Del Valle Jamaica & nada

Am I wrong in thinking that jamaica and hibiscus are the same thing (also sorrel)? I'm pretty sure they are the same. I would look it up, but I'm in Mexico and I don't have internet access. So I will assume they are one and the same. I'm not positive what nada is, but I think it's the same fruit as I bought from some cart earlier with chili powder and lime. At least that's what I think the vender said. My Spanish is minimal and a lot of people talk very fast down here. I digress; this is sparkling mineral water with juice added. It's fairly sweet and floral. I like it, but it was a bit much to get through the whole bottle. I kind of wish I had went with the lime instead. All I really want to consume down here involves limes. This has been a fairly uninformative review, but it's what you're going to get, because I don't know what else to say about it.