (2013). "Revision of chromosome numbers of Potamogetonaceae: a new basis for taxonomic and evolutionary implications." Preslia 85:421–482, 2013.
Potamogeton clade 1A Edit
 
Potamogeton crispus
curly-leaved pondweed
Alismatales — Potamogetonaceae — Potamogeton — clade 1A
Potamogeton clade 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
Go Botany
FNA
Images
Wikispecies
 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
Go Botany
ARS-GRIN
FNA
Images
Wikispecies
  1. ↑ New York non-native plant invasiveness assessment – Potamogeton 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 1B Edit
 
Potamogeton natans
Alismatales — Potamogetonaceae — Potamogeton — clade 1B
Potamogeton clade 1B Pondweed N.Y. Status Images Distribution NY NPT
 L.
    
    
    
 Floating pondweed,
Floating-leaved pondweed 		Native, CoC: 4,
Secure
OBL
Perennial,
Herb-forb,
2n = 52 		  NYFA-5
USDA-NN
Go Botany
Images
Wikispecies
 Poir.
1816. Potamogeton nodosus Poir.
1848. P. lonchites Tuck.
1893. P. americanus var. novaeboracensis (Morong) A. Benn. ex Fassett
1893. P. lonchites var. novaeboracensis Morong
 Long-leaved pondweed Native, CoC: 4,
Secure
OBL
Perennial,
Herb-forb,
2n = 52 		  NYFA-5
USDA-NN
Go Botany
Images
Wikispecies
 L.
1753. P. perfoliatus L.
    
    
 Claspingleaf pondweed,
Clasping-leaved pondweed,
Clasped pondweed,
Perfoliate pondweed
Potamot perfolié 		Native, CoC: 5,
Secure
OBL
Perennial,
Herb-forb,
2n = 52 		  NYFA-5
USDA-NN
Go Botany
ARS-GRIN
FNA
Images
Wikispecies
(A.Benn.) Rydb.
1889. P. perfoliatus var. richardsonii A.Benn.
1905. P. richardsonii Rydb.
1941. P. perfoliatus ssp. richardsonii Hultén
 Richardson's pondweed Native, CoC: 6,
Secure
OBL
Perennial,
Herb-forb,
2n = 52 		  NYFA-5
USDA-NN
Go Botany
FNA
Images
Wikispecies
Tuck. (1848)
    
    
    
 Largeleaf pondweed,
Large-leaved pondweed,
Broad-leaved pondweed
Potamot à grandes feuilles 		Native, CoC: 7,
Secure
OBL
Perennial,
Herb-forb,
2n = 52 		  NYFA-5
USDA-NN
Go Botany
VASCAN
FNA
Images
Wikispecies
J.W.Robbins
    
    
    
 Oakes' pondweed Native, CoC: 7,
Secure
OBL
Perennial,
Herb-forb,
Chro. # unk. 		  NYFA-5
USDA-NN
Go Botany
FNA
Images
Wikispecies
Wulfen
    
    
    
 Whitestem pondweed,
White-stemmed pondweed
Potamot à longs pédoncules 		Native, CoC: 7,
Secure
OBL
Perennial,
Herb-forb,
2n = 52 		  NYFA-5
USDA-NN
Go Botany
FNA
Images
Wikispecies
 L.
    
    
    
 Grassy pondweed Native, CoC: 7,
Secure
OBL
Perennial,
Herb-forb,
n = 26 		  NYFA-5
USDA-NN
Go Botany
Images
Wikispecies
    
    
    
 Illinois pondweed Native, CoC: 7,
Secure
OBL
Perennial,
Herb-forb,
2n = 104 		  NYFA-5
USDA-NN
Go Botany
Images
Wikispecies
(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
Wikispecies
  Potamogeton gramineus ×
  Potamogeton perfoliatus
    
    
    
 Hybrid pondweed Native,
Vulnerable
OBL
?,
Herb-forb,
2n = 52 		  NYFA-3?
USDA-NN
Images
Wikispecies
Hagstr.
  Potamogeton illinoensis ×
  Potamogeton perfoliatus
    
    
    
 Hybrid pondweed Native,
Unranked
OBL
?,
Herb-forb 		  NYFA-U
USDA-N0
Images
Wikispecies
 Balbis
    
    
    
 Alpine pondweed,
Northern pondweed,
Red pondweed 		Native, CoC: 9,
Threatened
OBL
Perennial,
Herb-forb,
2n = 52 		  NYFA-2
USDA-NN
Go Botany
FNA
Images
Wikispecies
 Tuck.
    
    
    
 Spotted pondweed Native, CoC: 10,
Threatened
OBL
Perennial,
Herb-forb,
chr. # unk. 		  NYFA-2
USDA-NN
Go Botany
Images
Wikispecies
Potamogeton clade 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-Excluded
Images
Wikispecies
  Potamogeton gramineus ×
  Potamogeton lucens
    
    
    
