page_title: Nepenthes mantalingajanensis
section_title: Description
hierarchical_section_title: Nepenthes mantalingajanensis / Description
caption_attribution_description: English: Nepenthes mantalingajanensis at its type locality on Mount Mantalingahan, en:Palawan (Alastair Robinson, July 2007) - a particularly globose lower pitcher.
context_page_description: Nepenthes mantalingajanensis is a tropical pitcher plant known only from the summit region of Mount Mantalingajan, the highest point on the Philippine island of Palawan, after which it is named.
context_section_description: Depending on environmental conditions, N. mantalingajanensis may grow as a compact rosette or produce an upright stem 30–60 cm tall. Internodes are circular in cross section and up to 1 cm in diameter. The species does not appear to produce a climbing stem.
  Leaves are petiolate to sub-petiolate and coriaceous in texture. The lamina (leaf blade) is broadly lanceolate in shape and can reach 20 cm in length by 6 cm in width. The apex of the lamina is typically acute or obtuse, but may be sub-peltate, with the point of tendril attachment being up to 4 mm from the apex. The lamina is attenuate at its base. The petiole itself is amplexicaul, canaliculate (grooved lengthwise), and up to 7 cm long. Tendrils are up to 30 cm long.
  Rosette and lower pitchers are usually ovate or obconic, although ones that develop embedded in substrate often have a more globose shape. Pitchers produced on older plants are generally more elongated with a narrower basal portion. Terrestrial pitchers are quite small, typically reaching only 15 cm in height by 6.5 cm in width, although particularly globose traps may be 12 cm wide. A pair of wings (≤8 mm wide), with fringe elements up to 5 mm long, usually runs down the ventral surface of the pitcher cup, although the wings may occasionally be reduced to ribs. The peristome is approximately cylindrical and up to 2 cm across. It bears ribs up to 2 mm high and spaced up to 3 mm apart, which terminate in curved teeth up to 5 mm long. The peristome is elongated into a neck at the rear, where the teeth on the two lobes of the peristome run apart to form distinctive gap. The pitcher lid or operculum is cordate (heart-shaped) and may have a rounded or pointed tip. It measures up to 5 cm in length by 4 cm in width and does not bear any appendages. The spur, which is inserted near the base of the lid, is up to 8 mm long and may be simple or branched.
  Observations of hundreds of plants across three habitat types found no evidence of climbing stems or upper pitchers in this species, suggesting that aerial traps are either very rare or absent altogether. It has been speculated that N. mantalingajanensis may produce upper pitchers only in deep shade or if provided with sufficient vegetation to support a climbing stem, as is the case with the closely related N. deaniana and N. mira.
  Nepenthes mantalingajanensis has a racemose inflorescence measuring up to 35 cm in length by 3 cm in width. The peduncle itself may be up to 25 cm long and 8 mm wide, while the rachis, which is longer in male plants, reaches 16 cm. Pedicels are one-flowered, measure up to 14 mm in length, and may have a 1 mm basal bract. Tepals, which are up to 4 mm long, are ovate-elliptic in females and orbicular to ovate in males. Fruits reach 18 mm in length, while seeds measure around 6 mm. Male flowers sometimes produce a "faint, sweet fragrance".
  The vegetative parts of the plant are mostly glabrous, although an indumentum of velvety, brown hairs may be present on the spur.
caption: A particularly globose lower pitcher of this species
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