(b) Leaves stalked. 17. Speciosum. 18. Auratum.
Section IV.—Isolirion.
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.
Section V.—Martagons.
Perianth cernuous with the segments very revolute. Stamens diverging on all sides.
(a) Leaves in whorls. (α) American species; bulbs annual bearing rhizomes. 27. Canadense. 28. Pardalinum. 29. Superbum. 30. Lucidum. 31. Roezlii. 32. Columbianum. 33. Humboldti. (β) Old world species. 34. Martagon. 35. Avenaceum. 36. Hansoni.
(b) Leaves scattered, (α) Leaves lanceolate. Many-nerved. (i.) Perianth falcate above middle. 37. Monadelphum. (ii.) Perianth revolute to below middle. 38. Polyphyllum. 39. Ponticum. 40. Carniolicum. (β) Leaves narrow. With one or few nerves. (i.) Segments of the perianth from six to twelve lines broad in the middle. 41. Testaceum. 42. Leichtlini. 43. Batmanniae. 44. Pseudo-Tigrinum. 45. Wallacei. (ii.) Segments of the perianth from three to six lines broad in the middle. 46. Pomponium. 47. Chalcedonicum. 48. Callosum. 49. Tenuifolium.
Section VI.—Notholirion.