All of these Nepenthes produce very viscous pitcher fluid.

Unable to find the exit, they eventually fall into the pitcher fluid and drown.

Hauling food from the pitcher fluid to the peristome-a distance of no more than 5 cm-may take up to 12 hours.

These species are characterised by infundibular upper pitchers and highly viscous pitcher fluid.

The pitcher fluid of N. flava is highly viscous and coats the inner pitcher walls.

The ants feed by descending into the pitcher fluid and retrieving arthropods caught by the plant.

The pitcher fluid of N. jacquelineae is extremely viscous and coats the pitcher walls.

Indeed, this trapping method is employed by the closely related N. inermis, which also produces highly viscous pitcher fluid.

This species does not appear to possess the highly viscous pitcher fluid of species such as N. inermis.

A similar trapping method may be employed by related species such as N. dubia, which also produce very viscous pitcher fluid.