Herb

Not saprophytes

Perianth petaloid

Ovaries superior

Radial symmetry

Leaves all basal

Not umbels

Not Xyris

Leaves not in fans

Leaves flattened

Flowers hermaphrodite

Leaves not massively fleshy

Perianth parts free

Filaments not hairy

Upright plant

Filaments wide at top or bottom

Filaments flattened

Bulbs

Flowers blue