ELI5 — How do plant species make use of mimicry like mimetic polymorphism or pouyannian mimicry without the senses of sight or smell, for example, to “know” what to mimic?

ELI5 — How do plant species make use of mimicry like mimetic polymorphism or pouyannian mimicry without the senses of sight or smell, for example, to “know” what to mimic?