Xyridaceae
The APG II system , of 2003 ( unchanged from the APG system of 1998 ) , also recognizes this family , and assigns it to the order Poales in the clade commelinids , in the monocots . 
<triplet> Poales <subj> commelinids <obj> parent taxon <triplet> commelinids <subj> monocots <obj> parent taxon