Perianth erect. Segments falcate, but not revolute. Stamens diverging
on all sides.
(_a_) Leaves in whorls. 19. _Philadelphicum._ 20. _Medeoloides._
(_b_) Leaves scattered, (α) Style shorter than ovary. 21. _Concolor._
(β) Style longer than ovary. 22. _Bulbiferum._ 23. _Croceum._
24. _Davuricum._ 25. _Elegans._ 26. _Catesbaei._