We've put together a list of the hardy and non-hardy bulbs that require a resting or dormant period to induce flowering:

Hardy

• Anemone biflora
• Anemone tschernjaewii
• Bellevalia (some spp.)
• Bongardia (Lady's nightcap)
• Calochortus (spp. only) (Butterfly tulips)
• Colchicum (most spp.) (Autumn crocus)
• Corydalis (some spp.)
• Crocus (most spp.)
• Cyclamen (some spp.)
• Gladiolus
• Iris (Onocyclus group)
• Leontice
• Merendera (most spp.)
• Narcissus atlanticus
• Narcissus cantabricus
• Narcissus marvieri
• Narcissus romieuxii
• Narcissus rupicola
• Pancratium
• Romulea (spp. only)
• Tecophilaea cyanocrocus (Chilean blue crocus)

Non-Hardy

• Leucocoryne
• Moraea (winter-growing spp.)
• Narcissus watieri
• Ranunculus asiaticus (Turban buttercup)
• Tigridia