Original: In plant taxonomy, the name commelinids (plural, not capitalized) is used by the APG II system for a clade within the monocots, which in its turn is a clade within the angiosperms.
Simplified: The name commelinids is a plant taxonomy (plural, not capitalized) is used by the APG II system for a clade within the monocots, which in its turn is a clade within the angiosperms.