larger pitchers than these species. The shape of the pitcher cup is closest to N. talangensis (minus the peristome), whereas the lid resembles that of N. tenuis, although it is broader throughout and contracted towards the base. N. jacquelineae can also be distinguished from N. tenuis by its ovate-spathulate leaf blade, as opposed to linear-lanceolate in the latter. The large glands on the underside of the lid are unique among Sumatran Nepenthes species, and help to distinguish N. jacquelineae from related taxa. N. jamban also possesses very large nectar glands (≤0.5 mm), but differs in having longer and one-flowered partial peduncles, and a narrower lid. Nepenthes flava can be easily distinguished from N. jacquelineae on the basis of its ovate or oblong lid and cylindrical peristome. The most characteristic feature of N. jacquelineae is its greatly expanded peristome, which can be up to 3.5 cm wide in upper pitchers. It is unusually smooth and only has significant ribs at the front where it is contracted. This is in stark contrast to the closely related N. inermis, which produces upper pitchers that lack a peristome completely. The only other species with a similarly expanded peristome is N. platychila from Borneo, although the two taxa are not otherwise related. Natural hybrids In the wild, N. jacquelineae often occurs sympatrically with N. izumiae. It is thus not surprising that it occasionally hybridises with this species. Pitchers of N. izumiae × N. jacquelineae are reddish in colour and are usually dominated by characteristics of N. jacquelineae. Specimens of a putative natural cross between N. dubia and N. jacquelineae have also been recorded. Notes a.The original Latin description of N. jacquelineae reads: Nepenthi inermi similis, sed habitu robustiore, peristomio lato expanso, operculo latiore glandes pergrandes nectariferas ferenti differt. Typus: Clarke, Davis & Tamin 1307 (holo, ANDA, hic designatus), Sumatra, Sumatra Barat, Bukit Barisan, north of Bukittinggi, 1700 m, 13 July 2000. References Hernawati & P. Akhriadi 2006. A Field Guide to the Nepenthes of Sumatra. PILI-NGO Movement, Bogor. External links Images of N. jacquelineae in its natural habitat Carnivorous plants of Asia jacquelineae Endemic flora of Sumatra Plants described in 2001