taxonID	type	description	language	source
41635A04FFE4FFA9AE992093FC41E3DD.taxon	materials_examined	Type: — PHILIPPINES. Palawan, Barangay Cabayugan: Mount St Paul, on limestone cliffs, 200 m a. s. l., 23 June 2023, Collantes & Langbao 1 (holotype PNH 259144 [one sheet, barcode 01 - 001582]; isotypes PNH 259145 [three sheets, barcodes 01 - 001583 (sheet 1 of 6), 01 - 001584 (sheet 2 of 6), 01 - 001585 (sheet 3 of 6)]; MEL 2541012 A [sheet 4 of 6], MEL 2541013 A [sheet 5 of 6], MEL 2541014 A [spirit collection from sheet 5 of 6], MEL 2541015 A [sheet 6 of 6]).	en	Altomonte, John Charles A., Collantes, John Paul R., Mangussad, Vernaluz, Bustamante, Rene Alfred Anton, Robinson, Alastair S. (2025): Nepenthes megastoma (Nepenthaceae), a micro-endemic pitcher plant from Puerto Princesa Subterranean River National Park, Palawan, Philippines. Phytotaxa 728 (2): 93-107, DOI: 10.11646/phytotaxa.728.2.1, URL: https://doi.org/10.11646/phytotaxa.728.2.1
41635A04FFE4FFA9AE992093FC41E3DD.taxon	diagnosis	Diagnosis: — Nepenthes megastoma superficially resembles N. campanulata but differs in the production of (differences in parentheses): large growths, individual stems to 2.8 m long and 1.2 cm in dia., branching basally or medially to form pendent clumps to 10 m long (to ~ 35 cm, mostly basally branching to form short clumps, stems to 0.4 cm dia.), phyllodes elliptic-subobovate and 20 – 38 cm long with shortly decurrent base and slight abaxial basal swelling (spathulate-lanceolate, to 9 cm long, base amplexicaul without swelling), pitchers trimorphic, comprising uniform lower pitchers and two forms of upper pitcher (pitchers monomorphic), pitchers brittle, peristome pronounced, to 5.5 mm wide, lid ± suborbicular, to 5 cm dia. (pitchers flexible, peristome very narrow, typically ≤ 2 mm, lid ovate-elliptic, to 2 cm long), inflorescences to 48 cm long, partial peduncles dense, mostly 2 - flowered, female flowers ascending, unidirectionally upturned (Fig. 6 f) but borne on pedicels evenly distributed about rachis (inflorescences ≤ 20 cm long, lax with few flowers, partial peduncles mostly 1 - flowered, female flowers spreading, not unidirectionally upturned), and an indumentum of dimorphic trichomes present on most surfaces (almost entirely glabrous except below peristome and around spur).	en	Altomonte, John Charles A., Collantes, John Paul R., Mangussad, Vernaluz, Bustamante, Rene Alfred Anton, Robinson, Alastair S. (2025): Nepenthes megastoma (Nepenthaceae), a micro-endemic pitcher plant from Puerto Princesa Subterranean River National Park, Palawan, Philippines. Phytotaxa 728 (2): 93-107, DOI: 10.11646/phytotaxa.728.2.1, URL: https://doi.org/10.11646/phytotaxa.728.2.1
41635A04FFE4FFA9AE992093FC41E3DD.taxon	description	Description: — Lithophytic shrub. Stems 30 – 70 (– 280) cm long, terete, 0.8 – 1.2 cm in dia., internodes 1.1 – 2.1 cm, prolifically branched basally and medially with 1 – 30 (– 70) growing points, individual clumps to 10 m in length, pendent but with terminal portion of growths horizontal to suberect. Phyllodes coriaceous, marcescent, petiolate, petiole winged, margins often wavy, 4 – 7 cm long, c. 1 cm wide, base clasping stem for 1 / 2 its circumference and shortly decurrent for c. 0.5 cm, often slightly swollen abaxially. Lamina narrowly elliptic-subobovate, 20 – 30 (– 38) cm long, 7 – 10 cm wide, midrib 2.5 – 4.0 mm wide, (3 –) 4 longitudinal veins either side of midrib in outer 2 / 3 of lamina, transverse veins 15 – 25 pairs per phyllode, both fairly conspicuous on both adaxial and abaxial surfaces, base attenuate, apex of basal