The new species of triggerplant (Stylidiaceae) described here is endemic to the Northern Territory. It belongs in Stylidium subgenus Andersonia (R. Br.) Mildbr., which is characterized by having a linear hypanthium, the walls of the mature capsule recurved, the septum erect and persistent, and numerous seeds. This subgenus occurs in regions of tropical northern Australia and extends into south-east Asia (Mildbraed 1908).