Geoffroea-decorticans and cacti

[Giannhs]

Hi!
Ggeoffroea-decorticans is a very hardy and very productive tree as they describe it, i have not yet grown it, and i thought it is self fertile since it belongs to the Fabaceae, and the Fabaceae, to my knowledge, are self fertile plants. However, i found a web page were it says
"Pollinators: Bees, Insects
Self-fertile: No"
And it says nothing more about it. I m thinking, maybe they don't call it self fertile because it needs bees and insects to fertilize it? Or is it dioecious, or the male organs open not at the same time as the female ones? In short, i wish to know what makes it not self fertile, if it is really so.
And by the way, what is your knowledge about cacti (stenocereus), are they monoecious or what?
Thank you!