Self-pollination in Echinopsis?

Hi. My daughter was given an Echinopsis cactus (I think E. oxygona) which has very showy and short-lived flowers which have just been in bloom. Initially what I understand is the pistil sticks out beyond the stamens, but as the flower dies off, the pistil shrinks first and drags across the still erect anthers as it goes. Is this some sort of self-pollination, or just happens to be how the flower wilts?

If it is a self-pollination mechanism, are there any or many other plants that do the same thing?

Thanks for any replies.

I’m not sure if any other plants do the same thing as a means of self-pollination, but E. oxygona (and most other Echinopsis for that matter) is self sterile.


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