Creeping medicinal herb in Sri Lanka

 
 
https://08511630493324166816.googlegroups.com/attach/1eb12e86c54d4a61/ASP%2072.JPG?part=0.1&view=1&vt=ANaJVrGbQKPp1XsyLmClYE18Vs_yqkt6ng222aZOEwuChjlaEUORLvn3xMTQbSHITRQzT8lxIUU5SfpMn12Gz8XVRXRnkm7E-JUyoIEGrSlwh2GiEslCJ6E
 
Can you please ID this creeping medicinal herb. Photo was taken in Sri Lanka in Nov 2012.
 
 
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