This is the 4th of 9 flowers of this Epiphyllum oxypetalum in 2008. Watch the stamens dance. It is in my lab at Fox Chase Cancer Center in full sun behind glass. It took me 10 years to catch the blooming. This one was shot with photography lighting, 30 sec per frame. You can download the higher resolution file at labs.fccc.edu/yeung/portal/tiki-download_file.php?fileId=336