Identifying this white wildflower

Question

I photographed this flower in Grenada in November of last year. The flowers were small (roughly 1½ in or 4 cm in diameter), white, with 5 narrow petals. There was just one flower on a stem, and one stem per plant (at least on the ones I saw); the plants had toothed leaves. It was growing wild near the Grand Etang Lake.

^{Click for larger view}

I did numerous Google searches, but could never find a match. I eventually found one image that looked pretty much identical, but the original page no longer exists, and (according to the Wayback Machine) it apparently didn't provide an identification anyway. Would anyone be able to point me in the right direction?

Answer 1

Apparently I only needed one more Google search after posting this question. I finally found a page showing a similar flower, identifying it as a Hippobroma longiflora (commonly called a Star of Bethlehem). Googling again for that scientific name I was able to find plenty of examples that confirmed this identification.

_{Photos credits George Shepherd, Dinesh Valke}