I see what you're saying. On my part if someone asks for something with a generic common name and they don't provide the latin or a picture or link to a picture of what they want, I always ask them to be a bit more specific. That's an ongoing problem with Corkscrew/Snail Vine - both Vigna caracalla and the two common names used interchangeably if you're not all that familiar with it. There is a definitive difference between the two - one is multicolor and the other solid lavender. In cases like that I always provide pictures of both to see which one they are actually looking for.
