11102011-BS-1 Aquatic herb for id from Pujam Karnal

[Balkar Singh]

Dear All

Wild Aquatic herb for id from Pujam Karnal

Leaves floating flowers was about 3-4.5 cm white 

Pls id

Thanks

--
Regards

Dr Balkar Singh
Head, Deptt. of Botany and Biotechnology
Arya P G College, Panipat
Haryana-132103
09416262964

[Ritesh]

Looks like Hydrocharis sp. to me.

Regards,
Ritesh.

[Dr Pankaj Kumar]

Yes Hydrocharis sp.
Pankaj

[Balkar Singh]

Dear All

I think i found the correct id for this plant

Sagittaria guayanensis Kunth

pls see

http://www.theplantlist.org/tpl/record/kew-287263

http://www.westafricanplants.senckenberg.de/root/index.php?page_id=14&id=1378

http://plantes-rizieres-guyane.cirad.fr/monocotyledones/alismataceae/sagittaria_guayanensis

http://www.westafricanplants.senckenberg.de/images/pictures/Sagittaria_guayanensis_MS_4236_1378_51c9fb.JPG

pls validate

This plant is not on FOI

Tabish Ji you may pls add this to FOI

Thanks

[Gurcharan Singh]

Yes Balkar ji

It was a tough competition but your photograph number 7, 10 and 13 seem to be clinching the issue. Otherwise leaf size and shape in two is similar, most flowers of Sagittaria are bisexual (clinch the issue) although some male flowers in later flowers were creating doubt , with both having up to 10 stamens, and male flowers of Hydrocharis also in groups of 2-3 like S. guayanensis.  Flowers, however, are larger in Hydrocharis, 4 cm across as compared to 2 cm in S. guayanensis. You may have checked on this.

-- 
Dr. Gurcharan Singh
Retired  Associate Professor
SGTB Khalsa College, University of Delhi, Delhi-110007
Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018.
Phone: 011-25518297  Mob: 9810359089
http://people.du.ac.in/~singhg45/ 

[Gurcharan Singh]

Balkar ji

Please make sure all photographs belong to same plant. Flower diameter should be 1.5-2 cm in Sagittaria guayanensis, but 4 cm in Hydrocharis. Plus Sagittaria has free carpels with numerous achenes, Hydrocharis united carpels (single ovary) with usually six bifid stigmas. 

But then acutish basal lobes and deep go with Sagittaria, Hydrocharis has shallow sinus with distinctly rounded basal lobes.

-- 
Dr. Gurcharan Singh
Retired  Associate Professor
SGTB Khalsa College, University of Delhi, Delhi-110007
Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018.
Phone: 011-25518297  Mob: 9810359089
http://people.du.ac.in/~singhg45/ 

[Balkar Singh]

Sir, Flower size was about 2-2.5 cm only These were two different plant i shot there but of same species. This plant also commonly grows in Rice fields where flower size does not exceed 1.5 cm. And yes i remember the fruit free carpels. Adding 1 more pic of this plant

thanks Sir for the so much research for this plant