The aptly named 'Prosperity', a hybrid-musk climbing rose. I've had it growing in my garden for probably three years—the main cane is now about the width of a wine bottle. It's always blooming somewhere, but when the fine weather of our dry season kicks in, the bush is just covered in huge hands of pure white blooms with vivid yellow stamens and anthers. The fragrance is really unremarkable, though my reference books say otherwise (and commonsense, too—musk roses have long been considered the most odiferous of the garden roses).
It's a very vigorous rose, growing on 'Fortuniana' stock here in Florida.