I seriously doubt you will be able to get a positive ID, since even botanist have such a difficult time agreeing on this genus. Here is an article ( very long) on the confused history of Crinums. My guess is that it is going to be one of the Crinum americanus "series", but would be nearly impossible to exactly which one.
About two thirds down the article is a section about Crinum americanus.
http://www.crinum.org/review.h...
