is a vast area of tropical uplands covering nearly 30,000 km2, which surrounds many of the tepuis of the eastern range. It gradually rises in elevation from 750 m in the south to 1450 m in the north. The rocky uplands of Sierra de Lema and Sierra Senkopirén lie to the north and northwest of the Gran Sabana and surround the Auyán Massif. They have an elevational range of around 700 to 1650 m. Cerro Venamo is a sandstone mountain near the border between Venezuela and Guyana, at the northeastern tip of the Gran Sabana. With a height of 1600 m it falls somewhere between an upland and a true highland area. As with many other localities in the Guayana Highlands, the name Cerro Venamo has been inconsistently applied to a number of adjacent areas. Heliamphora ciliata is endemic to these upland areas and H. heterodoxa may also be (though see Ptari Tepui). Notes a.The altitudinal distribution of H. ceracea is not specified in Sarraceniaceae of South America, either in the species profile or the formal description, but the holotype was collected at an elevation of 1900 m. b.For 39 years, based on an uncontested measurement performed in 1965 by topographer José Ambrósio de Miranda Pombo, using a theodolite, the elevation of Pico da Neblina was thought to be , but a much more accurate measurement performed in 2004 with state-of-the-art GPS equipment by cartographer Marco Aurélio de Almeida Lima, a member of a Brazilian army expedition, puts it at . This is now recognised by the Brazilian Institute of Geography and Statistics (IBGE), the federal government's official geographic survey and census agency, which jointly organised the expedition. The height of Pico 31 de Março / Pico Phelps was similarly reduced from to . c.There is some discrepancy between published sources with respect to the distribution of H. minor var. pilosa: the formal description of Fleischmann & Grande Allende (2012) states that this variety is endemic to the northern portion of the summit plateau of Auyán Tepui, while in Sarraceniaceae of South America (co-authored by Fleischmann) its range is said to encompass both Auyán Tepui and Cerro La Luna, with photographs from both localities included. d.The maps provided in Sarraceniaceae of South America place Maringma Tepui on the Brazil–Venezuela border some distance southeast of Mount Roraima, but other published sources place it just inside Guyana near the border with Brazil, around 17 km east of Mount Roraima (). In Sarraceniaceae of South America it is stated that Maringma Tepui was previously incorrectly called "Mount Yakontipu" by Fleischmann et al. (2007) in their description of Drosera solaris. e.Otto Huber summarised this muddled toponymy as follows: "There is, however, confusion concerning the precise names of the two central mountains; according to Brewer-Carías (1978), Murochiopán-tepui is the name of a smaller lateral mountain of Aparamán [], followed to the east by the high Tereke Yurén-tepui and the lower Tucuy-wo-cuyén-tepui, whereas members of the Terramar Foundation expeditions (Steyermark 1986a; Holst 1987; George 1988) apply the name Murisipán-tepui to Brewer's Tereke Yurén-tepui, and the name Tereke-yurén-tepui to Brewer's Tucuy-wo-cuyén-tepui, omitting the name of the smaller lateral mountain of Aparamán-tepui." A yet different sequence (and spelling) of names can be found in, for example, the formal description of H. folliculata, namely: Murosipan, Aparaman, Tereke-Yuren, and Kamarkaiwaran. f.The locality commonly known today as Cerro Venamo (), which forms part of the international boundary between Guyana and Venezuela, does not correspond to the mountain originally given this name by Julian Alfred Steyermark. The latter is known to host Heliamphora while the former is not. g.This assumes that the