Nepenthes kerrii is a tropical pitcher plant native to Tarutao National Marine Park in southern Thailand,[2] where it grows at elevations of 400–500 m above sea level.

[3] The 2018 IUCN assessment also considers the taxon found on Langkawi Island of Malaysia (~10 km south of Tarutao) to be conspecific.

[2][4] The specific epithet kerrii refers to Irish medical doctor Arthur Francis George Kerr, who made the first known herbarium collection of this species.

This specimen, Kerr 14127, was collected at an elevation of around 500 m from what is now Tarutao National Marine Park, Satun Province, Thailand.

[2] Italian naturalist Marcello Catalano came across this plant material in 2006 and recognised it as a previously unknown taxon.

[4] The first published description of N. kerrii appeared in volume I of Stewart McPherson's 2009 monograph, Pitcher Plants of the Old World.

However, he lacked all the necessary measurements and photographs to complete it and so, in 2009, he once again attempted to reach the wild plants in Tarutao, but this time the expedition was thwarted by torrential rains.

Contrary to McPherson's interpretation, Catalano and Kruetreepradit excluded the Langkawi taxon from their circumscription of N. kerrii and identified N. kongkandana as its closest relative.

[7] Nepenthes kerrii is a climbing plant growing to a height of approximately 4 m. The stem is terete and 3–5 mm in diameter.

A pair of wings (≤8 mm wide) runs down the ventral surface of the pitcher cup, bearing narrow fringe elements.

The pitcher lid or operculum is round with a slightly cordate base and an irregularly wavy margin.

The lower surface of the lid does not have any appendages, but bears numerous crater-like glands (≤1 mm in diameter), the largest of which are located around the midline.

Aerial pitchers have a lighter pigmentation than their lower counterparts, being green to yellow on the outer surface.

The female inflorescence is similar in structure to the male one, but differs in having a rachis up to 25 cm long with longer pedicels of 10–23 mm.

[3] This is thought to be an adaptation to the species's island habitat; the lack of prominent seed wings likely serves to prevent strong winds from blowing them into the sea.

[4] Nepenthes kerrii is native to Tarutao National Marine Park in Satun Province, southern Thailand.

[4] In Pitcher Plants of the Old World, Stewart McPherson writes that populations of N. kerrii "are extremely inaccessible and not threatened at present".

[2] Nepenthes kerrii can be distinguished from all of these species, with the exception of N. kongkandana, on the basis of its laminae, which are obovate as opposed to linear to lanceolate.

[2] In their description of N. kerrii, Catalano and Kruetreepradit also note a number of other vegetative features that separate this species from N. kongkandana.