Paper flower is a thorny climber native to Brazil, grown outdoors in warm U.S. regions and in containers where winters are cold. Its papery pink or purple parts are modified leaves called , surrounding tiny white flowers.
The two look very similar. Great bougainvillea often has soft hairs on the leaf undersides, while lesser bougainvillea leaves are usually smoother. Close flower photos can also show the five-angled tube of lesser bougainvillea.
Why they get mixed upBoth are grown as colorful climbing ornamentals.