 "Nepenthes attenboroughii" is a terrestrial upright or scrambling shrub.The stem, which may be up to 3.5 cm thick, is circular in cross section and attains a height of up to 1.5 m.

The leaves are coriaceous and sessile or sub-petiolate.The leaves of rosettes are up to 30 cm long and 10 cm wide, whereas those of the scrambling stem are up to 40 cm long and 15 cm wide.