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This is the fruit of a Pterocarpus indicus tree. It is a samara, having somewhat like a thin membrane that acts as "wings" that help it disperse its fruit. Pterocarpus indicus, or the New Guinea Rosewood, is a large tree. It's a good source of lumber, since it is very hard and durable.
This was found below my High school's auditorium. So, I actually didn't know where it came from.
The New Guinea Rosewood is called "Narra" here in the Philippines and is our national tree.