phyllodes broadly acute to narrowly obtuse and sometimes retuse, tendril exsertion not or only very slightly peltate, and in rosette phyllodes associated with upper pitchers becoming rounded, or obtuse and slightly retuse, tendril exsertion markedly peltate and emergent 0.7 – 1.5 cm from apex, tendrils 7 – 11 cm long, 3 – 4 mm dia., adaxially flattened, straight in basal pitchers, in rosette pitchers sinuous, forming a spring-like half-coil, rarely a full, single coil. Lower pitchers basally narrowly infundibular, rarely subventricose, with a median hip, then cylindric to widely infundibular above, ventrally attached to tendril, 4.5 – 9.3 cm tall excluding lid, 3.0 – 4.8 cm wide at the pitcher opening, opening round to rhomboid, pitcher walls 0.7 – 1.0 mm thick, interior surface glandular below hip, gland density c. 700 cm – 2, waxy above, exterior ventral surface with a pair of fringed wings 2 – 4 mm wide running from base of pitcher to mouth, fringe elements 1 – 5 mm long, 2 – 3 mm apart, peristome oblique throughout, c. 35 ° from horizontal, 3.0 – 5.5 mm wide, more or less uniform in width but often slightly narrower and slightly depressed at front between the wings, opposing margins below lid not appressed, with a gap of 1 – 4 mm, and often broader but lacking a rear column of any kind, ribs fine, c. 0.4 mm apart, c. 0.3 mm tall, teeth of inner margin minute, acute, generally ± 0.3 mm long. Lid suborbicular to very broadly ovate, 3.1 – 4.4 cm long, 3.8 – 5.0 cm wide, typically 20 – 50 ° from horizontal, slightly domed overall but furrowed along the midline with slight concave bulge at apex, apex retuse, occasionally deeply notched, base cordate, lower surface without pronounced median rib, with large, crateriform glands sparsely scattered across surface, absent from midline, more dense towards base, edges, and on apical bulge, glands 0.2 – 0.5 mm dia. with a broad, flat rim. Spur 1 – 4 mm long, often flattened, 1 – 3 mm wide, (1 – 2) – 3 - fid, branching basally or distally. Upper pitchers dorsally attached to tendril, base tubulose into tendril for 2 – 4 cm, expanding into pitcher to become basally narrowly infundibular below, with a median hip, and then either wholly infundibular-campanulate and mediolaterally flaring or shortly cylindric and infundibular above, apparently depending on season (see “ Discussion ”), 7.7 – 14.2 cm tall excluding lid, 3.1 – 5.6 cm wide at the pitcher mouth, pitcher opening round to somewhat rhomboid, peristome 1.5 – 7.0 mm wide, lid 3.2 – 4.8 cm long, 2.9 – 4.5 cm wide. Inflorescences marcescent, ± 1 per growing point per flowering season. Male inflorescence 31.5 – 43.5 cm long, 80 – 250 flowers, peduncle 7 – 15 cm long, 5 – 7 mm diam. at base, rachis 17 – 30 cm long, partial peduncles (1 –) 2 - flowered, 6 – 8 mm long, bifurcating 1 – 2 mm from base, each with simple, terete, abaxial filiform bract 4 – 5 mm long, 0.3 mm dia., emergent from base or slightly above, tepals very broadly ovate to suborbicular, 3 – 4 mm long, to 3 mm wide, concave, adaxial surface with 40 – 60 elliptic pitted glands, largest in middle, to 0.15 – 0.25 mm long, c. 0.1 mm wide, apex obtuse; staminal column 1.6 – 2.5 mm long, anther head 1.2 – 1.5 mm dia., anthers (6 –) 7 (– 10), bilocular, extrorse, thecae pale yellow, pollen grains deep yellow. Female inflorescence 30 – 48 cm long, (40 –) 80 – 150 (– 200) flowers, peduncle 10 – 16 cm long, 6 – 7 mm diam. at base, rachis 16 – 25 cm long, partial peduncles evenly distributed about rachis, but either erect or ascending so that all female flowers are similarly orientated upwards, 