Related Species
Upper pitchers of N. fusca, showing the narrowly triangular lid of this species and its distinctive peristome morphologyThe lower pitchers of N. hurrelliana are distinctive, but the upper ones bear a close resemblance to those of N. fusca. Of the Bornean pitcher plant flora, only these two species have such a narrowly triangular lid. The upper pitchers of N. hurrelliana differ in having a horizontal mouth that rises abruptly into a long neck at the back and in having a hirsute basal crest on the underside of the lid.
Nepenthes hurrelliana is particularly similar to a form of N. fusca from the southern portion of the Crocker Range in Sabah. This form exhibits a wider peristome, longer neck, and a more triangular lid than most other examples of the species. However, the peristome is still not as well developed as in N. hurrelliana and the plant lacks the dense indumentum of the latter. Furthermore, N. hurrelliana differs in the distribution of nectar glands on the lower surface of its lid.
Nepenthes hurrelliana may also be confused with its other putative parent species, N. veitchii. The two taxa differ markedly in growth habit and N. hurrelliana has more infundibular pitchers with distinctive purple speckles as well as a differently shaped lid.
The species has also been compared to N. maxima, although the latter is now known to be absent from Borneo.
In his Carnivorous Plant Database, taxonomist Jan Schlauer lists N. hurrelliana as a possible hybrid between N. veitchii and N. stenophylla (as distinct from N. fallax).
Read more about this topic: Nepenthes Hurrelliana
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