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Thanks for the article and photos. Last year I went to South America so I got to see bougainvillea in its natural environment. In the area near the Iguazu Falls where Brazil, Argentina and Paraguay come together I could observe them in the wild in the national park there. Most of the vines were purple-flowered, with an occasional red one. The vines scampered up the trees in the dense forest to find an opening in the canopy for their spot in the sun. In people's private gardens, there were many forms and colors, and most people treated them with some disdain since they will really take over. I live in California, USDA Zone 9 and Sunset Zone 14, and winter lows usually get down to 25-28 F so bougainvilleas are risky unless one can find the right location and microclimate in the garden. I've resigned myself to growing them in large containers that I can shelter over winter on my sun porch. Their exuberance and bright color make them worth the effort.