What floating plant is this (Part II)

[Green Baron]

I just got a new floating plant from Barbarik which I have not seen before :



This is a photo of the different type of floaters in my tank :


A= This is the plant discussed in this thread by Ronnie. Tentatively Id as Pista stratiotes (Water Lettuce)
B= Salvinia natas ?
C= Limnobium laevigatum (Frogbits)
D= Lemna sp (Duckweeds)
E= Unknown ID ? (ID update: Spirodela polyrhiza)

[RonWill]

Gan, have never seen it before but that's one more floater I'd like to have in my tanks. Find it strange tho, that the underside is a nice pinkish color... cool!

B= Calvinia natas ?
Should be Salvinia natans.

[Green Baron]

Gan, have never seen it before but that's one more floater I'd like to have in my tanks. Find it strange tho, that the underside is a nice pinkish color... cool!

Yes, it is lovely. I know you would love it. Will pass some to you the next time we meet.

BTW, I saw a new species of Vals at Nature Aq. It has very long and thin leaves, 2~3mm wide and looks like Crypt tonkinensis. NA don't have any for sale but the shop next to it has quite a lot, selling at $2.00 per bunch. I should have bought some for you

B= Calvinia natas ?
Should be Salvinia natans.

Thanks. Corrected the typo

[Robert]

Hi Gan,
your unknown plant looks similar to Spirodela polyrhiza, which is a native plant in a Europe. It's a kind of duckweed but it is much bigger than Lemna minor.

This is a picture of Spirodela polyrhiza together with Lemna minor:



This is the same species but from below:



Could please post here the size of the leaves of your plant? It would help us to ID this plant.

regards

Robert

[Green Baron]

Hi Gan,
your unknown plant looks similar to Spirodela polyrhiza, which is a native plant in a Europe. It's a kind of duckweed but it is much bigger than Lemna minor.

Robert,
It does look like Spirodela polyrhiza in your photo.

Could please post here the size of the leaves of your plant? It would help us to ID this plant.

You can tell the size of the plant by comparing it to the Lemna minor in my photo.

The diameter is about 6mm~8mm

[juggler]

Gan: For your "B= Salvinia natas" in above picture, I am not sure if it is the same floater as what I've got. It may take a different form under different conditons of light/ nutrients.


This was what I got from Teo Farm.


This was what it changed into in the aquarium. With smaller leaves and more spread out.

[RonWill]

...not sure if it is the same floater as what I've got. It may take a different form under different conditons of light/ nutrients

Koah Fong, you're correct in that light and nutrient has great influence on floaters. The first form of the S. natans is usually found under direct sun, in good nutrient and generally has longer, thicker roots. The 'lifted' leaves are due to space competition if the pool is packed with them. Older tanned leaves have a brown tinge.

In our tanks, especially in ambient lighting, leaves are what you see in the 2nd image. There's more space to roll up their sleeves and relax... or just spread flat on the surface :wink:

What Gan has looks like Frogbits, but they aren't.