Back-lit Night Blooming Cereus....Had this plant for 40 + years, about 5 ft. tall and I trim about 4 ft. off per year. A native of the Sonoran desert in North America. The bud starts to open about dusk, the photo taken at 10:45 pm,by 9:00am the next morning its wilted. Bloom is approx. 10 inches in dia. Note the moth attracted by the sweet smell. Smell is produced in bursts,very sweet.