Linked from
The 58 pages that link to Monocotyledon, each with the reason it gives.
CotyledonCompared with: Monocots contrast with dicots in having a single embryonic seed leaf.
EudicotsCompared with: Their usual single seed leaf contrasts with the two typical of eudicots.
CaryophyllalesCompared with: Caryophyllales belongs to the eudicots, unlike the monocot lineage.
AmborellaCompared with: Monocots are a major branch that diverged after Amborella’s lineage.
DicotyledonCompared with: Monocots contrast with the traditional two-cotyledon grouping.