Nepenthes talangensis

Nepenthes talangensis

Synonymy

Nepenthes talangensis Nerz & Wistuba in Carniv. Pl. Newslett. 23(4): 101, f. 1. 1995 sec. Nerz & Wistuba 1995
    • Holotype (designated by Nerz, J. & Wistuba, A. 19951): G. Talang, 2200 m, W-Sumatra, 6 Sep 1986, J. Nerz 2501 (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

Plants usually growing as rosettes and only rarely climbing. Climbing stems reaching up to 2-3 m high, the part with adult leaves 6-10 mm thick, cylindrical to obtusely angular, internodes 0.5-10 cm long, leaves of the rosettes and climbing stems thick, coriaceous sessile, lanceolate-spathulate, about 10-15 cm long, up to 3 cm broad, apically acute or obtuse, attenuate towards the base, leaves clasping the stem, not decurrent; Pennate nerves, irregularly reticulate, on each side several (10-15) originating irregularly from the midrib, longitudinal nerves running parallel in the outer 1/3 part of the lamina. Tendrils usually without curl, once to twice as long as the lamina. Pitchers of the rossettes originating with a short curve, 5 mm wide from the hanging end of the tendril, thick- coriaceous, widely infundibuliform, 8-12 cm high, 3-5 cm wide, somewhat contracted below the mouth, with 2 fringed wings. The wings 2-5 mm wide, the fringe segments 3-10 mm long, 0,5-1,0 mm apart; mouth almost horizontal in front, elevated towards the lid and elongated into a short neck. Peristome flattened, 8-15 mm wide, the ribs 1/3-1 mm apart, the teeth of the inner margin 2-3 times as long as broad. Innerside of the pitcher wholly glandular with a glandless triangle below the lid. Large slightly overarched glands, 300/cm2. in the lower part of the pitcher, smaller ones, 500/cm2 in the upper part. Lid broadly ovate, undulate at the margin. Lower surface without appendage, with rather large glands, especially near the midrib, glandless near the margin. Three prominent nerves on each side of the midrib. Spur broad and flattened, 2-5 mm long, branched, inserted close to the lid. Pitchers of the climbing stems originating with a short curve, 5 mm wide from the hanging end of the tendril, thick- coriaceous, tubulous to narrow infundibuliform in the lower half, ovate in the upper half, 8-12 cm high, 3-5 cm wide, somewhat contracted below the mouth, with 2 prominent ribs; mouth almost horizontal in front, elevated towards the lid and elongated into a short neck. Peristome flattened, 8-15mm wide, the ribs 1/3-1 mm apart, the teeth of the inner margin 2-3 times as long as broad. Interior surface of the pitcher wholly glandular with a glandless triangle blow the lid. Large, slightly overarched glands, 300/cm2 in the lower part of the pitcher, smaller ones, 500/cm2 in the upper part. Lid broadly ovate, undulate at the margin. Lower surface without appendage, with rather large glands, especially near the midrib, glandless near the margin. Three prominent nerves on each side of the midrib. Spur broad and flattened, 2-5 mm long, branched, inserted close to the lid. Male inflorescence a raceme, the peduncle 4-5 mm long, 1-1,5 mm thick, the axis 6-8 cm long, obtusely angular, the pedicels all of them 1 flowered, the lower ones 10 mm long, the upper ones a little shorter, almost all of them with a filiform bract, up to 4 mm long. Tepals elliptical to oblong, 4 mm long. Staminal column, the anthers included, 3-4 mm long. Female inflorescence unknown. Indumentum on the vegetative part very sparse with non branched hairs, margin of the leaves, densely covered with non branched hairs. Indumentum of inflorescence very sparse. Colour of herbarium specimens: Brown to dark-brown. Colour of living specimens: Vegetative parts light green, leaves with white hair at the margins, pitchers yellowish-white with numerous dark red spots. Peristome yellow or red, lid yellowish white with numerous red spots.A

Notes

Cheek & Jebb (2001) state that "specimens from Mt Talang have been distinguished as N. talangensis, which may well merit recognition on the basis of photographs we have seen. However, we have not yet viewed the type specimens and for the meantime are leaving it as a synonym of N. bongso.B
Danser, according to data given in his monograph of 1928, examined material of this species (Bunnemeijer 2552 (L); Bunnemeijer 5398 (L); Bunnemeijer 6740 (BO)). Erroneously he placed these specimens under Nepenthes bongso. Recent field studies of Nepenthes talangensis at G. Talang by Nerz in 1986 and of Nepenthes bongso at G. Singgalang by Mr. and Mrs. DeWitte in 1993 (pers. com.) showed clearly that both are distinct species. This was also confirmed by the studies of available herbarium-material of Nepenthes talangensis (The Bunnemeijer specimens cited above) and herbarium-material of Nepenthes bongso (the type). A

Distribution (General)

Indonesia: West Sumatra, Gunung TalangA

Habitat

In alpine regions above the tree-zone, 2200-2600 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. Berendsohn, W.G. 2017+: Compilation of Nepenthes data for the Caryophyllales taxonomic backbone.

Specimens

CountryDateCollector + collecting numberHerbariaTypeScanDerivatives
1986-09-06Nerz, J. 2501L
Citation: G. Talang, 2200 m, W-Sumatra, 6 Sep 1986, J. Nerz 2501.

Specimen summary: L
Holotype of Nepenthes talangensis Nerz & Wistuba