Potamogeton nodosus Poir.,  Encycl. Suppl. 4: 535 1816. (Syn: Potamogeton americanus Cham. & Schltdl., nom.illeg.; Potamogeton americanus subsp. mascarensis (Cham. & Schltdl.) A.Benn.; Potamogeton americanus var. novaeboracensis (Morong) A.Benn.; Potamogeton americanus var. thunbergii (Cham. & Schltdl.) A.Benn.; Potamogeton canariensis Link; Potamogeton drucei Fryer; Potamogeton fluitans subsp. americanus Graebn.; Potamogeton fluitans f. brevifolius G.Fisch.; Potamogeton fluitans f. congestus G.Fisch.; Potamogeton fluitans f. latifolius G.Fisch.; Potamogeton fluitans var. novaeboracensis (Morong) Graebn.; Potamogeton fluitans var. robustus Tab.Morais; Potamogeton fluitans f. spathulifolius G.Fisch.; Potamogeton fluitans var. stagnatilis W.D.J.Koch; Potamogeton indicus Roxb., nom.illeg.; Potamogeton insulanus Hagstr.; Potamogeton leschenaultii Cham. & Schltdl.; Potamogeton lonchites var. novaeboracensis Morong; Potamogeton machianus ; Potamogeton malaianus Miq.; Potamogeton mascarensis Cham. & Schltdl.; Potamogeton mexicanus A.Benn.; Potamogeton montanus C.Presl; Potamogeton natans var. canariensis (Link) T.Durand & Schinz; Potamogeton natans f. capensis Kunth; Potamogeton natans var. capensis T.Durand & Schinz, nom.illeg.; Potamogeton natans var. mexicanus M.Martens & Galeotti; Potamogeton natans var. serotinus (Schrad. ex Schult. & Schult.f.) Boiss.; Potamogeton nodosus f. angustissimus Hagstr.; Potamogeton nodosus f. brevifolius (G.Fisch.) Soó; Potamogeton nodosus f. congestus (G.Fisch.) Soó; Potamogeton nodosus f. latifolius (G.Fisch.) Soó; Potamogeton nodosus f. spathulifolius (G.Fisch.) Soó; Potamogeton nodosus var. stagnatilis (W.D.J.Koch) Soó; Potamogeton nuttallii var. portoricensis (Graebn.) Graebn.; Potamogeton occidentalis Sieber ex Cham. & Schltdl.; Potamogeton owaihiensis Cham. & Schltdl.; Potamogeton pensylvanicus var. portoricensis Graebn.; Potamogeton peruviana C.Presl; Potamogeton petiolaris Raf., nom.utique rej.; Potamogeton rotundatus Hagstr.; Potamogeton roxburghianus Schult. & Schult.f.; Potamogeton semicoloratus A.Benn.; Potamogeton serotinus Schrad.; Potamogeton stagnorum Hagstr.; Potamogeton syriacus Cham. & Schltdl.; Potamogeton thunbergii Cham. & Schltdl.);
Afghanistan; Albania; Algeria; Amur; Andaman Is.; Angola; Assam; Austria; Azores; Bahamas; Baleares; Baltic States; Bangladesh; Belarus; Belgium; Botswana; Brazil North; British Columbia; Bulgaria; Canary Is.; Cape Provinces; Caprivi Strip; Central European Rus; Chad; China South-Central; Chita; Comoros; Corse; Cuba; Cyprus; Czechoslovakia; Dominican Republic; East Aegean Is.; East European Russia; East Himalaya; Egypt; Ethiopia; France; Germany; Great Britain; Greece; Guatemala; Gulf States; Gulf of Guinea Is.; Haiti; Hawaii; Hungary; Illinois; India; Iran; Iraq; Italy; Jamaica; Jawa; Kazakhstan; Kriti; Krym; KwaZulu-Natal; Lebanon-Syria; Leeward Is.; Lesotho; Lesser Sunda Is.; Libya; Madagascar; Madeira; Marianas; Marion-Prince Edward; Mauritania; Mauritius; Mexican Pacific Is.; Mexico Central; Mexico Gulf; Mexico Northeast; Mexico Northwest; Mexico Southeast; Mexico Southwest; Morocco; Myanmar; Namibia; Nepal; Netherlands; New Caledonia; New Guinea; New Mexico; Niger; North Caucasus; North European Russi; Northern Provinces; Northern Territory; Oman; Pakistan; Palestine; Panam; Philippines; Poland; Portugal; Puerto Rico; Romania; Runion; Saudi Arabia; Senegal; Seychelles; Sicilia; Sinai; Socotra; South European Russi; Spain; Sri Lanka; Sudan; Sulawesi; Sumatera; Switzerland; Tadzhikistan; Taiwan; Tanzania; Tennessee; Thailand; Transcaucasus; Trinidad-Tobago; Tunisia; Turkey; Turkey-in-Europe; Turkmenistan; Ukraine; Uzbekistan; Vanuatu; Venezuela; Vietnam; West Himalaya; Western Australia; Windward Is.; Yemen; Yugoslavia; Zambia; Zimbabwe as per Catalogue of life;
Common name: Long Leaf Pondweed, American pondweed

Perennial, rhizomatous and aquatic. Stem branched, leafy, terete and simple. Leaves heterophyllous, submerged leaves petiolate, lanceolate or broadly lanceolate-oblong, veins 9 or more, thin translucent, 6-10.5 cm long; floating leaves broadly ovate, elliptic, coriaceous, of firm texture, 4-16 cm long, 2-5 cm broad, entire. Stipules free, keeled, lanceolate 2-15 cm long, 8-10 mm broad. Spikes cylindric, 4.5-11 cm long, 1.5-2.5 mm broad; peduncle 7-11 cm long. Flowers in whorls, sessile, small. Perianth segments small, obtuse, entire, c. 1.5 mm long. Stigma short. Fruitlets 3-4 mm long, 2-3 mm broad, obliquely obovoid, spongy, ventral margin convex, shortly beaked.

