If the first plants you think of when you hear "cactus" are those immense, multi-branched Saguaro cactuses (Carnegiea gigantea) so frequently featured in cowboy movies, you should know there are over ...

This is a preview. Log in through your library . Abstract Resource and pollen limitation, as well as pollen/ovule incompatibility, have been proposed as causes to explain fruit abortion. To assess ...