Almost impossible to ID cold without seeing it in flower or already having prior knowledge of the plant.
Most of the many thousands of wild plant species still extant are found in the tropics. Probably about the only way you would happen to find the same one on the internet would be if you were looking at pages on the wild plants of the area where this one grows - and this same one happened to be shown. Where old growth forests are left in humid tropical regions there can be hundreds of plant species growing on a single small plot. Just the tree species alone can run into the hundreds, almost every individual of much size belonging to a different species. And it is still quite possible to encounter new, undescribed plant species in tropical forests.
I guess it is possible. Since this picture was taken within inches of a very popular hiking trail (Reef Bay trail), it would seem unlikely to be "new". Also, I doubt there is any old growth forest on St. John.
Does St. John have any higher education establishments with a webiste where you might be able to find a local expert to identify the pic?
I mentioned climax forest in humid tropics as example of conditions there, not with the idea that you were dealing with that situation specifically.