2 - flowered, 7 – 14 mm long, bifurcating 2 – 3 mm from base, basal filiform bract 2 (– 4) mm long, simple, free or partially adnate to partial peduncle, tepals ovate, 4 – 6 mm long, 3 mm wide, apex subacute, fruit 13 – 20 mm long, 4 – 5 mm dia., valves 4. Seeds fusiform, 4 – 6 mm long, wings somewhat reduced. Indumentum of dimorphic, eglandular, compound trichomes present on most surfaces, comprising a mix of sessile, basally branched stellate, multiangulate trichomes, each with (6 –) 7 (– 8) rays 0.05 – 0.12 mm long, and peltate scales (lepides) with angular processes c. 0.7 mm dia., but most dense on stems, inflorescences, partial peduncles, abaxial tepal surfaces and external surfaces of pitchers, trichomes largely absent from adaxial phyllode surface where mainly peltate scales are only sparingly scattered towards base, abaxial phyllode surface with densely arranged trichomes comprising predominantly scales, stellate hairs becoming simpler, longer and ± erect along curved margins of decurrent phyllode bases, underside of lid with peltate scales only, and trichomes reduced to simple hairs 0.1 – 0.2 mm long on valves of fruit. Colour of all plant parts initially bright chartreuse green, adaxial lamina surface of senescing phyllodes becoming forest green with age, pitchers becoming yellowish green, lower pitchers splotched or suffused with red, mainly along tendril, towards pitcher opening, and either side of midrib of lid, upper pitchers without any red colouration but parts of the pitchers orientated parallel to the line of sight appearing orange-tinged due to density of indumentum, pitcher interior yellow in the lower, digestive portion, whitish above owing to covering of epicuticular wax.	en	Altomonte, John Charles A., Collantes, John Paul R., Mangussad, Vernaluz, Bustamante, Rene Alfred Anton, Robinson, Alastair S. (2025): Nepenthes megastoma (Nepenthaceae), a micro-endemic pitcher plant from Puerto Princesa Subterranean River National Park, Palawan, Philippines. Phytotaxa 728 (2): 93-107, DOI: 10.11646/phytotaxa.728.2.1, URL: https://doi.org/10.11646/phytotaxa.728.2.1
41635A04FFE4FFA9AE992093FC41E3DD.taxon	etymology	Etymology: — The epithet megastoma is constructed from the Greek-derived prefix mega - (large) and the Greek word stoma (mouth), meaning ‘ large mouth’, a reference to the diameter of the pitcher opening, which is greater than that of the rest of the pitcher in all pitcher forms.	en	Altomonte, John Charles A., Collantes, John Paul R., Mangussad, Vernaluz, Bustamante, Rene Alfred Anton, Robinson, Alastair S. (2025): Nepenthes megastoma (Nepenthaceae), a micro-endemic pitcher plant from Puerto Princesa Subterranean River National Park, Palawan, Philippines. Phytotaxa 728 (2): 93-107, DOI: 10.11646/phytotaxa.728.2.1, URL: https://doi.org/10.11646/phytotaxa.728.2.1
41635A04FFE4FFA9AE992093FC41E3DD.taxon	biology_ecology	Phenology: — Infructescences observed nearing maturity at end May, suggesting maturity in mid-June, two months after end of dry season. At this time, 80 % of all males were observed to have already senesced.	en	Altomonte, John Charles A., Collantes, John Paul R., Mangussad, Vernaluz, Bustamante, Rene Alfred Anton, Robinson, Alastair S. (2025): Nepenthes megastoma (Nepenthaceae), a micro-endemic pitcher plant from Puerto Princesa Subterranean River National Park, Palawan, Philippines. Phytotaxa 728 (2): 93-107, DOI: 10.11646/phytotaxa.728.2.1, URL: https://doi.org/10.11646/phytotaxa.728.2.1
