Pitcher Plants of the Old World
If the type locality is the site of the last remaining population of this species then it is one of rarest "Nepenthes" known and "threatened with imminent extinction". In "Pitcher Plants of the Old World", Stewart McPherson wrote that field studies are "urgently required" to properly assess its conservation status. In 2010, the Rare "Nepenthes" Collection was established with the aim of conserving "N. rigidifolia" and three other critically endangered "Nepenthes" species: "N. aristolochioides", "N. clipeata", and "N. khasiana".