 Long-leaved pondweed Introduced from
 Eurasia,
 northern Africa,
N.Y. excluded
OBL,
2n = 52 		  NYFA-Excluded
Images
Wikispecies
Potamogeton clade 2A Edit
Alismatales — Potamogetonaceae — Potamogeton — clade 2A
Potamogeton clade 2A Pondweed N.Y. Status Images Distribution NY NPT
 Raf.
1808. Potamogeton epihydrus Raf.
1827. P. nuttallii Cham. & Schltdl.
1894. P. nuttallii var. ramosus Peck
1924. P. epihydrus var. ramosus (Peck) House
1932. P. epihydrus var. typicus (Raf.) Fernald (i)
1932. P. epihydrus var. nuttallii (Cham. & Schltdl.) Fernald
1965. P. epihydrus ssp. nuttallii (Cham. & Schltdl.) Calder & Roy L.Taylor
 Ribbon-leaved pondweed,
Nuttall's pondweed 		Native, CoC: 6,
Secure
OBL
Perennial,
Herb-forb,
2n = 26 		  NYFA-5
USDA-NN
Go Botany
FNA
Tropicos
Images
Wikispecies
Potamogeton clade 2B Edit
Alismatales — Potamogetonaceae — Potamogeton — clade 2B
Potamogeton clade 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, CoC: 7,
Secure
OBL
Perennial,
Herb-forb,
2n = 28 		  NYFA-5
USDA-NN
Go Botany
VASCAN
FNA
Tropicos
Images
Wikispecies
Fernald
1893. P. diversifolius
var. trichophyllus Morong
1932. P. bicupulatus Fernald
 Snailseed pondweed,
Snail-seeded pondweed 		Native, CoC: 8,
Secure
OBL
Perennial,
Herb-forb 		  NYFA-5
USDA-NN
Go Botany
VASCAN
FNA
Tropicos
Images
Wikispecies
Rchb.
1845. P. confervoides Rchb.
    P. tuckermanii
 Algae-like pondweed,
Alga pondweed,
Tuckerman’s pondweed
Potamot confervoïde 		Native, CoC: 9,
Threatened
OBL
Perennial,
Herb-forb 		  NYFA-3
USDA-NN
Go Botany
VASCAN
Images
Wikispecies
Raf. (1808)
    P. capillaceus Poir.
    P. dimorphus Raf.
 Water-thread pondweed Native, CoC: 10,
Endangered
OBL
Perennial,
Herb-forb,
2n = 28 		  NYFA-1
USDA-N0
Go Botany
FNA
Images
Wikispecies
Potamogeton clade 2C Edit
Alismatales — Potamogetonaceae — Potamogeton — clade 2C
Potamogeton clade 2C Pondweed N.Y. Status Images Distribution NY NPT
 Raf.
ssp. foliosus
    
    
    
 Leafy pondweed Native,
Secure 		  NYFA-5
USDA-NN
Go Botany
Images
Wikispecies
 L.
    
    
    
 Small pondweed Native,
Secure 		  NYFA-5
USDA-NN
Go Botany
Images
Wikispecies
 Fieber
    P. berchtoldii Fieber
    P. pusillus var. tenuissimus Mert. & W.D.J.Koch
    P. pusillus ssp. tenuissimus (Mert. & W.D.J.Koch) Haynes & C.B.Hellquist
 Berchtold’s pondweed Native, CoC: 2,
Secure,
Herb-forb 		  NYFA-5
Go Botany
Images
Wikispecies
 J.W.Robbins
    
    
    
 Vasey's pondweed Native,
Secure 		  NYFA-5
USDA-NN
Go Botany
FNA
Images
Wikispecies
Fernald
    
    
 auct. P. compressus non L.
 Flat-stemmed pondweed,
Flatstem pondweed 		Native,
Secure 		  NYFA-5
USDA-NN
Go Botany
Images
Wikispecies
    
    
    
 Fries' pondweed Native,
Likely secure 		 
  		NYFA-4?
USDA-NN
Go Botany
Images
Wikispecies
Mert. & W.D.J. Koch
    
    
    
 Blunt-leaved pondweed Native,
Likely secure 		  NYFA-4
USDA-NN
Go Botany
Images
Wikispecies
 Morong
    
    
    
 Hill's pondweed Native,
Threatened 		  NYFA-2
USDA-NN
Go Botany
Images
Wikispecies
Hellquist & Hilton
    
    
    
 Ogden's pondweed Native,
Endangered 		NYFA-1
USDA-NN
Go Botany
Images
Wikispecies
 Benn.
    
    
 auct. P. rutilus non Wolfg.
 Straight-leaved pondweed,
Narrowleaf pondweed 		Native,
Endangered 		NYFA-1
USDA-NN
Go Botany
Images
Wikispecies
Hellquist & Crow
  Potamogeton strictifolius ×
  Potamogeton zosteriformis
    
    
    
 Hybrid pondweed Native,
Endangered 		NYFA-1?
USDA-NN
Images
Wikispecies
Potamogeton clade 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-Excluded
Kew WCSP
Images
Wikispecies
 Wolfg.
1827. P. rutilus Wolfg.
    
 Shetland pondweed Introduced from
 Eurasia,
N.Y. excluded 		  NYFA-Excluded
Kew WCSP
Images
Wikispecies

Stuckenia Edit

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, CoC: 2,
Secure 		  NYFA-5
USDA-NN
Images
Wikispecies
(Pers.) Börner
    
    
    
 Thread-leaved pondweed,
Fineleaf pondweed 		Native,
Endangered 		  NYFA-1
USDA-NN
Images
Wikispecies
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-Excluded
USDA-NN
FNA
Images
Wikispecies

Tribe Zannichellieae Edit

Zannichellia Edit

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
Go Botany
VASCAN
ITIS
FNA
Images
Wikispecies
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