Nepenthes samar

Nepenthes samar

Synonymy

Nepenthes samar Jebb & Cheek in Blumea 58(1): 82 (-84, fig. 1). 2013 sec. Cheek & Jebb 2013
    • Type (designated by Cheek, M.R. & Jebb, M.H.P. 20131): Gaerlan & Chavez in PPI 26416 (holo BRIT; iso PNH n.v.), Philippines, Visayas, Luzon, Samar (exact locality withheld for conservation reasons), infructescence 21 Aug. 1996.
  • 1. Cheek, M.R. & Jebb, M.H.P. 2013: Nepenthes samar (Nepenthaceae), a new species from Samar, Philippines. – Blumea 58(1): 82-84

Description

Terrestrial shrub-climber, probably to several metres high, stems quadrangular, not winged, 5 –7(– 9) mm diam, internodes of climbing stems (2.5 –)3 – 8 cm long, axillary buds not seen, indumentum of red, flattened glands 0.05 mm diam, very young growth with thinly scattered simple appressed hairs 0.5 mm long, soon glabrescent, surface matt, green. Leaves of rosette and short stems not known, leaves of climbing stems spirally inserted, papery, matt, linear-oblong 22 – 32 by 2.8 – 3.2 cm, apex attenuate, not peltate, base steadily attenuate in the proximal 5 cm, subpetiolate, the base 0.6 – 0.8 cm broad, clasping the stem for 1/3 its circumference and decurrent as a wing 0.8 –1 by 0.1– 0.3 cm, continuing down the stem as a ridge, longitudinal nerves 5 – 6 pairs, evenly distributed, conspicuous on upper surface; pennate nerves numerous, arising at 45° from the midrib, branching, conspicuous, upper surface glabrous, lower surface with indumentum as the stem. Lower and inter­ mediate pitchers not seen. Upper pitchers (tendrils coiled), cylindric or narrowly infundibuliform, 12 – 25 by 4 – 6(– 8) cm; outer surface with minute red globose glands 0.05 mm, c. 10 per mm2 and sparse appressed simple hairs 0.2 – 0.9 mm long; minute, short-armed dendritic erect hairs 0.1 mm long below the peristome; green, spotted red, with peristome red. Fringed wings absent, reduced to ridges running the length of the pitcher. Mouth ovate, oblique, concave, 4 – 8 by 6 cm, peri- stome rounded, 6 –14 mm wide, 0.8 –1.4 ridges per mm, ridges 0.1– 0.25 mm high, inner edge not revolute, but directed to base of pitcher, teeth minute, alternating with holes, plainly visible, teeth broader than long, 0.12 – 0.4 by 0.25 – 0.5 mm; outer edge shallowly lobed, or not; column not strongly developed; lid broadly elliptic, (3 –)6 –7 by 4.7– 6.5 cm, apex rounded to truncate, base rounded or shortly and abruptly cordate; lower surface lacking basal appendage, with a shallow midline ridge 3 – 4 mm wide, c. 1 mm high; nectar glands sunken, sparse, transversely elliptic or orbicular, 0.25 – 0.4 by 0.25 –0.7(– 0.9) mm, borders thin, slightly raised, or absent, 40 – 50 glands on each side of the midline, mainly absent from the central c. 8 mm band; minute red glands flush with surface, 0.05 – 0.07 mm diam, evenly scattered, dense, 5 –10 mm per mm2; upper surface of lid with indumentum as outer pitcher. Spur cylindric,c. 10 mm, apex acute, hirsute. Male and female inflorescence unknown. Infructescence (with persistent sepals) with peduncle 17 cm long, 5 mm diam indumentum at base covering 30 – 40 % of surface; simple hairs, 0.15 – 0.25 mm long, glossy, copper-coloured, mixed with minute red glands 0.05 mm diam; rhachis 29 cm long, bearing c. 100 partial-peduncles, 2-flowered (mainly at base of inflorescence) to 1-flowered (mainly at apex of inflorescence) partial-peduncles in ratio of 1 : 2; partial-peduncles (when 2-flowered) 7– 9 mm long; bracts absent; pedicel 7–10 mm long, indumentum 80 – 90 % cover. Tepals 4, oblong, 2 – 3.5 by 1–1.7 mm, apex obtuse, lower surface glabrous apart from papillae, margin with short multicellular hairs, upper surface with nectar glands, glabrous. Fruit 25 – 28 mm long, glossy brown, dehiscing in 4 valves c. 3 mm wide, indumentum as pedicels but very sparse (2 %). Seeds 12 by 0.35 mm, minutely papillate, embryonic area central, 1.75 by 0.35 mm, with two or more tuberculate lines, pale brown.A

Conservation

Nepenthes samar is assessed as Critically Endangered under IUCN (2001), Criterion D. A

Distribution (General)

Philippines, Visayas, SamarA

Etymology

Named as a noun in apposition for the island of Samar.A

Habitat

Lowland Dipterocarp forest over ultramafics; low elevation.A

Bibliography

A. Cheek, M.R. & Jebb, M.H.P. 2013: Nepenthes samar (Nepenthaceae), a new species from Samar, Philippines. – Blumea 58(1): 82-84

Specimens

CountryDateCollector + collecting numberHerbariaTypeScanDerivatives
Gaerlan & Chavez in PPI 26416 (holo BRIT; iso PNH n.v.), Philippines, Visayas, Luzon, Samar (exact locality withheld for conservation reasons), infructescence 21 Aug. 1996.
Citation: No Citation available. This specimen either has no or multiple field units.