I found this wonderful purple Bougainvillea tree in an empty lot, just off of the road. The Bougainvillea are in full bloom all around the area right now in Los Angeles. They are just so beautiful!
Here are some older pictures of a brighter red one that was covering the wall all along the freeway:
Some multicolor found at the Huntington Botanical Gardens:
Learn more about these beautiful plants: http://en.wikipedia.org/wiki/Bougainvillea