Ravi ji
while sending photographs for ID please take care about a few things
1. There should always be a unique subject line not not simple words like ID required
2. You should always provide some necessary information: whether the plant is wild or cultivated, habitat, place it was growing, approximale size of plant, leaves and flowers/flower heads.
3. Both plants Centrostachys and Gomphrena belong to Amaranthaceae and not Acanthaceae.
4. The first photograph belongs to Gomphrena gobosa and second to Gomphrena celosioides.
5. Centrastachys aquatica is a totally different plant as shown in the link below
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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/