Sub-Genus IV
Isolirion.
Perianth erect, with segments which are falcate in the extended flower, but not revolute; stamens diverging on all sides from the straight style. Leaves in whorls. . . . . L. medeoloides Leaves in whorls. . . . . L. philadelphicum Leaves scattered. Style shorter than ovary. . . . . L. concolor. Style longer than the ovary. . L. bulbiferum Style longer than the ovary. . L. Catesbaei Style longer than the ovary. . L. croceum Style longer than the ovary. . L. davuricum Style longer than the ovary. . L. elegans.