1	"Flower with corona"	2
1	"Flower lacking a corona"	5
2	"Perianth and corona white; leaves 2-35 cm wide"	3
2	"Perianth white, yellow, pink or purple; corona yellow, orange or pink; leaves 0.5-2.5 cm wide"	4
3	"Leaves with petiole 7-6 cm long; flowers with pedicels 7-45 mm long; perianth lobes 0.6-4 cm long"	Proiphys
3	"Leaves sessile; flowers sessile; perianth lobes 7-11 cm long"	"Hymenocallis {Hymenocallis caribaea}"
4	"Perianth and corona yellow or perianth white and corona yellow or orange; corona margin crenulate-undulate; perianth lobes widely spreading; perianth tube 1.5-2 cm long"	Narcissus
4	"Perianth and corona purplish or perianth yellow and corona yellow or pink; corona margin not crenulate-undulate; perianth lobes slightly spreading; perianth tube 0.4-1.2 cm long"	Calostemma
5	"Perianth segments free or only shortly fused"	6
5	"Perianth segments conspicuously fused"	9
6	"Anther dehiscence apical"	"Leucojum {Leucojum aestivum}"
6	"Anther dehiscence longitudinal"	7
7	"Anther filaments swollen at base"	Nerine
7	"Anther filaments not swollen at base"	8
8	"Flowers in umbel; leaves 15-30 mm wide; scape solid"	"Amaryllis {Amaryllis belladonna}"
8	"Flower solitary; leaves to 4 mm wide; scape hollow"	Zephyranthes
9	"Flowers 2 or more per umbel"	Crinum
9	"Flowers solitary"	10
10	"Perianth yellow, the tube usually 5-8 mm long"	"Sternbergia {Sternbergia lutea subsp. lutea}"
10	"Perianth white or pink, the tube more than 10 mm long"	11
11	"Flowers sessile; perianth tube 7-13 cm long"	Crinum
11	"Flowers with pedicels 1.5-2 cm long; perianth tube c. 1.5 cm long"	Zephyranthes