Nepenthes longifolia

Nepenthes longifolia

Synonymy

Nepenthes longifolia Nerz & Wistuba in Carniv. Pl. Newslett. 23(4): 105 (-106, fig. 3). 1995 sec. Clarke 2001
    • Holotype: Sumatra, West Sumatera, Taram, Tjampo Mts, alt. 1000 m, 25 Sep 1992, J. Nerz 2801 (L).
  • Nepenthes rafflesiana var. longicirrhosa Tamin & M. Hotta, Tamin & M. Hotta - in M.Hotta, Divers. & Dynam. Pl. Life Sumatra. 1986: 93, nom. nud., syn. sec. Clarke 2001

Description

Stems climbing, often up to 10 m; part with adult leaves cylindrical 5-6 mm thick. Leaves of the rosette and short shoots lanceolate, sometimes lanceolate-spatulate, up to 50 cm long, obtuse, gradually attenuate into a short at most 5 cm long petiole, laterally flattened sheath clasping the stem for about 2/3. Pennate nerves numerous, indistinct, reticulate. The longitudinal ones 3-4 each side, running parallel in the outer half of the leaf. Tendrils shorter or up to as long as the lamina, without curl. Pitchers of the rosette very shortly incurved from the hanging tendrils, ventricose in the lower part, cylindrical in the upper part, up to 12 cm high, up to 4-5 cm broad in the lower part, up to 2-3 cm broad in the upper part, with two fringed wings over nearly the whole length. The wings about 3-4 mm broad, the fringe- segments 5-6 mm long, 1-3 mm apart. Mouth oblique, elevated and acuminate towards the lid. Peristome flattened, 6 mm wide, distinctly raised and usually slightly crumpled in front up to 5 mm on the sides, the ribs 0,2 mm apart. The interior margin entire. Inner surface of the pitcher glandular in the ventricose part with 500 overarched glands/cm2 . Lid orbicular, 2-3 cm in diameter, the interior surface without appendages, with large round to ovate glands towards the midrib, glandless towards the margin. Spur non-branched, up to 1 cm long. Leaves of the climbing stems lanceolate up to 30 cm long, 4-5 cm broad, ending in a distinct 6-7 cm long petiole, decurrent in two narrow wings, 1-2 mm wide, over almost the whole length of the internode. Pennate nerves numerous, indistinct, reticulate. The longitudinal ones 3-4, on each side, running parallel in the outer half of the leaf. Tendrils shorter or up to as long as the lamina, often with curl. Pitchers of the climbing stem gradually originating from the hanging end of the tendril, incurved with a curve up to 4 cm wide, narrowly infundibuliform in the lower half, tubulose in the upper half, 18-25 cm high, 2,5-3,5 cm wide with two prominent ribs over the whole length. Mouth oblique, elevated and acuminate towards the lid. Peristome flattened up to 6 mm wide, distinctly raised and crumpled in front with 3 prominent folds, up to 5 mm on the sides, the ribs 0,2 mm apart. The interior margin entire. Inner surface of the pitcher glandular in the infundibulate part with 500 overarched glands/cm2. Lid orbicular, 2-3 cm in diameter, the interior surface without appendages, with large, round to orbicular glands towards the midrib, glandless towards the margin. Spur non-branched, up to 1 cm long. Male flower a raceme. Peduncle 15-20 cm long, about 3 mm thick at the base, 1 mm thick at the top, the axis 10-12 cm long, pedicels all of them two-flowered, without bract, up to 1-1,2 cm long. Tepals narrow elliptical 4-5 mm long. Staminal column 5 mm long, the anthers included. Female inflorescence unknown. Indumentum sparse, with stellate hairs. Margin of the leaves densely covered with red hairs. Colour ofherbarium specimen: leaves greenish brown, pitchers brown. Colour of living specimen: Leaves green, underside sometimes reddish, leaves of the rosette often with a red midrib. Lower pitchers brownish red, peristome usually green to reddish-green, innerside of the pitcher pale green, lid red. Pitcher of the climbing stem light green.A

Notes

Jebb & Cheek (1997) and Cheek & Jebb (2001) treated N. longifolia Nerz & Wistuba as a synonym of N. sumatrana, but Clarke (2001) points to a number of differences that in his opinion justify to maintain them as separate species. B

Distribution (General)

Sumatra - Sumatra Utara and Sumatra BaratB

Habitat

Light submontane forest; 1000 m a.s.l. A

Bibliography

A. Nerz, J. & Wistuba, A. 1995: Five new taxa of Nepenthes (Nepenthaceae) from North and West Sumatra. – Carniv. Pl. Newslett. 23(4): 101-114
B. Clarke, C.M. 2001: Nepenthes of Sumatra and Peninsular Malaysia

Specimens

CountryDateCollector + collecting numberHerbariaTypeScanDerivatives
1992-09-25Nerz, J. 2801L
Citation: Sumatra, West Sumatera, Taram, Tjampo Mts, alt. 1000 m, 25 Sep 1992, J. Nerz 2801.

Specimen summary: L
Holotype of Nepenthes longifolia Nerz & Wistuba