Collected from pond in Vellore(Tamilnadu- India). is it Spirodela?
Are you sure that this plant is a water fern? It seems rather a Lemnoideae species (Araceae), probabily a species of Spirodela. It could be Spirodela oligorhiza.
i collected it from a pond so i used the term "water fern"..correct me if i am wrong...Thank you for all your answers...
It is not a fern but an aquatic angiosperm species Spirodela polyrhiza of the family Lemnaceae. Commonly called duckweed.
Lemna has just a single root per unit, this one has several. Therefore, it has to be Spirodela.
Lemna minor would be smaller.
And Spirodela has a sulcate surface just as seen on te 6th photo.I vote for Spirodela polyrhiza.
Water fern: genus of seven species: Aquatic ferns: Family Salviniaceae (Ceratopteris)
Please have look at these websites for Lemnaceae identification:
http://waynesword.palomar.edu/1wayindx.htm
https://gobotany.newenglandwild.org/species/landoltia/punctata/
They may be helpful.
The size, thickness, the shade of green above and the purple on the undersurface of the thalli in the photographs all indicate Spirodela. I considered S. punctata (Syn. Landoltia punctata) but the thalli in the photographs are too large and not elongated enough. That leaves Spirodela polyrhiza, so I agree with Jacek Drobnik. S. polyrhiza can have up to nine roots per thallus, but the smaller number in the photographs could be simply due to damage when sampling, or perhaps it's just an atypical population.
When is a fern not a fern? When it is in the poppy family of Pteridophyllum racemosum. Japanese fern mimicry.
I could not understand this question of Misty Walker. Ferns are primitive groups of plants which reproduce by means of spores which are produced on leaves. They do not produce flowers, fruits and seeds for reproduction.
Angiosperms are those plants produce flowers, fruits and seeds for reproduction.
But there are flowering plants which looks like ferns in shape of leavews. A good example is Pteridophyllum racemosum, where the leaf look like that of a Fern. But it produces flowers, fruits and seeds as any other Flowering plant.
A fern always is a fern and a flowering plant always is a flowering plant.
I think , it is not a fern.
It will be a small aquatic plant belonging to Lemnaceae Fam.
If you see one rhizoid on the lower side then should be the genus Lemna, or wolfiaif there are several rhizoids then it will be Spirodella.
Best regards
A. A. Maassoumi
its not a fern but a flowering plant, probably lemna gibosa
it also cant be Spirodela polyrhiza, because it dosent have multiple roots
I agree with Mehdi, it is a Lemna because of having only one root per thallus and having roots (vs. Wolffia and Wolffiella). That it is L. gibba is different matter.
Steve
Yes, it is Spirodela polyrhiza (Lemnaceae). It has multiple roots which can be seen clearly in the photo number 4.
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