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 . 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 .