Spirodela polyrrhiza ?

 
 

 
https://08511630493324166816.googlegroups.com/attach/457216581d7749c9/Aquatic1.jpg?part=0.1&view=1&vt=ANaJVrGesAH6LYHHtDGTFkUfWjVoqWtDrTun2wpUp3DJ0grkqBAHIK0e37OEiNmQ4P5cln7Ogorf5847seqWCUybv4c4qZymXCFrxLAPpuLZ3w6W-2dylZE



Aquatic plant for identification -1: Can you identify the small leaved free floating aquatic plant. I guess it is Wolffia, pls confirm. And also identify the species.
Location: Chennai
Date : October 2011
I m sorry for the large file size. I will reduce the photo with better programs next time. My other guess for this plant is is Lemna sps.
It may be Spirodela polyrhiza (Araceae). Fronds purplish beneath; and roots are many as seen in the posted picture.
I think there are more than one species floating there which is not so unusual.
Lemna, Spirodella, Wolffia.....
Please check...
Yes there are many species. But I am aiming at what Vijaysankar metioned as Spirodella polyrrhiza.
Here's one more close up of the same plant.


 
 
 
 
 
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