Nepenthes extincta

Nepenthes extincta

Synonymy

Nepenthes extincta Jebb & Cheek in Eur. J. Taxon. 69: 14 (-17, fig. 3). 2013 sec. Cheek & Jebb 2013
    • Type: PHILIPPINES. Mindanao Island “Red Hills (= 400 m alt.), SE of Claver, near the northeastern coast of the Mindanao Island. Boundary of the Surigao del Sur and Surigao del Norte” 8 Aug. 1978, Fumihiro Konta 12365 (holotype BISH).

Description

Terrestrial shrub, probably about 1 m tall. Leaves elliptic to elliptic-lanceolate, 13–17 × 5.5–8 cm, thickly leathery, glossy above, matt mid brown below; apex obtuse to acute, not peltate; base rounded to obtuse, not decurrent; longitudinal nerves arising from base of blade, where 5–6 pairs arise on each side of the midrib, at blade midpoint 4–5 pairs occur in the outer third of the blade; pennate nerves arising at ca. 45° from the midrib, irregularly branching, ends traversing the inner longitudinal nerves; all nerves most conspicuous on upper surface; midrib deeply depressed on upper surface, lacking hairs, highly exserted on lower surface and densely (80–90% cover) grey-white stellate hairy, the hairs gathering dirt, hairs sessile, arms 5–8, 0.25–0.5 mm diam., fine, acute, appressed to surface; lower surface of blade sparsely hairy, densest towards midrib, ca. 15% cover, decreasing at margin to 5–10%, cover, hairs mainly stellate, as midrib, mixed with sparser erect, bristle-like hairs 1–2 mm long, of several types (1) with short branches arising along the length of the main axis; (2) with 2–6 ± equal erect arms; (3) with a single long erect bristle arising from a stellate hair, the “dagger-hair” of Kurata (2003) more rarely (4) hairs with 2–3 erect, equal arms from the base; depressed-globose sessile red-black glands 0.03 mm diam., raised, dense, conspicuous; upper surface of blade with stellate hairs, as lower surface, scattered along the margins of the midrib. Petiole 4.5 × 0.5–0.7cm, appearing cylindric due to the two involute wings, indumentum of appressed, stellate, fine 5–8-armed hairs, ca. 20% cover. Lower and upper pitchers unknown, possibly not produced. Intermediate pitchers (tendrils not coiled, fringed wings absent) ovoid-cylindric, 18–24 × 5.9–8.2 cm, widest in the basal half, narrowing gradually to the cylindric upper half (4.8–5.5 cm wide), not constricted or waisted; outer surface 10–20% covered in minute, white, 2–4-armed, bushy-stellate hairs 0.12–0.15 mm wide and high, the arms stout and raised, 10–15 hairs per mm2, mixed with sparser black depressed-globose sessile glands 0.07 mm diam., 4–5 per mm2, long simple and bristle-like hairs absent; fringed wings absent, reduced to ridges; mouth ovate 7–8 × 4.5–5.5 cm, oblique, concave, column weakly defined ca. 1.5 × 0.7 cm; peristome subcylindric, 7–8 mm wide, widest at sides, outer edge lobed, lobes 1–3 per side, 10–12 mm wide, inner side inconspicuously toothed, teeth 0.25 mm long; ridges 4 per mm, 0.1 mm high. Lid ovate 5.2–6.5 × 4–5.2 cm, apex rounded, base truncate, lower surface with a basal ridge ca. 8 mm long, 1–2 mm high, bearing a pronounced straight convex appendage 4 × 2.5–5 mm; nectar glands of two distinct size classes (1) smaller, elliptic or orbicular, frequent, bordered glands 0.3–0.6(–0.7) × 0.25 mm, the border ca. 0.1 mm wide, glossy pale brown, dense, (1(–2) per mm2) along the midline these are longitudinally elliptic, elsewhere with their short axis orientated towards the base of the lid; the appendage completely covered in smaller type nectar glands; (2) larger glands elliptic to orbicular, (1–)1.25–2 × 1.25 mm, the lumina often invaginated by a projection of the border, border 0.2 mm thick, 4–15 on each side of the lid, scattered around the margin and towards the apex of the midline; sessile, depressed-globose, red glands, 0.05 mm in diam., 1–2 per mm2; marginal 0.5–1 mm of lower surface with minute branched hairs 0.1 × 0.1 mm; upper surface with indumentum as outer pitcher. Spur inserted 5–6 mm below junction of lid with peristome, cylindric 8–14 × 1–1.2 mm, apex shortly bifid, surface covered in minute appressed, matted, white-grey stellate hairs. Male and female inflorescences and infructescence unknown.A

Conservation

Assessed as Critically Endangered under Criterion D of IUCN (2012) since only a single individual has ever been recorded (the type specimen collected in 1978).A

Distribution (General)

Philippines, Mindanao, Surigao del Sur.A

Etymology

Nepenthes extincta is named to signify that this species may already be extinct globally.A

Habitat

Open scrub habitats on ultramafic substrate with N. merrilliana Macfarl. (Macfarlane 1911) and N. graciliflora Elmer (Elmer 1912). Elevation: ca. 400 m.A

Bibliography

A. Cheek, M.R. & Jebb, M.H.P. 2013: Recircumscription of the Nepenthes alata group (Caryophyllales: Nepenthaceae), in the Philippines, with four new species. – European Journal of Taxonomy 69

Specimens

CountryDateCollector + collecting numberHerbariaTypeScanDerivatives
PhilippinesKonta, F. 12365BISH
Citation: Philippines, F. Konta 12365.

Specimen summary: BISH
Type for: Nepenthes extincta Jebb & Cheek