Flowering and fruiting: Throughout the year
Marshy areas
Indo-Malesia, Europe, Africa and America
(Attributions- D.r. N Sasidharan (Dr. B P Pal Fellow), Kerala Forest Research Institute, Peechi as per India Biodiversity Portal)


aquatic plant for ID 020311AM1:
identification needed for aquatic plant from bhopal

This is a species of Potamogeton. There are many species and they sometimes hybridise.

I think Potamogeton indicus

Potamogeton indicus is quite possible but I am not sure

MKS 1 : 8 posts by 5 authors. Attachments (2)
Collection: Sangamner, Maharashtra,
Habitat: Ponds
Collection” 2 september 2015
Collected By: Mahendra Khyade

were there any while flowers. not like any lily we know?

Could  it be Aponogeton species?

I was getting at the idea that this may be one of the aponogeton sp of
I think it may be the one called water hawthorn because the leaf shape 
but love to see the flower itself for definitive diagnosis
there are other aponogetons
AND SINCE you did take a plant ot two out, did you get to measure the leaves?? and get closer look at the roots and undersurface of the leaf?

The plant in the above photographs is Potamogeton nodosus (Fam: Potamogetonaceae).

“Potamogeton nodosus” : 3 posts by 2 authors. Attachments (3)- around 900 kb each.
Here are the pics of Potamogeton nodosus as requested by you.
Its an aquatic herb around 20cm high with its stem submerged.

Two more snaps of Potamogeton nodosus is enclosed..
Attachments (2) – 1 mb each.

Please help me to identify this aquatic plant: 5 high resolution images.
Date/Time- 21/04/2021
Location- Place, Altitude, GPS- West Medinipur, West Bengal
Habitat- Wild
Plant Habit- Rooted hydrophyte, with completely submerged leaf
Only a little part was outside the water
Inflorescence Type/ Size- Not found
Is it Potomogeton crispus?


There are two different plants here.
One with sinuate margins may be Potamogeton crispus L.
Other may be some Aponogeton species as per comparative images herein.

Please look into this.
I must say that is only one plant. Part which was above water had such strange leafs.
As I have collected and kept it in a freshwater tank, today I find that roots are emerging from that part.
I also attached a image which I captured just after uprooting the plant from its habitat.

I do not recall if I ever came across either of the two genera.
However, since the upper leaves are floating, as per “Bengal Plants”, it would be Potamotgeton indicus Roxb = P. nodosus Poir. – GBIF
Please, note Potamogeton has creeping rootstock, while Aponogeton features tuberous rootstock.


SK 3189 01 September 2021: 5 very high res. images.

Location: Mugu, Rara, West Nepal
Altitude: 2913m.
Date: 20 August 2021 
Habit : Wild
Aponogeton at this altitude or some other sp. ??

Yes, it appears so.

Pl. check with species at (from checklist of Nepal):

Potamogeton nodosus Poir. Please validate!

Yes it is

8 (7) Floating leaves with a discoloured joint at the top of the petiole; submerged leaves if present, reduced to narrowly linear, opaque phyllodes not more than 2 mm broad Potamogeton natans
+ Floating leaves without a discoloured joint at the top of the petiole; submerged leaves, if present, narrowly lanceolate to elliptic-oblong
 9 (8) Submerged leaves petiolate, lanceolate or broadly lanceolate-oblong Potamogeton nodosus


Aponogeton for id: 3 images.
Request for I’d of an aquatic plant from Bilaspur. It appears to me as Aponogeton. Photographed in April, 2023.

May be Potamogeton nodosus Poir., as per images and details herein.

I guess you are right

I hope this is Potamogeton nododus.


SK 3807 19 July 2023: 5 high res. images.

Location: Barsha Tal, Dhorpatan, Baglung, Nepal 
Date: 31May 2023
Elevation: 2900 m.
Habit : Wild
Potamogeton …  ???

Yes, it appears so.

To me appears close.


Identification request 0001: 3 images.
Habitat: Aquatic/River side

Habit: Herb
Location: Chambal River kota
Date: 11032024
PC: Priyanka Suman

What can it be ?

Seems Potamogeton. Flowers?

Agree ! Looks like Potamogeton !

I agree, but arrangement of leaves on the stem of the Potamogeton genus is typically alternate, meaning that each leaf is positioned at a different point along the stem, rather than directly across from each other. This alternate arrangement allows for efficient light capture and minimizes shading between leaves. This one has whorls of leaves.
Next, Potamegeton has floating leaves, and is an obligate aquatic plant, which cannot live on dry land.
I  believe, it is not potamegeton but an amphibious aquatic plant.

Yes, appears close to images at





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