Erythroniaceae Martynov Fritillariaceae R.A.Salisbury Liriaceae Batsch Medeolaceae Takhtajan Tulipaceae Batsch The Lilioideae are a subfamily of monocotyledonous perennial, herbaceous mainly bulbous flowering plants in the lily family, Liliaceae.

They are found predominantly in the temperate and colder regions of the Northern Hemisphere, particularly East Asia and North America.

Lilioideae genera are relatively homogeneous and distinct from the other two Liliaceae subfamilies (Calochortoideae and Streptopoideae).

They are perennial herbaceous flowering plants that are mainly bulbous (Lilieae) with contractile roots, but may be rhizomatous (Medeoleae).

[5] In 1927, Buxbaum's treatment of the subfamily included three tribes; Lloydieae (Gagea, Lloydia and Szechenya and Giradiella — both now included in Lloydia), Tulipeae: (Erythronium, Tulipa and Eduardoregalia — now part of Tulipa) and Lilieae (Korolkowia, Fritillaria, Notholirion, Cardiocrinum, Nomocharis and Lilium).