Nepenthes reinwardtiana

Synonymy

Nepenthes reinwardtiana Miq., Pl. Jungh.: 168. 1852 sec. Cheek & Jebb 20011

≡Nepenthes reinwardtii Hook.f. in Trans. Linn. Soc. London 22: 422. 1859 syn. sec. Cheek & Jebb 2001

1. Types: Junghuhn s.n. (sh. 00274, U), Sumatra, Batak region, Pager-utang, 600 m, Sept. 1840
OR Junghuhn s.n. (sh. 00273, U), Sumatra, Batak region, Simur-wasos, 1350 m
both n.v. for M. Cheek & M. Jebb, Flora Malesiana - Nepenthaceae, Series I, Volume 15. 2001

=Nepenthes reinwardtiana var. samarindaiensis J.H.Adam & Wilcock in Edinb. J. Bot. 50: 103. 1993 syn. sec. Cheek & Jebb 2001

Isotype: Borneo, E Kalimantan, Samarinda, S. Titan Complex, alt. 20 m, 3 Aug 1952, Meijer 1047 (BO)
Isotype: Borneo, E Kalimantan, Samarinda, S. Titan Complex, alt. 20 m, 3 Aug 1952, Meijer 1047 (K)
Holotype: Borneo, E Kalimantan, Samarinda, S. Titan Complex, alt. 20 m, 3 Aug 1952, Meijer 1047 (L)

=Nepenthes naquiyuddinii J.H.Adam & Hafiza in Int. J. Bot. 2(4): 431 (-433; figs. 1-2). 2006 syn. sec. Berendsohn & al. 2018

Type: Jumaat H.Adam JHA8016; Keningau-Kimanis Road, Taman Banjaran Crocker, 1400m, 30 Apr 2003. Holotype UKMB; isotype UKMB.

Content

Other sources

Tamin, R. & Hotta, M. 1986 – In: Hotta, M., Diversity and Dynamics of Plant Life in Sumatra. – Kyoto: Sumatra Nature Study (Botany), Kyoto University: 93

Phillipps, A. & Lamb, A.L. 1996: Pitcher Plants of Borneo: 132, f. 71

Danser, B. H. 1928: – Bull. Jard. Bot. Buitenzorg, sér. 3, 9: 363

Jebb, M. H. P. & Cheek, M. R. 1997: A skeletal revision of Nepenthes. – Blumea 42(1): 1-106: 78

Kurata, S. 1976: Nepenthes of Mt Kinabalu, Sabah. – Sabah National Parks Trustees, Kota Kinabalu: 65, t. 22

Clarke, C. M. 1997: Nepenthes of Borneo. – Kota Kinabalu: Natural History Publications: 123, f. 84-86

Adam, J. H. & Wilcock, C.C. 1998: – Sarawak Mus. J. 50: 75-77

Adam, J. H. & Wilcock, C.C. 1993: A new variety of Nepenthes reindwardtiana Miquel from Kalimantan, Borneo. – Edinb. J. Bot. 50: 99-104: 99

Description

Terrestrial or epiphytic shrub or climber 2-8(-20) m tall. Stem triangular, rarely ± rounded, 3-7.5 mm diam., the corners rounded or 2 with wings up to 3 mm broad. Leaves chartaceous, sessile; basal rosette leaves not known; climbing leaves with blade narrowly elliptic to rectangular, or slightly oblanceolate (8-)11-25(-28) cm by 1.1-3.1(-4.5) cm, apex acute, base distinctly attenuate for 4-5 cm, or narrowing slightly at the stem, decurrent as wings by up to 8.5 cm, rarely only slightly decurrent, clasping the stem for 1/2 its circumference. Longitudinal nerves 1 or 2 (or 3) on each side of the midrib, usually in the outer third, ascending from the midrib. Pennate nerves, ascending from the midrib, sometimes extending into longitudinal nerves, inconspicuous. Lower pitchers rarely collected, ellipsoid in the basal half, gradually becoming slightly constricted towards the subcylindrical upper half, up to 11 by 4 cm, 3 cm wide at the apex, with two fringed wings, the mouth ± ovate, oblique, peristome ± cylindrical in section, 0.5-1(-1.25) mm wide, without ribs, the inner edge with a row of minute, deeply sunken hollow glands, not dentate; lid ovate-shortly elliptic, up to 3.9 by 3.7 cm, apex rounded, base truncate, lower surface without appendages, nectar glands thickly to thinly bordered, fairly dense, evenly sized and spread, orbicular, 0.15-0.2(-0.3) mm diam.; spur simple, to 3 mm long. Upper pitchers as the lower but slightly ventricose, 9-19.5(-31) cm long, 3.2-4.8(-6.8) cm wide at the base, 1.8-3.4(-4.1) wide at the waist, 2-5.7(-6.2) cm wide at the mouth; with two ridges to 0.1 cm broad lacking fringing elements; the inner pitcher surface glaucous, usually with 2 (rarely 0, 1, or 3) conspicuous darker eye-like dots 1(-5) mm wide set symmetrically c. 1 cm apart on the dorsal wall of the pitcher more or less level with the front of the peristome; lid 2.1-5.2 (-7.8) by 2.1-4.7(-6.5) cm. Male inflorescence 20-38 cm long; peduncle 2.8-10 cm long, 3 mm diam. at base; partial peduncles 2-flowered, 0.2-1 cm long; bracts absent; pedicels 1-1.5 cm long; tepals ± elliptic 3.5-4 by 2.5 mm; androphore 0.25-0.3 mm long; anther head 0.7-1 by 1.5 mm. Fruits with valves 28-40 mm long. Seeds fusiform, 18-20 mm long, minutely tuberculate at the centre. Indumentum absent from the stem and leaves, rarely present on the pitcher just below the peristome; inflorescence covered, sometimes only sparsely, with appressed brownish hairs c. 0.2 mm long that extend from the rhachis to the lower surface of the tepals, the androphore and the ovary; fruit glabrous. Colour of pitcher light green, rarely suffused red or with red spots; flowers reddish black.A

