Nepenthes glabrata

Nepenthes glabrata


Nepenthes glabrata J.R.Turnbull & A.T.Middleton [as "glabratus"], Reinwardtia 10(2): 107. 10.2.1984 [as "glabratus"] sec. Cheek & Jebb 2001 wfo-0001302551
      Holotype: C Sulawesi, Tri Tunggal Eboni Corp. logging concession, alt. 1666 m, 1°33'S, 120°55'E, 31 Aug 1983, J.R. Turnbull & A.T. Middleton 83113a (BO)
  • 1. Type: Kurata, Atsumi & Komatsu 149a (holo, not indicated, probably Nippon Dental College, plate in Sh. Kurata, l.c. p. 44) C Sulawesi, route from Malei to Kajoga

Other sources

Nepenthes glabrata J.R.Turnbull & A.T.Middleton: Jebb, M. H. P. & Cheek, M. R. 1997: A skeletal revision of Nepenthes. – Blumea 42(1): 1-106. p 41 (as Nepenthes glabrata J.R.Turnbull & A.T.Middleton)


Terrestrial climber to 2-3 m tall. Climbing stems terete or slightly 2-ridged, 2-3 mm diam., internodes (2-)2.5-3 cm; stems of short shoots and rosettes not seen. Leaves chartaceous, sessile; rosette leaves linear or highly reduced, those of climbing stems narrowly oblong-ligulate or narrowly oblanceolate, 8.5-12 by 1.2-1.8(-3) cm, apex acute, inconspicuously peltate, base slightly attenuate, clasping the stem by 1/3-1/2 its circumference, decurrent as very low ridges to the node below or ridges absent. Longitudinal nerves 1(-3) on each side of the midrib, about a third the distance from the margin, inconspicuous. Pennate nerves patent, soon branching, inconspicuous. Lower pitchers reported as globose. Upper pitchers shortly cylindrical to slightly infundibuliform, 7.4-14 by 2-3 cm, with two non-fringed wings 5-10 mm wide; mouth oblique, slightly concave, suborbicular; peristome cylindrical, 1-1.25(-2.5) mm diam., with indistinct ribs 0.1 mm high, 0.25-0.5 mm apart, outer edge entire, inner edge lacking teeth; lid orbicular, slightly broader than long, 2.7-2.8 by 2.6-3.1 cm, apex rounded to truncate, base truncate, venation palmate, the midrib branching and anastomosing with the lateral nerves c. 1 cm below the apex; lower surface lacking appendages, nectar glands scattered, inconspicuous, raised, bordered, circular pits 0.1-0.2 mm diam.; spur simple, slightly flattened, 5 by 0.5 mm, apex rounded. Male inflorescence racemose c. 20 by 1.5 cm; peduncle 7 cm long, 0.3 cm diam. at base; partial peduncles 1-flowered, c. 55; bracts absent; pedicels patent, 4-5(-8) mm long; tepals oblong, 2.5-3 by 1 mm, apex obtuse-rounded; androphore (1.5-)2 mm long; anther head 1-1.5 by 1.5 mm. Fruit unknown. Seed unknown. Indumentum absent from all parts except the spur and inflorescence; spur and rhachis to lower surface of tepals and lower half of androphore sparsely sericeous with white simple hairs 0.2 mm long. Colour of pitchers white with a few vertical red stripes; flowers red-green.A


The affinities of N. glabrata are unclear, but appear to be with N. muluensis of Sarawak (and thus the N. tentaculata group, since Clarke in Nepenthes of Borneo (1997) 109 has revealed the tentaculate nature of the lower pitchers of N. muluensis). Both species share an unusual lid nervation pattern and have upper pitchers of similar size, shape, and coloration. The coloration of this species, with its red-streaked pitcher, is distinctive. Turnbull & Middleton in their protologue to this species (see above) describe a number of features not apparent from the scant material available to us: young plants are said to have extremely narrow leaves with small globose pitchers, and rosette leaves of mature plants are said to have greatly reduced or even an absence of a blade.
Turnbull & Middleton’s material, including types of N. glabrata, was not found at Bogor in 1995 or 1996, and may never have been distributed. Kurata’s N. rubromaculata is a later homonym of a horticultural hybrid described in 1891. The type repository is not stated, but is presumably the herbarium of the Nippon Dental College. The holotype is illustrated in the original publication on page 44.A
Belongs to Nepenthes sect. Tentaculatae Cheek & Jebb.B

Distribution (General)

C Sulawesi.A


In open, high forest; 1600-2000 m.A


A. Cheek, M. R. & Jebb, M. H. P. 2001: Flora Malesiana - Nepenthaceae, Series I, Volume 15. – Leiden: Nationaal Herbarium Nederland, Universiteit Leiden branch
B. Cheek, M. R. & Jebb, M. H. P. 2016: A new section in Nepenthes (Nepenthaceae) and a new species from Sulawesi. – Blumea 61: 59-62


CountryDateCollector + collecting numberHerbariaTypeScanDerivatives
31 Aug 1983Turnbull, J. R. & Middleton, A.T. 83113aBO
Citation: C Sulawesi, Tri Tunggal Eboni Corp. logging concession, alt. 1666 m, 1°33'S, 120°55'E, 31 Aug 1983, J.R. Turnbull & A.T. Middleton 83113a

Specimen summary: BO
Holotype of Nepenthes glabrata J.R.Turnbull & A.T.Middleton