Perianth as distinct calyx and corolla is not organized inI. Lily                              II. Gloriosa                              III. Smilax                      IV. Datura

Usually in monocots the perianth is not organized as distinct calyx and corolla. It looks like either calyx or corolla as in case of Liliaceae members like Lily, Gloriosa and Smilax. Datura is a dicot and shows clear distinction of perianth into calyx and corolla.