Notes

Nepenthes reinwardtiana is unusual in the ‘eye-spots’, which contrast strongly against the back of the glaucous inner pitcher wall. In some populations there may be pitchers with one, three or no eye-spots (Phillipps & A.L. Lamb, Pitcher Plants of Borneo (1996) 135). Similar spots have been reported, but only as single pitchers on odd plants, in N. sanguinea, N. stenophylla, and N. tentaculata (Clarke in Nepenthes of Borneo (1997) 126 ). Nepenthes reinwardtiana is sometimes confused with N. gracilis, with which it shares sharply triangular stems and decurrent, sessile leaf bases. Nepenthes reinwardtiana can be distinguished by its leaves with 1-3 (vs. 4-6) pairs of longitudinal nerves, by the inner peristome which lacks teeth and has instead a prominent row of glandular pits. Furthermore, N. reinwardtiana has the base of the lid truncate and not cordate, and bears numerous small nectar glands (those of N. gracilis are few and large) and the partial peduncles are 2-flowered (vs. 1-flowered). Phillipps & A.L. Lamb Pitcher Plants of Borneo (1996) 135report that red pitchers seem to be found only on plants growing on ultrabasic, sandy heath or podsolic soils.
J.H. Adam & Wilcock base their variety samarindaiensis on specimens with rounded stems and non-decurrent leaf bases found in E Kalimantan. As indicated by J.H. Adam & Wilcock, Edinb. J. Bot. 50 (1993) 91, reports of this species in Peninsular Malaysia are based on the misidentification of specimens or misinterpretation of localities from collecting notes.A

Distribution (General)

Sumatra and Borneo.A

Habitat

Lowland peat-swamp forest or high altitude ridges (sandstone or limestone) or more rarely moss forest, occasionally on ultrabasic soils; 0-1450(-2100) m. Often growing epiphytically.A

Bibliography

A. Cheek, M. R. & Jebb, M. H. P. 2001: Flora Malesiana - Nepenthaceae, Series I, Volume 15. – Leiden: Nationaal Herbarium Nederland, Universiteit Leiden branch

Specimens

Country	Date	Collector + collecting number	Herbaria
Jumaat H.Adam JHA8016; Keningau-Kimanis Road, Taman Banjaran Crocker, 1400m, 30 Apr 2003. Holotype UKMB; isotype UKMB.
Citation: Jumaat H.Adam JHA8016; Keningau-Kimanis Road, Taman Banjaran Crocker, 1400m, 30 Apr 2003. Holotype UKMB; isotype UKMB.
		Junghuhn s.n.	U
Citation: Sumatra, Batak region, Simur-wasos, alt. 1350 m, Junghuhn s.n. (U sh. 00273) Specimen summary: U sh. 00273
	1840-09	Junghuhn s.n.	U
Citation: Sumatra, Batak region, Pager-utang, alt. 600 m, Sep 1840, Junghuhn s.n. (U sh. 00274) Specimen summary: U sh. 00274
	1952-08-03	Meijer 1047	BO, K, L
Citation: Borneo, E Kalimantan, Samarinda, S. Titan Complex, alt. 20 m, 3 Aug 1952, Meijer 1047 Specimen summary: BO Isotype of Nepenthes reinwardtiana var. samarindaiensis J.H.Adam & Wilcock Specimen summary: K Isotype of Nepenthes reinwardtiana var. samarindaiensis J.H.Adam & Wilcock Specimen summary: L Holotype of Nepenthes reinwardtiana var. samarindaiensis J.H.Adam & Wilcock