41635A04FFE4FFA9AE992093FC41E3DD.taxon	distribution	Distribution and ecology: — Nepenthes megastoma is known from only three locations, growing on cliff walls within PPSRNP (R. Moyano, pers. comm.); only two locations were accessible to us. Even at these locations, plants are difficult to access, being situated tens to hundreds of metres above ground level. At Location 1, all observed individuals occurred in a band at approximately 250 m elevation and could only be studied by drone. These plants grew on exposed cliffs with a full southwesterly aspect, receiving intense afternoon insolation. In contrast, at Location 2, plants were found at 91 – 115 m a. s. l., growing on the walls of sheltered, overhanging cliffs with a northwesterly aspect, subject to only diffuse evening light later in the day. At both locations, the rock underlying the Nepenthes was dark and encrusted with humic material, likely indicative of long periods of time in association with the plants and the communities that form amongst their tangled stems. Tracts of this dark rock were observed fully exposed in places where plants were found to have fallen from the walls (see “ Conservation status ”). Co-occurring flora in the general vicinity of Nepenthes megastoma includes Amorphophallus palawanensis (Araceae Juss.), Begonia taraw (Begoniaceae C. Agardh), Cycas saxatilis (Cycadaceae Pers.), Dracaena sp. (Asparagaceae Juss.), Gynura sp. (Asteraceae Bertch. & J. Presl), Paphiopedilum philippinensis (Orchidaceae Juss.) and Ridsdalea philippinensis (Rubiaceae Juss.). Numerous small (c. 5 mm) ants were observed feeding at large crateriform glands beneath the lids of many pitchers. Larvae tentatively identified as blow flies (Calliphoridae) and a Dasyhelea sp. (Ceratopogonidae) (Charles Clarke pers. comms.) were observed in the basal cavity of several dissected pitchers (Figs. 7 a, b) and, in the case of the former, were seen to be actively engaged in macerating and swallowing fragments of large (c. 1 cm) ants (Camponotus sp.). Solitary black wasps (Pompilidae) with iridescent blue wings were also observed resting on the phyllodes or pitcher peristomes of several plants, though specific interactions with the plants or their pitcher communities could not be deduced.	en	Altomonte, John Charles A., Collantes, John Paul R., Mangussad, Vernaluz, Bustamante, Rene Alfred Anton, Robinson, Alastair S. (2025): Nepenthes megastoma (Nepenthaceae), a micro-endemic pitcher plant from Puerto Princesa Subterranean River National Park, Palawan, Philippines. Phytotaxa 728 (2): 93-107, DOI: 10.11646/phytotaxa.728.2.1, URL: https://doi.org/10.11646/phytotaxa.728.2.1
41635A04FFE4FFA9AE992093FC41E3DD.taxon	conservation	Conservation status: — Observations of Nepenthes megastoma, together with discussions with local rangers, suggest the species has a naturally small range and population. At Location 1, only four distinct individuals could be identified in our drone footage. Notably, the image of this species published in Clarke et al. (2014: fig. 6), taken in July 2013, shows the same rock formations — and thus the same population — with six to seven individuals visible, indicating a decline in numbers in this subpopulation since that time. At Location 2, there were 15 large and presumably clonal individual clumps recorded, along with a small number of scattered, smaller plants, resulting in an estimated total subpopulation size of fewer than 25 individuals. Three large, fallen piles of mature Nepenthes vines were found at the base of the cliffs in an advanced state of decomposition, with corresponding growth scars of dark rock visible on the rock face directly above (Fig. 7 c – e), and were identified by