pygmaecereus bylesianus

I also like these a lot - the simple white with those olive-green petals at the back.

Cacti flowers always look so perfect :)

lovely

it only flowered for one night...i just happened to go to the cacti house early one morning and was lucky enough to see it. by lunch time it was over....but sooo pretty.

Fantstic picture

SUch wonderful blooms, this is one of my favs so far. Glad you caught them, with such a short bloom period. Really special.