Wikipedia
Calochortoideae
The Calochortoideae are a subfamily of monocotyledon perennial, herbaceous mainly bulbous flowering plants in the Liliaceae (lily) family. Approximately the same group of species has been recognized as a separate family, Calochortaceae, in a few systems of plant taxonomy, including the Dahlgren system. They are found predominantly in the temperate regions of the Northern Hemisphere, particularly East Asia and North America.