Harrisia
Harrisia is a genus of night blooming cacti native to Argentina, Paraguay, Brazil, Bolivia, Uruguay, the Greater Antilles, the Bahamas, and the U.S. state of Florida. Of the 20 or so species only a few are in cultivation. The best know Harrisia, Harrisia jusberti is believed to be an inter-generic hybrid of H. pomanensis and Echinopsis eyriesii. All species have large nocturnal, white flowers which are very fragrant.