One of the latest, best, and most generally accepted classifications is the following division of the genus into six groups thus—
Section I.—Cardiocrinum.
Perianth[3] funnel-shaped, with oblanceolate[4] segments, falcate[5] only at the apex. Leaves heart-shaped, ovate, and stalked, 1. Cordifolium. 2. Giganteum.
Section II.—Eulirion.
Perianth same as Cardiocrinum. Leaves linear or lanceolate, not stalked.
(a) Tube scarcely widened from base to middle. 3. Philippinense. 4. Wallichianum. 5. Longiflorum. 6. Neilgherrense.
(b) Tube widened from neck to base, (α) Leaves scattered. 7. Japonicum Odorum. 8. Brownii. 9. Krameri. 10. Nepaulense. 11. Candidum. 12. Belladonna. (β) Leaves in whorls. 13. Washingtonianum. 14. Parryi.
Section III.—Archelirion.
Perianth open and funnel-shaped. Segments deeply spreading and broadest about the middle. Stamens diverging from the style, which is curved.
(a) Leaves sessile. 15. Tigrinum. 16. Oxypetalum.