Nepenthes petiolata

Nepenthes petiolata

Synonymy

Nepenthes petiolata Danser in Bull. Jard. Bot. Buitenzorg, sér. 3, 9: 353, f. 18. 1928 sec. Cheek & Jebb 2001
    • Holotype: Philippines, Mindanao, Agusan Province, Mt Urdaneta, alt. 1700 m, Sep 1912, A. Elmer 13705 p.p. (BO).

Other sources

Kurata, S. & Toyoshima 1972: Phillipine Species of Nepenthes. – Gard. Bull. Singapore 26: 155-158: 158
Jebb, M.H.P. & Cheek, M.R. 1997: A skeletal revision of Nepenthes. – Blumea 42(1): 1-106: 74

Description

Terrestrial climber to at least 1 m tall. Stem shape and diam. unknown. Leaves thinly chartaceous, petiolate, blade elliptic-oblong, 10-15 by 3-5.5 cm, apex acute, base cuneate, tapering into the petiole; petiole 5.5-6 by 0.3-0.5 cm, subcanaliculate, wing 1-2 mm wide, clasping the stem for 2/3 its diameter and sheathing. Longitudinal nerves 3 or 4 each side of the midrib in the marginal third, conspicuous. Pennate nerves normal or slightly oblique, branching before reaching the longitudinal nerves, branches reaching the margin. Intermediate pitchers only known, subcylindrical, the lower half slightly dilated, the upper half shortly cylindrical, 7-13 by 2-4 cm; with two fringed wings in the upper 2/3, the wings to 3 mm broad, the fringed elements c. 4 mm long, c. 3 mm apart; the mouth ovate-acuminate, concave, oblique, rising gradually from the front to form a broad, vertical column for the lid at the rear; peristome flattened to 9(-15) mm broad near the lid, ribs 1(-2) mm apart, high, outer edge slightly sinuate, inner edge long-dentate; lid broadly ovate to broadly elliptic, 3.5 by 3 cm, apex rounded, base rounded, then abruptly and inconspicuously cordate at the spur; lower surface lacking appendages or barely carinate at the base, nectar glands scattered, inconspicuous, thinly bordered, longitudinally elliptic, or orbicular, c. 0.2 mm diam.; spur unknown. Inflorescence unknown. Fruit and seed unknown. Indumentum of leaf margin ciliate, hairs 0.8 mm long, tendril, pitcher and midrib villose to puberulent with hairs 0.4 mm long. Colour of pitchers olive and maroon, mouth maroon, peristome crimson.A

Notes

Characterised by its slender pitchers which lack appendages on the lower surface, by its thin, deeply flanged peristome ribs, with long flattened teeth, and also by the petiolate leaves. Nepenthes petiolata is unlikely to be confused with any other Mindanaoan species. Nepenthes mira is probably the most similar Philippine species but differs in the broadly ellipsoid lower pitchers and infundibuliform upper pitchers.
This species is only known from three incomplete specimens. No fertile material is known. The affinities of this species are unclear and more collections are needed if this is to be rectified.A

Distribution (General)

Philippines: Mindanao (Agusan&Surigao Provinces).A

Habitat

Montane or submontane forest including Agathis and Oak, possibly on ultramafic soils; 1500 m.A

Bibliography

A. Cheek, M.R. & Jebb, M.H.P. 2001: Flora Malesiana - Nepenthaceae, Series I, Volume 15

Specimens

CountryDateCollector + collecting numberHerbariaTypeScanDerivatives
1912-09-��Elmer, A.D.E. 13705 p.p.BO
Citation: Philippines, Mindanao, Agusan Province, Mt Urdaneta, alt. 1700 m, Sep 1912, A. Elmer 13705 p.p.

Specimen summary: BO
Holotype of Nepenthes petiolata Danser