How are Pandanales related to other monocot orders such as Asparagales and Liliales?

In the Angiosperm Phylogeny Group IV (APG IV) classification system, Pandanales, Asparagales, and Liliales are all recognized as distinct orders within the monocotyledons (monocots).1

These orders are categorized together under the "non-commelinid" group of monocots. Within this evolutionary framework, they are considered related because they share the fundamental characteristics of the monocot lineage, including:1

• The presence of a single cotyledon in the seedling.1
• Vascular bundles that are scattered throughout the stem.1
• Leaves that typically feature parallel venation.1
• Flowers that most often have parts in multiples of three.21

While they share this common ancestry, the APG system organizes them as separate, monophyletic lineages. The classification of these groups has evolved significantly; for instance, historical systems like that of Arthur Cronquist grouped many of these taxa differently, but modern molecular techniques—specifically DNA sequencing—have refined our understanding of their relationships and led to the current circumscription of these orders.13