Most of the species in this clade are large plants with petiolate leaves, an indumentum of coarse reddish-brown hairs, raceme-like inflorescence, and funnel-shaped (infundibulate) upper pitchers. All bear a characteristic appendage on the lower surface of the lid near the apex. With the exception of "N. lowii", the "Regiae" all have a mostly flattened or expanded peristome. The majority of species comprising "Regiae" are endemic to Borneo. Based on current understanding of the genus, "Regiae" appears to reflect the relationships of its members quite well, although the same cannot be said for the other clades. Despite this, Danser's classification was undoubtedly a great improvement on previous attempts.