our guides as remains of direct damage caused by Typhoon Rai. The third location, which could not be visited owing to the perilous limestone terrain, is home to just two or three plants (R. Moyano, pers. comm.). Our observations have identified a Nepenthes megastoma functional population size (IUCN 2012) of approximately 19 known mature clumps, believed to represent highly branched single plants, and approximately 12 non-flowering (putative juvenile) plants. Given the complex nature of this karst formation — a limestone ridge 11 km long, 3 – 5 km wide on average, with an area of 35 km- 2, comprising steep-sided towers, cones, and pinnacles, interspersed with cockpits and dolines (Piccini & Landelli 2011) — the presence of additional N. megastoma subpopulations cannot be ruled out. The interior of the range that can be accessed without specialist climbing equipment has been relatively wellexplored by park rangers and official guides, who have indicated that there are currently no other casual records of this distinctive plant elsewhere in the park, though the plant has not previously been the subject of a targeted search. Based on current knowledge, Nepenthes megastoma satisfies the IUCN 3.1 Red List CR (Critically Endangered) criteria B 1 ab (ii, v) + B 2 ab (ii, v) + C 2 a (i) (IUCN 2012), i. e., it has an extent of occurrence (EOO) <100 km 2 and is known to exist at only a single location (comprising three subpopulations), with projected declines in the number of mature individuals owing to increasing frequency and severity of extreme weather events, particularly droughts and typhoons, as well as poaching, which has already been documented through several sales of illegally harvested plants via a vendor in Manila; has a known area of occupancy (AOO) <10 km 2 at a single location, again with the same projected decline in number of mature individuals; and a population size estimated at well below the threshold of 250 mature individuals, with no subpopulation estimated to contain more than 50 mature individuals. The small AOO is a particular concern since it makes the taxon particularly vulnerable to destructive stochastic events like fire. The clearing of forest for agriculture and development adjacent to the boundaries of the PPSRNP represent a risk that cannot be fully assessed here. Such land conversion may affect the natural, historic patterns of orographic lift across the limestone massif, affecting rates and patterns of precipitation and thence the hydrological stability of the limited cliffside habitats that have fostered the evolution of this microendemic species. While criterion D (population size estimated to number fewer than 50 mature individuals) may well be satisfied by the cumulative total of 19 mature individuals, this is not assessed as such here owing to the uncertainties resulting from insufficient exploration of the karst formation specifically targeting this taxon.	en	Altomonte, John Charles A., Collantes, John Paul R., Mangussad, Vernaluz, Bustamante, Rene Alfred Anton, Robinson, Alastair S. (2025): Nepenthes megastoma (Nepenthaceae), a micro-endemic pitcher plant from Puerto Princesa Subterranean River National Park, Palawan, Philippines. Phytotaxa 728 (2): 93-107, DOI: 10.11646/phytotaxa.728.2.1, URL: https://doi.org/10.11646/phytotaxa.728.2.1
