Nepenthes manobo
Synonymy
Nepenthes manobo in Philippine J. Sci. 146(2): 161 (-164, fig. 3-4). 2017 [The specific epithet was chosen to acknowledge the indigenous tribe of the manobo. N. manobo occurs in the ancestral territory of the manobo communities in the Pantaron range.B]. sec. Lagunday & al. 2017
- Type (designated by Lagunday, N. E., Acma, F. M., Cabana, V. G., Sabas, N. M. & Amoroso, V. B. 20171): Philippines, Mindanao, Pantaron range, Bukidnon, Municipality of San Fernando, Mt. Malimumu (1,016 m), 09. 02. 2014, N.E. Lagunday, M. Acopio, N.M. Sabas, holotype 00009842, Central Mindanao University Herbarium (CMUH), Musuan, Bukidnon, Philippines.
Description
A terrestrial, climbing vine. Stems up to 5 m long, glabrous, terete to triangular in transection, up to 6 mm in diameter; internodes are up to 2.5 cm in length. Leaves are sessile, broadly linear, acute leaf apex with 3 nerves on either side of the midrib. They are up to 21 cm long and 3.6 cm wide.
Lower pitchers are up to 17 cm long, 3.5 to 6 cm wide in the lower half. The bottom half is bulbous or ovate forming a hip becoming cylindrical or slightly funnel-shaped towards the opening. Wings run down the entire front of the trap, fringed with filaments up to 4 mm long. The pitcher opening is oblique tapering posteriorly towards the lid. The peristome is ribbed, slightly flattened, tapering posteriorly forming a distinct vertically oriented neck, they are up to 1 cm wide and up to ca. 0.8 mm space between ribs. The peristome inner margin has teeth-like projections that are short and triangular with nectar glands that are proximally sunken in the semilunar depressions between the ribs with canals emptying into the inner pitcher walls.
The lid is ovate, with large and small round nectar glands evenly distributed in the lower lid surface. The lid is up to 5.6 cm long and 4.8 cm wide with an appendage reduced to a keel. The lid spur is filiform tapering towards the apex and occasionally branched up to 1.2 cm long and up to 1 mm in diameter. The tendrils are non-coiling, up to 25 cm long and 4 mm in diameter.
The exterior of the pitcher is entirely light coral red or khaki yellow and may have peach puff four brown blotches; bottom is khaki yellow with goldenrod brown blotches, becoming chocolate brown with sangria and brick red blotches as it matures.
Upper pitcher bottom half is slightly inflated tapering towards the tendril becoming cylindrical in the middle forming a hip becoming slightly funnel-shaped towards the ovate opening, up to 19.1 cm long and 5 cm wide in the lower half. The wings are reduced to ridges. The pitcher opening is oblique tapering towards the lid forming a distinct vertically oriented neck. The peristome is ribbed, cylindrical in transection, up to 1 cm wide and up to ca. 0.8 mm space between the ribs. The lid is orbicular to ovate, 2.4 to 5.8 cm long and 2.7 to 5 cm wide; appendage is reduced to a keel. The lid spur is filiform and unbranched, 4 to 5 mm long and up to 1 mm in diameter. The tendrils are coiling to non-coiling, up to 31 cm long and 3 mm in diameter. The nectar gland distribution, coloration and indumentum are consistent with the lower pitchers.
Male inflorescence is a panicle composed of a 4.5 cm long and 5 mm wide scape and an additional 23.5 cm rachis. The partial peduncles are two-flowered up to 4 mm long. The pedicels bearing the florets are up to 1.6 cm long. The petal is tetramerous, ovate, with huge round to elongated nectar glands in the upper surface, up to 5 mm long, and up to 3 mm wide. The pollen is round and trilete. The female inflorescence has not been observed during sampling.
The indumentum is a multicellular trichome, glandular to non-glandular which is present in the flower and sparse in the tendril, pitcher exterior and in the scape.A
Lower pitchers are up to 17 cm long, 3.5 to 6 cm wide in the lower half. The bottom half is bulbous or ovate forming a hip becoming cylindrical or slightly funnel-shaped towards the opening. Wings run down the entire front of the trap, fringed with filaments up to 4 mm long. The pitcher opening is oblique tapering posteriorly towards the lid. The peristome is ribbed, slightly flattened, tapering posteriorly forming a distinct vertically oriented neck, they are up to 1 cm wide and up to ca. 0.8 mm space between ribs. The peristome inner margin has teeth-like projections that are short and triangular with nectar glands that are proximally sunken in the semilunar depressions between the ribs with canals emptying into the inner pitcher walls.
The lid is ovate, with large and small round nectar glands evenly distributed in the lower lid surface. The lid is up to 5.6 cm long and 4.8 cm wide with an appendage reduced to a keel. The lid spur is filiform tapering towards the apex and occasionally branched up to 1.2 cm long and up to 1 mm in diameter. The tendrils are non-coiling, up to 25 cm long and 4 mm in diameter.
The exterior of the pitcher is entirely light coral red or khaki yellow and may have peach puff four brown blotches; bottom is khaki yellow with goldenrod brown blotches, becoming chocolate brown with sangria and brick red blotches as it matures.
Upper pitcher bottom half is slightly inflated tapering towards the tendril becoming cylindrical in the middle forming a hip becoming slightly funnel-shaped towards the ovate opening, up to 19.1 cm long and 5 cm wide in the lower half. The wings are reduced to ridges. The pitcher opening is oblique tapering towards the lid forming a distinct vertically oriented neck. The peristome is ribbed, cylindrical in transection, up to 1 cm wide and up to ca. 0.8 mm space between the ribs. The lid is orbicular to ovate, 2.4 to 5.8 cm long and 2.7 to 5 cm wide; appendage is reduced to a keel. The lid spur is filiform and unbranched, 4 to 5 mm long and up to 1 mm in diameter. The tendrils are coiling to non-coiling, up to 31 cm long and 3 mm in diameter. The nectar gland distribution, coloration and indumentum are consistent with the lower pitchers.
Male inflorescence is a panicle composed of a 4.5 cm long and 5 mm wide scape and an additional 23.5 cm rachis. The partial peduncles are two-flowered up to 4 mm long. The pedicels bearing the florets are up to 1.6 cm long. The petal is tetramerous, ovate, with huge round to elongated nectar glands in the upper surface, up to 5 mm long, and up to 3 mm wide. The pollen is round and trilete. The female inflorescence has not been observed during sampling.
The indumentum is a multicellular trichome, glandular to non-glandular which is present in the flower and sparse in the tendril, pitcher exterior and in the scape.A
Conservation
Classified as Critically Endangered [CR B1ab (i)]; extent of occurrence estimated to be less than 10 km².A
Habitat
Strictly terrestrial in a narrow altitude range at 1,000-1,020 m a.s.l. along the ultramafic ridge trails of Mt. Malimumu, in mixed dipterocarp forest mostly covered with gravel and rocks.A
Specimens
| Country | Date | Collector + collecting number | Herbaria | Type | Scan | Derivatives | |
|---|---|---|---|---|---|---|---|
| Philippines |  | ||||||
| Citation: Philippines Specimen summary: Philippines, Mindanao, Pantaron range, Bukidnon, Municipality of San Fernando, Mt. Malimumu (1,016 m), 09. 02. 2014, N.E. Lagunday, M. Acopio, N.M. Sabas, holotype 00009842, Central Mindanao University Herbarium (CMUH), Musuan, Bukidnon, Philippines. Type for: Nepenthes manobo Lagunday, Acma, Cabana, Sabas & Amoroso | |||||||