Terrestrial shrub or climber 0.3-4 m tall. Leaves thinly coriaceous, petiolate, those of climbing stems with leaf blade broadly to narrowly elliptic; Fruit with valves 14-28 by 2.5-4 mm. Seeds fusiform, 11.5 by 0.5 mm.
Asia-Tropical:, Maluku (Maluku ‒ present); New Guinea ‒ present Halmahera: present Waigeo Island: present
New Guinea (Waigeo Island) and Moluccas (Halmahera).
3. The species was named in honour of Benedictus Danser (1891-1943), whose taxonomic studies of this genus are without parallel. 1 Nepenthes danseri is slender, with a yellowish coloration overall. Other unusual features of this species are the very small blades of the rosette leaves, and the ability of the plants to grow in shade, though they apparently fail to produce pitchers there. 2. Nepenthes tomoriana from Sulawesi is the only paniculate species with which N. danseri is likely to be confused. Nepenthes danseri is distinguished from it by the lack of a bract on the partial peduncles, and the fewer, larger glands on the lid. The rosette and lower pitchers of N. tomoriana are ellipsoid and much more inflated, 3.5-4 cm wide (not 1.8-2.5 cm), the fringe elements 5-10 mm long (not 0.5-1.5 mm) and grouped in clusters (not evenly spaced); the peristome is 4 mm deep on the inner face (not to 2 mm) with teeth to 7 mm long (not 0.5 mm) and has prominent, ridge-like (not barely perceptible) ribs.