41635A04FFE4FFA9AE992093FC41E3DD.taxon	materials_examined	Specimens examined: — Nepenthes megastoma: PHILIPPINES. Palawan: Barangay Cabayugan: Mount St Paul, on limestone cliffs, 200 m a. s. l., 23 June 2023, Collantes & Langbao 1, detail of type materials referenced in protologue (holotype PNH 259144! [stem fragment bearing 8 phyllodes with one intact upper pitcher and a female infl. with dehiscent capsules]; isotypes PNH 259145! [3 detached phyllodes, bearing a lower pitcher, upper pitcher, and partially developed pitcher respectively, and a detached male infl. at anthesis (sheet 1 of 6); 1 detached phyllode bearing upper pitcher (sheet 2 of 6); 2 detached phyllodes bearing upper pitchers, one sectioned to reveal interior (sheet 3 of 6)]; MEL 2541012 A! [stem fragment bearing 6 phyllodes with 3 whole or partial lower pitchers, and a detached phyllode with a lower pitcher (sheet 4 of 6)], MEL 2541013 A! [stem fragment bearing 3 phyllodes and a female infl. with dehiscent capsules (sheet 5 of 6)], MEL 2541014 A! [spirit collection containing intact upper pitcher, one detached lid, and several dehiscent valves with few seeds], MEL 2541015 A! [stem fragment bearing 8 phyllodes with one partially developed pitcher and a male infl. at anthesis (sheet 6 of 6)]).	en	Altomonte, John Charles A., Collantes, John Paul R., Mangussad, Vernaluz, Bustamante, Rene Alfred Anton, Robinson, Alastair S. (2025): Nepenthes megastoma (Nepenthaceae), a micro-endemic pitcher plant from Puerto Princesa Subterranean River National Park, Palawan, Philippines. Phytotaxa 728 (2): 93-107, DOI: 10.11646/phytotaxa.728.2.1, URL: https://doi.org/10.11646/phytotaxa.728.2.1
41635A04FFEEFFA8AEF923BAFDC6E593.taxon	materials_examined	INDONESIA. Borneo, E. Kalimantan, Berau: foot of Mt Ilas Bungaan on steep limestone walls, upriver from Sangkulirang, 300 m, 9 Sept. 1957, Kostermans 13764 (holo photo SING!; iso A n. v.; photo BM!; photo BO!; CANB n. v.; K!; photo KEP!; L!; photos NY! [2 sheets]; photos P! [2 sheets]; photo US!) [single stem with two branches bearing ca. nineteen pitchers / pitcher fragments (SING 0046768); branched, sterile stem bearing ca. twenty pitchers and six pitcher fragments in an envelope (BM 000522420); length of stem with one attached and one detached rosettes of leaves bearing pitchers (BO 1300380); short, sterile stem bearing ca. eight pitchers and two leaf and pitcher fragments (K 000651541); two stems, left bearing one large pitcher and a number of juvenile sized pitchers, right with few small basal pitchers (KEP 13190); two stems, top with numerous intact leaves and pitchers, bottom with leaves and fragmented pitchers (L 0281510); at least three overlayed stems bearing numerous pitchers, three dehiscent infructescences apparent (NY 00039331 photo); single rosette bearing ca. ten pitchers (NY 00039332); two stems, left depauperate, right with ca. nine pitchers (P 00686448); one? branched stem bearing massed large leaves and pitchers, ca. five infructescences apparent (P 00686449); three? sterile stems bearing numerous pitchers (US 00516982)].	en	Altomonte, John Charles A., Collantes, John Paul R., Mangussad, Vernaluz, Bustamante, Rene Alfred Anton, Robinson, Alastair S. (2025): Nepenthes megastoma (Nepenthaceae), a micro-endemic pitcher plant from Puerto Princesa Subterranean River National Park, Palawan, Philippines. Phytotaxa 728 (2): 93-107, DOI: 10.11646/phytotaxa.728.2.1, URL: https://doi.org/10.11646/phytotaxa.728.2.1
