Alismatales

Order Alismatales 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:

• Family Alismataceae[?]
• Family Limnocharitaceae[?]
• Family Butomaceae[?]
• Family Hydrocharitaceae[?]
• Family Najadaceae[?]
• Family Aponogetonaceae[?]
• Family Scheuchzeriaceae[?]
• Family Ruppiaceae[?]
• Family Cymodoceraceae[?]
• Family Posidoniaceae[?]
• Family Potamogetonaceae[?]
• Family Zannicelliaceae[?]
• Family Zosteraceae[?]
• Family Juncanginaceae[?]

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.