Nepenthes mikei

Nepenthes mikei

Synonymy

Nepenthes mikei Salmon & Maulder in Carniv. Pl. Newslett. 24: 82. 1995 sec. Cheek & Jebb 2001
    • Holotype: cult. ex Sumatra, S. Utara Province, Lake Toba, Mt Pangulubau, alt. 2000 m, 17 Feb 1995, B. Salmon & R. Maulder AK 221719 (AK).
  • =Nepenthes angasanensis Maulder, D.Schub., B.R.Salmon & B.Quinn in Carniv. Pl. Newslett. 28: 15, f. 1. 1999 syn. sec. Cheek & Jebb 2001
    • Holotype: Sumatra, Aceh Province, G. Puncak Angasan, slopes above Penosan, alt. 2500 m, 25 Sep 1997, B. Salmon & R. Maulder 234372 (AK).
    • Isotype: Sumatra, Aceh Province, G. Puncak Angasan, slopes above Penosan, alt. 2500 m, 25 Sep 1997, B. Salmon & R. Maulder 234372 (BO).
    • Isotype: Sumatra, Aceh Province, G. Puncak Angasan, slopes above Penosan, alt. 2500 m, 25 Sep 1997, B. Salmon & R. Maulder 234372 (K).

Other sources

Nepenthes sp. Hopkins B. Salmon & Maulder: Jebb, M.H.P. & Cheek, M.R. 1997: A skeletal revision of Nepenthes. – Blumea 42(1): 1-106: 63 (as Nepenthes sp. Hopkins B. Salmon & Maulder)

Description

Terrestrial climber to 3(-9) m tall. Stems terete or slightly 2-angular-ridged; rosette stem 2 mm diam., internodes 1-6 mm long; climbing stem slightly flexuose, (1.5-) 2-2.5(-3) mm diam., internodes (1.5-)3-5(-6.5) cm, axillary buds broadly conical, 0.5-1 by 1-1.5 mm, 2-4 mm above the axil. Leaves coriaceous, sessile, rosette leaves narrowly oblanceolate-elliptic, 3-7 by 0.6-1.3 cm, apex obtuse to acute, not peltate, base clasping the stem for 1/2 its circumference; leaves of climbing stems narrowly oblanceolate-oblong, 3.5-15 by 0.7-2.5 cm, apex acute, base clasping the stem for 1/2 the circumference, winged, the wings sometimes decurrent to the node below as two low ridges; rarely perfoliate-adnate. Longitudinal nerves 1-3 on each side of the midrib in the outer 1/3 of the blade, inconspicuous. Pennate nerves perpendicular, few, in-conspicuous. Lower pitchers ovoid in the lower half, cylindrical above, 3.5-11.5 by 0.9-2 cm, the upper part 3/4 the breadth of the lower, with two fringed wings 1-2 mm broad, fringed elements 2-3.5 mm long, 0.5-1 mm apart, mouth ovate, concave, oblique, peristome cylindrical, 0.75-1 mm wide, with inconspicuous ribs, outer and inner edges entire; lid elliptic or ovate, 0.8-2 by 0.6-1.8 cm, apex rounded, base rounded or shallowly cordate, lower lid lacking appendages, nectar glands inconspicuous, sparsely and evenly scattered, bordered, circular, 0.1 mm diam.; spur 2-6 branched, divided from the base or from about 1/2 its length, 4-6 mm long. Upper pitchers resembling the lower, but more contracted at the midpoint, to about 1/2 the diameter of the basal part, often widening slightly towards the mouth, 3.5-13 by 0.9-2 cm, lacking fringed wings; mouth strongly oblique, peristome 0.75-1.5 mm broad, ribs inconspicuous, 0.25-0.5 mm apart, outer edge entire, inner entire or shallowly toothed; lid 1.1-1.9(-3.8) by 0.8-1.3(-2.1) cm, nectar glands and spur as lower pitchers. Male inflorescence 3.8-15 by 1-1.8 cm; peduncle 1.5-3 cm long, 1 mm diam. at the base; partial peduncles c. 20(-45?), 1-flowered; pedicels 3-6 mm long; bracts absent; tepals oblong, 2-3 by 1 mm; androphore 1(-1.2) mm long; anther head 1 by 1 mm. Infructescence 5-9 by 4.5-5 cm; peduncle 1.5-5.2 cm long, 1.1-1.5 mm diam. at base; fruits 6-10, valves 1.7-2.2 by 0.2-0.3 cm. Seeds filiform, 10.5 by 0.5 mm. Indumentum ab-sent from stem apart from a cluster of white hairs around the axillary bud; leaves with sessile red glands 0.1 mm diam. on the lower surface, otherwise glabrous; pitchers, upper lid and spur sparsely covered with white appressed simple hairs c. 0.5 mm long; inflorescence from base of peduncle to apex of pedicel sparsely (rarely densely) sericeous with the same hair type; lower tepals with minute white stellate hairs; ovary densely fawn sericeous; androphore glabrous. Colour of specimens black when dry; live stem purplish black; pitchers purplish black, splashed one part in ten with cream; tepals dirty purplish or brown.A

