Nepenthes neoguineensis

Nepenthes neoguineensis

Synonymy

Nepenthes neoguineensis Macfarl. in Nova Guinea 8: 340, t. 67. 1910, sec. Cheek & Jebb 2001
    • Unknown type category: New Guinea, Lorentz River, Sabang, 25 Sep 1907, Versteeg 1746 (BO).
    • Unknown type category: New Guinea, Lorentz River, Sabang, 25 Sep 1907, Versteeg 1746 (K).

Other sources

Jebb, M.H.P. & Cheek, M.R. 1997: A skeletal revision of Nepenthes. – Blumea 42(1): 1-106: 68
Danser, B.H. 1928: – Bull. Jard. Bot. Buitenzorg, sér. 3, 9: 341
Jebb, M.H.P. 1991: An account of Nepenthes in New Guinea. – Science in New Guinea 17: 7-54: 36, f. 19

Description

Terrestrial climber to 10 m or more tall. Climbing stems 4-angular below internodes, rarely with 4 prominent wings, otherwise rounded, 0.3-0.6 cm diam., internodes 1-4 cm long; short stems and rosettes unknown. Leaves chartaceous, petiolate, leaf blades of climbing stems narrowly oblanceolate, 15-35 by 2.5-5(-8) cm, apex acute, base abruptly tapering to winged petiole, petiole 2-7 cm long, clasping the stem for 1/2 its circumference and decurrent down the stem with wings to 4 mm in breadth, 1-10 mm long. Longitudinal nerves 3 or 4 on each side of the midrib running in outer 1/3 of lamina, inconspicuous. Pennate nerves numerous, ascending obliquely and then curving towards the margin; irregularly reticulate in the outer 1/2 of the lamina. Lower pitchers ovoid, becoming cylindrical towards the mouth, but narrowest there, 14 by 4.5 cm, with prominent fringed wings to 10 mm broad, fringe elements to 3 mm long; mouth ovate, acuminate, oblique, straight; peristome flattened, to 8 mm broad, sloping inwards. Upper pitchers subcylindrical and curved over most of their length, gradually originating from the tendril, infundibulate in the lower part, becoming swollen at 2/5 its length, then slightly narrowed and barely widened again towards the mouth, to 24 by 5 cm, the fringed wings throughout the basal curve, often reaching close to the tendril, 5-8(-20) mm wide, fringed elements 3 mm long, 2-5 mm apart; mouth as in lower pitcher; peristome cylindrical or flattened, 1-3 mm broad, ribs 0.25-0.3 mm apart, outer edge entire, inner inconspicuously toothed; lid suborbicular, to 6 cm diam., apex truncate to emarginate, base rounded or cordate; lower surface lacking appendages, nectar glands orbicular, bordered, 0.2-0.3 mm diam., densest and largest about the 2 more prominent lateral veins; spur simple, dorsiventrally flattened, 2-5 mm long. Male inflorescence 35-50 cm long; peduncle 4-12 cm long, 2.5-4 mm diam. at the base; partial peduncles corymbose, (2-)4- or 5-flowered at base, to 5 cm long; bracts present or absent; tepals orbicular-elliptic, 4 mm long; androphore c. 3 mm long. Fruit and seed unknown. Indumentum very sparse, stems glabrous or, in the axils, brown-tomentose; leaves ciliate at the margin with sparingly branched, red-brown hairs 0.5 mm long or shortly hairy on the midrib when young, otherwise glabrous; pitchers densely stellately hairy when young, glabrescent except for a tomentose band below the peristome; lid as the pitcher; spur densely stellately hairy; inflorescence with short, brown or white stellate hairs, densely tomentose on pedicels, tepals and ovary, sparser on peduncle and rhachis, hairs 0.2-0.5 mm long, appressed. Colour of pitchers green.A

Notes

The curved, upper pitchers with broad, fringed wings which are widest at the base of the pitcher, and the corymbose partial peduncles are diagnostic of N. neoguineensis.
The type number has rather poorly developed inflorescences in which the partial peduncles are mostly 2-flowered, and 3-flowered near the base. The bract on the female partial peduncles is not always well developed. The upper pitchers may be strongly infundibulate (i.e. Cycloops Mts near Jayapura), approaching in appearance those of the closely allied N. paniculata. This latter species may be distinguished by its wholly infundibuliform upper pitchers (which are neither narrowed nor cylindrical towards the mouth) and the much reduced wings.
We are not certain that we have seen all the duplicates examined by the author of N. neoguineensis, since the sheets at Bogor and Kew do not appear to have been used in the production of the protologue plate.A

Distribution (General)

New Guinea mainland and d’Entrecasteaux archipelagoA

Habitat

River edge and river gravel bars, ridge crests, rarely open grassland or disturbed forest; sea level to 900(-1400) m.A

Bibliography

A. Cheek, M.R. & Jebb, M.H.P. 2001: Flora Malesiana - Nepenthaceae, Series I, Volume 15

Specimens

CountryDateCollector + collecting numberHerbariaTypeScanDerivatives
1907-09-25Versteeg 1746BO, K
Citation: New Guinea, Lorentz River, Sabang, 25 Sep 1907, Versteeg 1746.

Specimen summary: BO
Unknown type category of Nepenthes neoguineensis Macfarl.

Specimen summary: K
Unknown type category of Nepenthes neoguineensis Macfarl.