I think you have mixed up the two
The the last four had much smaller flowers, was potographed some distance away from Dakpathar ajnd should be Chamaecrista pumila. The first four should be C. mimosoides.
Dr. Gurcharan Singh
Retired Associate Professor
SGTB Khalsa College, University of Delhi, Delhi-110007
Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018.
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