When I was young, the arbors were covered in dark purple bougainvillea. As time went by the wood rafters rotted out. The bougainvillea was not replaced when the rafters were replaced. The city thought the bougainvillea caused the wood to rot (well... maybe it did a little sooner). Now we have red ones that will be very nice, but it will be harder to control then the purple ones. Click here to see the arbor. If you google bougainvillea you will find it spelled at least three ways.