This is a photo of cactus flowers opening.
From National Geographic about this, with more photos there:
Cactus Flowers: Mother Nature’s Fireworks
Did you know that cacti can bloom? Yes, those prickly green plants burst out some of the most beautiful flowers you’ve ever seen.
For photographer Greg Krehel, these crazy cactus flowers have become an obsession.
“Since I was a kid I’ve always loved succulents and cacti. One year I ended up at a local garden shop and picked up [a] cactus for my collection. A couple years later it put out these awesome flowers, unlike others I had seen. It just kept blooming. It really went to town.”
Note: Many of these cacti are hybrids that were bred and cultivated by different individuals, hence the unusual names.
After seeing these stunning blooms, Krehel decided he needed to know more about the breed of cactus he had…
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