Blooming cactus!

In the arid greenhouse this morning there are three flowers on our Peruvian apple cactus (Cereus peruvianus). These flowers open at night to be pollinated by bats. These are the most open I’ve seen the flowers, because I happened to arrive at the greenhouse early this morning. The photos were taken around 8:00 am, and I expect the flowers will fade quickly this morning. The energy investment into such large flowers is considerable, which makes it all the more striking that they should open for only one night. A rare reward for night-owls (or bats?) and early-risers alike!