I was wondering the same thing. My first thought was that perhaps here "coffee" is being used in this popular press article as a shorthand for a relative of th

I was wondering the same thing. My first thought was that perhaps here "coffee" is being used in this popular press article as a shorthand for a relative of the coffee plant, but I haven't been curious enough to dig up the five "coffee" species names and research them. I'm not particularly knowledgable about coffee (I'm not even sure if arabica is a sub-species or proper species), but I would be surprised if there are 5 proper species of coffee used commercially.