Hippeastrum (aka Amaryllis) Family
This very popular holiday plant is one of the most widely grown bulbous plants in the world. While it is often forced to bloom in the shortest, darkest days of winter in temperate zones, it is a popular landscape plant in subtropical zones. Northern gardeners sometimes even treat it as a summer flowering bulb that is planted after the last frost in spring. More from the US National Arboretum web site.