Notes

First noted by Hopkins, Maulder, Maulder & Salmon (1990) in Carniv. Pl. Newslett. 19: 23 (f.) & 25. - http://legacy.carnivorousplants.org/cpn/articles/CPNv19n1_2p19_28.pdf. This was cited in the list of synonyms by Jebb & Cheek (2001). B
Nepenthes mikei has long been confused with N. tobaica with which it looks extremely similar, but differs in the branched (not simple) spur and the 1-flowered (not 2-flowered) partial peduncles.
Van Steenis 8331A represents an exceptionally large specimen of this otherwise morphologically uniform species, and accounts for the higher figures in the dimensions given in the description above for pitcher and leaf. It may represent a hybrid with another species such as the sympatric N. densiflora.
The type material of N. mikei, on which the protologue description appears solely based, was cultivated in New Zealand from material collected by its authors on Mt Pangulubau in 1989.
Nepenthes angasanensis Maulder, D. Schubert, B. Salmon & B. Quinn was published (Salmon & Maulder, Carnivorous Plant Newsl. 28 (1999) 15) in the closing stages of this manuscript. The authors argue that specimens we assigned to this species in Blumea 42 (1997) 63 represent a separate taxon. We suspect that it may prove not distinct from N. mikei and here treat it as a synonym.A

Distribution (General)

Sumatra: Aceh & Sumatera Utara Provinces, Angasan to Lake TobaA

Etymology

Named for Mike Hopkins of New Zealand.A

Habitat

Mossy forest and scrub, especially on ridges; 1100-2500 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
1995-02-17Salmon, B.R. & Maulder, R. AK 221719AK
Citation: cult. ex Sumatra, S. Utara Province, Lake Toba, Mt Pangulubau, alt. 2000 m, 17 Feb 1995, B. Salmon & R. Maulder AK 221719.

Specimen summary: AK
Holotype of Nepenthes mikei Salmon & Maulder Nepenthes sp. Hopkins B. Salmon & Maulder

1997-09-25Salmon, B.R. & Maulder, R. 234372AK, BO, K
Citation: Sumatra, Aceh Province, G. Puncak Angasan, slopes above Penosan, alt. 2500 m, 25 Sep 1997, B. Salmon & R. Maulder 234372.

Specimen summary: AK
Holotype of Nepenthes angasanensis Maulder, D.Schub., B.R.Salmon & B.Quinn

Specimen summary: BO
Isotype of Nepenthes angasanensis Maulder, D.Schub., B.R.Salmon & B.Quinn

Specimen summary: K
Isotype of Nepenthes angasanensis Maulder, D.Schub., B.R.Salmon & B.Quinn