This white echinopsis flower greeted me when I went out onto the patio this morning. I also saw eleven cereus cactus flowers. This was the unique one today, though. Click on the image to enlarge.
According to the label on the planter:
The genus echinopsis, native to South America are globular cacti that are quite cold tolerant. They produce white, yellow, pink or lavender flowers in the Summertime.