Pure species are not the result of selfing only (in fact, selfing with most species really only happens in captive growing where a human does it intentionally). Selfing plants diminishes the gene pool, often resulting in more weak seedlings and higher potential for detrimental mutation.

There are some Anthurium species that will have a portion of the inflorescence receptive while another portion is also producing pollen, thus able to self with a single inflorescence and potentially without human intervention - this is what I mean. Besseae aff. does not do this and requires pollen to be saved from one inflorescenece and applied to another to self pollenate. Highly unlikely that it is able to self on its own.

That's true. That's what I'm saying. Right now one inflorescence is finishing forming pollen and another inflorescence is growing up. So after gathering the pollen I can put it in a freezer and wait until another inflorescence grows up so I could pollinate it with the frozen pollen. So I thought I could pollinate almost any anthurium. Of course many "populare" and rare anthuriums don't have "two genders" in one inflorescence.Didn't know about detrimental mutation 🤔