The APG II system , of 2003 ( unchanged from the APG system , 1998 ) assigns it to the order Poales in the clade commelinids in the monocots .
Head entity: apg system Q433179 11 12
Tail entity: apg ii system Q156518 1 2 3
Relation (head \u2192 tail): P155
Inverse relation (tail \u2192 head): P156