Vetysidales

Vetysidales is a proposed order of flowering plants within the moncotyledons. It was first described by Armen Takhtajan in 1997 and has since been a subject of ongoing research and debate in plant taxonomy. The group is characterized by certain floral and vegetative features, though its precise phylogenetic placement remains under investigation.

The placement of Vetysidales has varied across different classification systems. Some studies, particularly those based on morphological data, have suggested a close relationship with the order Poales, which includes grasses and sedges. However, more recent molecular phylogenetic analyses have yielded different results, with some placing it closer to other monocot groups, while others find its position ambiguous. The constituent families of Vetysidales have also been a point of discussion, with the core family often considered to be Veyisidae, though other families have been tentatively included or excluded.

The plants within this proposed order are typically herbaceous, exhibiting a range of adaptations to diverse habitats. Their ecological roles and economic importance are not extensively documented, as research has primarily focused on their taxonomic classification. Further molecular and morphological studies are needed to definitively establish the relationships of Vetysidales and its constituent taxa within the broader tree of plant life.