Nepenthes tenuis

Nepenthes tenuis

Synonymy

Nepenthes tenuis Nerz & Wistuba in Carniv. Pl. Newslett. 23(4): 104, f. 2. 1995 sec. Clarke 2001
    • Holotype (designated by Nerz, J. & Wistuba, A. 19951): Sumatra, Taram, river Tjampo, alt. 1000 m, 24 Aug 1957, Meijer 6949 (L).
  • 1. Nerz, J. & Wistuba, A. 1995: Five new taxa of Nepenthes (Nepenthaceae) from North and West Sumatra. – Carniv. Pl. Newslett. 23(4): 101-114

Description

Stems climbing, slender, the climbing part of the stem angular to rhomboid, 2-3 mm thick, the internodes 5-6,5 cm long. Rosettes and basal part of the stem unknown.
Leaves of the climbing stems scattered, thin- coriaceous, sessile, lanceolate 5-6 cm long, 1-1,5 cm broad, acute, attenuate at the base, clasping the stem for 2/3 without sheath. Nervation indistinct, the pennate nerves oblique, irregularly reticulate, the longitudinal ones about 3 on both sides originating from the basal 1/3 part of the midrib running parallel in the outer 1/2 of the lamina. Tendrils 1,5 x as long as the lamina, 0,5-1 mm thick, usually without curl. Indumentum sparse.
Pitchers of the climbing stems gradually originating from the hanging end of the tendril incurved with a 10 mm wide curve, widely infundibuliform, contracted under the mouth 2,5-4,5 cm high, 1,5-2,5 cm wide. 2 prominent ribs, 3-5 mm apart without fringes. Mouth ovate, almost horizontal, peristome flattened 6 mm wide, the ribs 1/8 mm apart. Inner surface of the pitcher with numerous small glands, about 600-800 on 1 cm2. Lid narrow-elliptic 1,5-2,5 cm long, 0,5-0,8 cm wide with 2 prominent nerves, one on each side of the midrib. Glands evenly distributed on the underside of the lid. Spur unbranched, up to 1 mm long inserted close to the lid.
Colour of herbarium specimens: dark brown. Colour of living specimens: pitchers with red-brown dots, peristome dark red-brownish.A

Notes

Cheek & Jebb (2001) treat this as a synonym of Nepenthes dubiaB

Distribution (General)

Indonesia, Sumatra, Sumatera Barat ProvinceC

Habitat

On a ridge at 1000 m altitude.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. Berendsohn, W.G. 2017+: Compilation of Nepenthes data for the Caryophyllales taxonomic backbone.
C. Clarke, C.M. 2001: Nepenthes of Sumatra and Peninsular Malaysia

Specimens

CountryDateCollector + collecting numberHerbariaTypeScanDerivatives
1957-08-24Meijer 6949L
Citation: Sumatra, Taram, river Tjampo, alt. 1000 m, 24 Aug 1957, Meijer 6949.

Specimen summary: L
Holotype of Nepenthes tenuis Nerz & Wistuba