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