contains the alismatids, a group of monocotyledons
. At one point there were various distinct orders, but it seems they tended to be polyphyletic[?]
, and so the whole group has been mushed into a single order. Families include:
The Triuridaceae[?] and Petrosaviaceae[?] have been placed here, but there actual affinities are not so clear. The alismatids as are the sister group of the Arales and the latter have sometimes been included here.
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