Liliaceae here include only Erythronium and Lilium; the remaining genera are assigned to Agavaceae, Alliaceae, Asparagaceae, Convallariaceae, Hemerocallidaceae, Hostaceae, Hyacinthaceae, Melanthiaceae, Smilacaceae, and Trilliaceae.

1. Leaves basal.

Erythronium

1. Leaves cauline

2. Leaves numerous on a tall (ca. 0.4-2 m) stem; anthers attached to the filament at the middle.   

Lilium

2. Leaves few (< ca. 5) on a short stem less than 0.5 m tall; anthers attached to the filament at the base.

Tulipa