Nepenthes burkei

Nepenthes burkei

Synonymy

Nepenthes burkei Mast. in Gard. Chron. ser. 3, 6: 492, f. 69; 566. 1889, , sec. Cheek & Jebb 2001
    • Lectotype: Philippines, cultivated from material collected by David Burke from Mindoro, J. Veitch & Sons s.n. (K).
  • =Nepenthes burkei var. prolifica Mast. in Gard. Chron. ser. 3, 8: 184. 1890 syn. sec. Cheek & Jebb 2001
  • =Nepenthes burkei var. excellens Veitch in J. Roy. Hort. Soc. 21: 233. 1897 syn. sec. Cheek & Jebb 2001

Other sources

Kurata, S. & Toyoshima 1972: Phillipine Species of Nepenthes. – Gard. Bull. Singapore 26: 155-158: 155
Jebb, M.H.P. & Cheek, M.R. 1997: A skeletal revision of Nepenthes. – Blumea 42(1): 1-106: 28

Description

Terrestrial or epiphytic climber 1-2 m tall. Stem terete, ± 4 mm diam., apparently climbing. Leaves subcoriaceous, sessile, those of basal rosettes unknown; leaves of short stems narrowly oblanceolate-oblong, 8.5-26 by 1.2-2.9(-3.5) cm, apex obtuse, inconspicuously peltate, base gradually attenuate, ± 1.1 cm wide at the base, clasping the stem for 1/2 its circumference, decurrent for up to 1.5 cm with wing 2-3 mm wide, not auriculate or sheathed; leaves of climbing stems shorter and more oblong, scarcely de-current. Longitudinal nerves 4 on each side of the midrib, evenly spread, fairly conspicuous. Pennate nerves held at 90° from midrib, sinuous, scattered, inconspicuous. Lower pitchers unknown, not produced? Upper pitchers broadly cylindrical, 10-17.5 cm long, 3.7-8 cm wide in the basal half, gradually constricted to 4-4.5(-6.7) cm at the centre, flaring slightly to 4.3-6 cm wide below the peristome; wings not fringed, reduced to ridges < 1 mm wide; mouth elliptic, oblique, straight or slightly concave, peristome flattened, 11-12 mm wide, bearing coarse ribs (0.7-)1 mm apart interspersed with 10-15 striae, outer edge with 4-6 undulations each protruding ± 3 mm, inner edge with coarse teeth; lid elliptic, 3.8-6.3(-8) by 2.9-3.8(-5) cm, apex broadly acute, base rounded, lower surface lacking appendages, nectar glands transversely elliptic 0.5-0.7 mm wide, slightly raised but unbordered; spur stout, cylindrical, 7-10 mm long. Inflorescences unknown. Infructescence 26 cm long, peduncle 17 cm long; partial peduncles ± 55, 1-flowered, lacking bracts, 6-8 mm long. Fruit valves up to 15 mm long. Seed unknown. Indumentum absent from stems and leaves; pitchers subglabrous, with scattered, inconspicuous, translucent appressed simple hairs 0.5 mm long. Colour of pitchers dull green spotted with red-purple, interior of pitcher waxy yellow, rarely violet, overlain with glaucous bloom, peristome deep red.A

Notes

Nepenthes burkei is closely related to N. ventricosa of Luzon and even more closely related to N. sibuyanensis of Sibuyan. Nepenthes burkei can be distinguished from the former by the less strongly waisted, green-blotched purple pitchers with lid as large as mouth. In N. ventricosa the pitchers are more narrowly waisted, glossy yellowish white, with lids much smaller than the mouth. Nepenthes sibuyanensis has non-waisted, massive pitchers.A
Cited as "Nepenthes × burkei Hort.Veitch, Gard. Chron. ser. 3, 6: 492, 493, f. 69. 1889" in IPNI (acc. 19 Mar 2017), with "Original Data: Notes: Hybr. artef" - but in the original description there seems to be no indication of the hybrid nature of the species.B

Distribution (General)

Philippines: Mindoro and Panay Islands.A

Habitat

Not recorded; 1300-1600 m.A

Bibliography

A. Cheek, M.R. & Jebb, M.H.P. 2001: Flora Malesiana - Nepenthaceae, Series I, Volume 15
B. Berendsohn, W.G. 2017+: Compilation of Nepenthes data for the Caryophyllales taxonomic backbone.

Specimens

CountryDateCollector + collecting numberHerbariaTypeScanDerivatives
PhilippinesJ. Veitch & Sons s.n.K
Citation: Philippines, cultivated from material collected by David Burke from Mindoro, J. Veitch & Sons s.n.

Specimen summary: K
Lectotype of Nepenthes burkei Mast.