Lily of the Valley (Convallaria majalis) is from the Ruscaceae family (genus Convallaria).    From Wordnik.com.  [Urban Lily] Reference

The Ponytail Palm was formerly considered a member of the lily family, but has been reclassified as a member of the Ruscaceae family.    From Wordnik.com.  [BellaOnline - The Voice of Women] Reference