41635A04FFECFFABAEAC249AFDBFE17A.taxon	materials_examined	PHILIPPINES. Palawan: Mt. Pulgar [Thumb Peak], Curran 3896 (lectotype K n. v.); waterfall 2 km west of Sabang, Barangay Cabayugan, M. Mendum, D. J. Middleton & R. Fuentes 25545 (holotype K!; iso photos E! [2 sheets]; PNH n. v.) [stem with six phyllodes, one upper pitcher and male inflorescence (K 382198); stem with six phyllodes and two lower pitchers, with sketch of lid nectar gland (E 281569); two stems, one bearing a single phyllode, other with six phyllodes and two lower pitchers (E 281570)]; above waterfall 2 km west of Sabang, Barangay Cabayugan, M. Mendum, D. J. Middleton & R. Fuentes 25551 (paratype K!; photo E!) [rosette with nine phyllodes and four lower pitchers (K 382199); rosette with seven small lower pitchers (E 281568)]; Between Culion and the “ Negative Barrio, ” Culion Island, Calamian Group, H. H. Bartlett 15544 26 July 1935 (photo GH!; NY 1628539 n. v.) [rosette with numerous phyllodes and pitchers, as well as male inflorescence, originally as ‘ Nepenthes ventricosa Blanco’, annotated ‘ N. sp. not N. ventricosa Blanco Cheek 1994 ’ (GH 01871616)]; Brookes Point, Caramay, forest road to Bulho, about 8 km off Abo-Abo to Brookes Point main road, at Malalung River bridge, rocky river bank in partially logged lowland mixed forest, D. D. Soejarto 6546 with E. Reynoso, E. Sagcal, & R. Edrada 12 April 1989 (NY 1628545 n. v.); Puerto Princesa, exposed ridge between Mt. Viadunga and Mt. Beaufort, chromite mining site, D. D. Soejarto 6431 with E. Reynoso, E. Sagcal, & R. Rutz 06 April 1989 (NY 1628546 n. v.); Silanga, E. D. Merrill 9588 May 1913 (photos BK!; NY!; US!) [stem with upper pitchers and simultaneous pair of fragmented infructescences, originally labelled ‘ Nepenthes brachycarpa ’ but identified as ‘ isotype of Nepenthes brachycarpa Merrill = N. philippinensis Macfarl. ’ by Cheek, 23. iii. 2000 (BK 235337); stem with numerous phyllodes, single, folded upper pitcher and detached infructescence (NY 00387787); stem one immature and one mature infructescences (US 100638)]; Puerto Princesa, Bacuñgan [Bacungan] ‘ along river in forest’, originally as ‘ Nepenthes alata Blanco’, G. E. Edaño 259 March 26 1947 [stem with large upper pitcher pair and immature infructescence (A 01871597)]; Puerto Princesa, Bacuñgan [Bacungan] ‘ above river in secondary growth’, originally as ‘ aff. hirsuta Hk f. [Hooker f.] of Borneo’, G. E. Edaño 325 March 23 1947 [pair of rosettes bearing numerous, small lower pitchers and intact roots (A 01871596)]; Victoria Mountains [Victoria-Anepahan Mountain Range], Panacan, Aborlan, ‘ Mt. Victoria (SE slope) Panacan, upper source of Karaniagan River, open bank where boulders abound’, 350 m asl, M. D. Sulit 12441 May 17 1950 [stem with three upper pitchers and male inflorescence (A 01871614)]; Mt. Mantalingajan, submontane ridge, ultrabasic soil, 1100 m, G. Argent & E. M. Romero 92150 4 March 1992 [stem with two phyllodes bearing a mature upper pitcher and a partially formed upper pitcher (E 32648)]. Note that H. H. Bartlett 15544 shares some features in common with Nepenthes abalata Jebb & Cheek (2012: 3), apparently flowering in the rosette stage, however, the specimen is notably lacking nectar glands along the midline of the lower surface of the lid and is at least partly 2 - flowered. Moreover, N. philippinensis has on several occasions been noted to flower in the rosette stage along the boulder-strewn lowland floodplain of Mt Victoria’s Buhawi River, along the principal route of access to the peak of that mountain (A. Robinson pers. observ.).	en	Altomonte, John Charles A., Collantes, John Paul R., Mangussad, Vernaluz, Bustamante, Rene Alfred Anton, Robinson, Alastair S. (2025): Nepenthes megastoma (Nepenthaceae), a micro-endemic pitcher plant from Puerto Princesa Subterranean River National Park, Palawan, Philippines. Phytotaxa 728 (2): 93-107, DOI: 10.11646/phytotaxa.728.2.1, URL: https://doi.org/10.11646/phytotaxa.728.2.1
