Gabe15

People use the term "species" loosely and often incorrectly, for clarity reasons, I like to use species only in reference to wild plants. Although edible bananas may be considered a species by some (I disagree on this though), the phrases "different varieties" or "cultivars" clarify that it is an edible banana in most cases. Many people call different cultivars "species" and it can get quite confusing, but such is banana taxonomy in general.

So what I would guess for this vendor is that they are meaning to say "different varieties" which would make a lot more sense. However, variegation is a relatively common trait and it would not be unusual to find lot of different true wild species available as variegated plants because any banana can become variegated, although even in this case they would not be naturally variegated plants collected from the wild, they would be sports from a nursery.

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Growing bananas in Colorado, Washington, Hawaii since 2004. Commercial banana farmer, 200+ varieties.