The pitcher lid is elliptic to oblong and has no appendages.
The pitcher lid or operculum is cordate and up to 5 cm wide.
The two sharp spines for which the species is famous are present on the underside of the pitcher lid, and may be 3 cm long.
The pitcher lid is often yellow or green on the underside and dark purple on its upper surface.
The pitcher lid is orbicular-ovate and up to 7.5 cm long.
The pitcher lid or operculum is ovate and up to 8 cm wide.
The pitcher lid or operculum is broadly to narrowly ovate.
The pitcher lid or operculum is approximately orbiculate in shape.
The pitcher lid or operculum is sub-orbiculate and has no appendages.
The pitcher lid is of the same width as the mouth.
