Nepenthes armin

Nepenthes armin

Synonymy

Nepenthes armin Jebb & Cheek in Blumea 59: 147, fig. 1. 2014 sec. Cheek & Jebb 2014
    • Type (designated by Cheek, M.R. & Jebb, M.H.P. 20141): Type: Argent & Reynoso 8936 (holotype K; isotypes E, PNH n.v.), Philippines, Sibuyan Island, above Magdi- wang on ridge to Mayos Peak, 750 m, male infl. 16 Aug. 1989.
  • 1. Cheek, M.R. & Jebb, M.H.P. 2014: Expansion of the Nepenthes alata group Nepenthaceae), Philippines, and descriptions of three new species. – Blumea 59: 144-154

Description

Terrestrial climber 5 m tall. Rosette and short stems unknown. Climbing stem rounded-quadrangular (3–)4–5(–5.5) mm diam; internodes (1.2–)1.8–4.2(–4.9) cm long; axillary buds not seen; indumentum absent apart from dense brown simple hairs in the leaf axils, otherwise only with sessile depressed-globose glands 0.04 mm diam throughout. Leaves thinly coriaceous, petiolate narrowly oblong-elliptic to narrowly elliptic-linear, (10–)13.1–15(–17.5) by (1.4–)1.8–2.6(–3.7) cm; apex acute or obtuse-rounded; base gradually decurrent to the petiole; nerves visible on the upper, not the lower, surface; longitudinal nerves 2 pairs, in the outer third of the leaf, the innermost pair arising from the midrib 1/2–1/3 the length of the blade from the petiole; pennate nerves numerous, patent, irregular; indumentum absent except for simple hairs along the upper surface of the midrib, hairs (0.1–)0.4–0.6 mm long, erect, pale brown, covering (5–)20–40 % of the surface, densest in the distal half of the blade, otherwise with sessile glands as the stem, 10–12 glands per mm2. Petiole (4.2–)4.7–5.6(–7) by (0.2–)0.3–0.4(–0.6) cm, wings patent in life (revolute in herbarium specimens), base clasping the stem by 1/2 its circumference, not decurrent, indumentum absent apart from sessile glands, and with very sparse and inconspicuous simple hairs along the abaxial midrib. Lower and intermediate pitchers unknown. Upper pitchers (coiled tendril) green, with faint purple mottling, narrowly cylindrical in outline, 10.2–12.9(–16) by 1.9–2.6(–3.2) cm, the lower half narrowly ellipsoid, gradually constricted to 1.3–1.8(–2.2) cm wide at the midpoint, then widening gradually to (1.7–)2.2–2.8(–3.2) cm wide below the peristome; fringed wings absent, reduced to inconspicuous ridges c. 1 mm wide extending from base to apex; indumentum of minutely branched hairs 0.1–1 mm long, 16–20 per mm2, the smallest hairs with 2–3 branches at the base, the longer hairs with 1–2 short branches along their length, mixed with sessile depressed-globose glands 10–12 per mm2. Mouth broadly ovate, 1.8–2.5(–3.8) by 1.8–2.3(–2.4) cm, oblique, slightly concave, column not well-developed; peristome cylindric, 1–2 mm diam, ± even in width along its length, ribs 0.25 mm apart, raised 0.04–0.08 mm, inner edge inrolled, teeth and holes visible only when dissected, outer edge often with 2–3 shallow lobes; inner surface of pitcher glaucous green with scattered purple mottling. Lid orbicular, (1.8–)2.3–2.7 by (1.8–)2.1–2.6(–3.3) cm, apex rounded, or rarely emarginate, base cordate, sinus 3–4 mm deep, 10 mm wide; lower surface brightly mottled purplish red, basal ridge c. 1 mm high 3 mm in length, convex basal appendage absent; nectar glands evenly and densely spread across the lid and ridge surface, (4–)6–8(–10) per mm2, monomorphic, directed to lid base (rims are asymmetric, being highest towards lid apex ), orbicular, 0.2 mm diam, with membranous walls projecting vertically, 0.07 mm tall; mixed with sessile depressed-globose glands 0.04 mm diam at the edge of the lid, which are otherwise absent from the larger, central part of the surface. Spur recurved, simple, 3.5–5 mm long, tapering to an acute apex, base completely covered in appressed hairs 0.2–0.3 mm long, simple, copper-coloured, distal three-quarters 50 % covered in hairs. Male inflorescence 25–28 by 1.2–1.5 cm, indumentum of appressed, simple, copper-coloured hairs 0.3–0.4 mm long covering 40–50 % of the surface, mixed with sessile depressed-globose glands as the stem; peduncle 7–11 by 0.1–0.2 cm; rhachis 17–18 cm long, with 70–95, 1-flowered partial-peduncles; bracts absent; partialpeduncles/ pedicels 3.5–4.5 mm long, indumentum covering 80–100 % of the surface; tepals 4, green at anthesis, turning red with age, 2.4 by 1.2–1.6 mm, outer surface completely covered in appressed, simple, copper-coloured hairs 0.2 mm long, papillae absent or inconspicuous, inner surface densely covered in elliptic nectar glands; staminal column 1–1.7 mm long, glabrous; anther-head subglobose, 0.45–0.9 by 1.2 mm. Female inflorescence as the male, but c. 30 by 1.2 cm; peduncle c. 16 cm long; rhachis c. 14.5 cm (immature), partial-peduncles/ pedicels c. 110, 3.5–6 mm long, tepals narrowly oblong 2.8 by` 1.2 mm, outer surface densely papillate with hairs sparse, scattered; ovary ellipsoid, 4-lobed, 2.2–3 by 1.1–1.4 mm completely covered in hairs as the pedicels; stigmas glossy black, 4-lobed, 1.25 mm diam. Infructescence and seeds unknown. Data on colour and posture when live in this description is taken from the field notes of the specimens cited. A

Notes

Nomenclatural citation according to IPNI (accessed 15 March 2017): Jebb & Cheek in Blumea preprint: 7. 2014 [4 Nov 2014].B

Conservation

Nepenthes armin is here assessed as Critically Endangered under criterion D (< 50 mature individuals) of the categories and criteria of IUCN (2012).A

Distribution (General)

Philippines, Sibuyan IslandA

Etymology

Named after Armin Rios Marin, Municipal Councilor on Sibu-yan and former World Wildlife Fund official who, on 3 October 2007, was shot and killed by a mining company official while leading a protest of his community against the clearance of forest trees to facilitate mining (Goodland & Wickes 2008: 175); [http://www.piplinks.org/system/files/Mining+or+ Food+Case+Study+6.pdf].A

Bibliography

A. Cheek, M.R. & Jebb, M.H.P. 2014: Expansion of the Nepenthes alata group Nepenthaceae), Philippines, and descriptions of three new species. – Blumea 59: 144-154
B. IPNI 1999+: Name Records

Specimens

CountryDateCollector + collecting numberHerbariaTypeScanDerivatives
Type: Argent & Reynoso 8936 (holotype K; isotypes E, PNH n.v.), Philippines, Sibuyan Island, above Magdi- wang on ridge to Mayos Peak, 750 m, male infl. 16 Aug. 1989.
Citation: No Citation available. This specimen either has no or multiple field units.