Description
Nepenthes hurrelliana is a climbing plant. Forms from different localities vary slightly in morphology. Plants from Mount Mulu and several other mountains have internodes up to 10 cm long.
The leaves of the type form from Mount Lumarku are up to 24 cm long and have a winged petiole, which clasps the stem for about half of its circumference and is decurrent for around 1 cm. Plants from Mount Mulu produce more narrowly lanceolate leaves with broadly winged petioles that are decurrent down the entire internode (≤10 cm long).
Rosette and lower pitchers are narrowly ovate to infundibular. They are large, growing to 30 cm in height. The lid or operculum is broadly triangular in shape and has an undulating margin. The peristome forms an extended neck (≤9 cm long) at the rear and is up to 7 cm wide at this point.
Upper pitchers are more infundibular than their lower counterparts, but also reach large dimensions of up to 28.5 cm. In aerial pitchers, the lid is much more narrowly triangular. It measures up to 8 cm long by 4.2 cm wide and has a cordate base. It bears a hook-shaped basal crest and a filiform apical appendage up to 5 mm long. A number of large, scattered nectar glands are present on the underside of the lid, particularly along the margins and near the base.
Nepenthes hurrelliana has a racemose inflorescence. Pedicels bear a basal bract measuring 3 to 4 mm in length.
The dense reddish-brown indumentum of N. hurrelliana is one of the most conspicuous of any Nepenthes species. The upper surface of the lid has rusty-brown hairs, while the lower surface only bears them along its margins. Unusually for Nepenthes, hairs are present even on the upper surface of the lamina and on the glandular crest of the lid.
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