Bougainvillea is a genus of flowering plants native to South America from Brazil west to Peru and south to southern Argentina (Chubut Province).
Different authors accept between four and 18 species in the genus.
The name comes from Louis Antoine de Bougainville, an admiral in the French Navy who discovered the plant in Brazil in 1768. (Wikipedia)
This is a branch pruned from a friend's bush in Arraijan, Panama.
I had to scan it in two parts and join them in Photoshop.