Perennial herbs with bulbs. Leaves simple with parallel veins. Inflorescences terminal or axillary, in umbels or flower solitary, often with one or few spathes. Flowers bisexual, usually actinomorphic. Tepals in 2 whorls, united into a tube or free, sometimes with a conspicuous corona. Stemens 6, free or sometimes united into a false corona, often inserted at the throat of perianth tube; anthers dorsifix or medifix, often versatile. Ovary inferior, 3-loculate, with axillary placentas; ovules 1 to numerous per locule. Fruit capsular, loculicidally dehiscent or irregularly ruptured, or a berry. Seed globose or irregular, sometimes flat or winged.
A cosmopolitan family of about 60 genera and 850 species, two genera and six species are indigenous to Thailand.
KEY TO THE GENERA
1. Leaf sessile or with indistinct petiole, lingulate, ensiform or linear-lanceolate 1. Crinum
1. Leaf with distinct petiole, broadly ovate, cordate or subobicular 2. Proiphys