Euphorbia species- Sagar Upvan, Mumbai

Attached is a picture of a plant captured in Sagar Upvan, Mumbai in February 2013.
Requested to please provide ID.
Perhaps it is Euphorbia trigona
It is not possible to fix its identity seeing only a small upper portion of the branches. It could be E. caducifolia, E. cattimando, E. royleana or E. trigona. It could even be an exotic garden plant.
Thank you ... for the feedback.
Hopefully I shall capture the complete plant next month when I will be going there....