Offsite photos of three species of the Hymenocallis genus: carolinianna (umbel of 5 to 10 spidery flowers), palmeri (single spidery flower), floridana (two flowers) and the rotata photo I took. Below photo does not have spidery leaves, even smooth edges and 3 flowers per plant. Difficult to tell the species apart, except maybe identifying by number of flowers on stalk.

Photograph