Nepenthes jacquelineae

Nepenthes jacquelineae

Synonymy

Nepenthes jacquelineae C.Clarke, Troy Davis & Tamin, Nepenthes Sumatra Penins. Malaysia: 146. 2001 sec. Clarke 2001
    • Holotype (designated by Clarke, C.M. 20011): Clarke, Davis & Tamin 1307 (holo, ANDA), Sumatra, Sumatra Barat, Bukit Barisan, north of Bukittinggi, 1700 m, 13 July 2000.
  • 1. Clarke, C.M. 2001: Nepenthes of Sumatra and Peninsular Malaysia

Description

Stem: climbing, ≤ 5 m in length, ≤ 0.5 cm in diameter, internodes ≤ 10 cm long, cylindrical-angular.
Leaves of rosettes: coriaceous, sessile to sub-petiolate; lamina ovate-spathulate, ≤ 7 cm long, ≤ 3.5 cm wide, apex obtuse. Lamina contracted towards the base, which is simple, clasps the stem for 2/3 of its diameter and is not decurrent. Tendrils straight, ≤ 15 cm long. Longitudinal veins 3 on each side of the midrib, pennate veins arising obliquely from the midrib.
Leaves of the climbing stems: similar in shape to those of the rosettes, but larger, ≤ 20 cm long, ≤ 6 cm wide overall, with the contracted portion at the base ≤ 5 cm long. Appex acute to obtuse, longitudinal and pennate veins as in the rosette leaves. Tendrils ≤ 30 cm long, with a curl in the middle.
Rosettes and lower pitchers: arising abruptly from the tendril, which is usually inserted at the side of the pitcher, ≤ 6 cm high, ≤ 4 cm wide, infundibular throughout, not hipped, mouth horizontal. Inner surfaces glandular throughout, glands 0.3 mm wide, ovate, slightly raised or hooded, approximately 250 per sq. cm. Two wings, bearing multi-cellular fringe elements, may or may not be present on the front. If present, they are ≤ 3 mm wide and ≤ 1 cm long, extending down from the edge of the mouth. Multi-cellular fringe elements, if present, are ≤ 3 mm long. Peristome flattened and expanded, ≤ 1.0 cm wide (except at the front, where it is contracted to 1/2-2/3 of the width of the other parts), joined to the pitcher in the middle, the inner side incurved slightly, the outer side horizontal or inclined at an angle of approximately 45°. Ribs virtually indistinguishable, except at the front, where they are distinct but not significantly raised. Outer margin slightly, but very tightly, recurved. Inner margin almost entire, except at the front, where short distinct teeth, ≤ 0.5 mm long are present. Lid ovate, ≤ 1 cm long, ≤ 0.8 cm wide, covering the mouth, contracted at the base, not cordate. Small, circular nectar glands (≤ 0.5 mm diameter) are concentrated towards the apex, near the midrib on the lower surface. A few very large, raised nectar glands (≤ 1.0 mm diameter) are also present on the lower surface of the lid, but are not concentrated in any particular area. Spur simple, flattened, ≤ 5 mm long, ≤ 1.5 mm wide.
Upper pitchers: arising gradually from the hanging end of the tendril, expanding very slightly throughout the curl, narrowly infundibular in the lower 1/4-1/3, widely infundibular throughout the upper 2/3-3/4, not hipped, mouth horizontal, ≤ 15 cm high, ≤ 10 cm wide. Inner surface glandular throughout, glands as in the rosette pitchers. Wings reduced to two simple ribs, never bearing multicellular fringe elements. Peristome flattened and expanded, ≤ 3.5 cm wide (except at the front, where it is contracted to 1/2-2/3 of the width of the other parts), joined to the pitcher in the middle, the inner side incurved slightly, the outer side horizontal. Ribs virtually indistinguishable, except at the front, where they are distinct but not significantly raised. Outer margin often undulating, and always slightly, but very tightly, recurved. Inner margin bearing short, distinct teeth, ≤ 0.5 mm long. Lid narrowly ovate, ≤ 5 cm long, ≤ 2 cm wide, positioned over the mouth, where it covers much of the orifice, contracted towards the base, not cordate. Small, circular nectar glands (≤ 0.5 mm diameter) are concentrated towards the apex, near the midrib on the lower surface. A few very large, raised nectar glands (≤ 1.5 mm diameter) are also present on the lower surface of the lid, but are not concentrated in any particular area. These glands are so large that they produce swellings on the upper surface of the lid. Spur simple, flattened, ≤ 1 cm long, ≤ 2 mm wide.
Male inflorescence: a raceme; peduncle ≤ 12 cm long, rachis ≤ 20 cm, bearing one- or two-flowered partial peduncles. The two-flowered partial peduncles occur on the lower 2/3 of the rachis, whereas the one-flowered ones occur towards the apex. All partial peduncles bear a long, filiform bract (≤ 1.5 cm long), which arises from the rachis, but is also joined to the base of the partial peduncle. Each two-flowered partial peduncle is ≤ 1.0 cm long below the branch, with each branch ≤ 0.8 cm long. Sepals ovate-lanceolate, ≤ 0.7 mm long, ≤ 0.4 cm wide. Column ≤ 0.4 cm long. Approximately 100 flowers are borne on each inflorescence.
Female inflorescence: similar in structure to the male; peduncles ≤ 20 cm long, rachis ≤ 10 cm. Mature fruits ≤ 2.5 cm long, approximately 60 flowers are borne on each inflorescence.
Indumentum: stem and leaves glabrous throughout, Outer surfaces of the pitcher and upper surfaces of the lid sparsely covered with short, white stellate hairs. Upper pitchers generally having fewer persistent hairs than the lower ones. Underside of peristome on outer surface with a dense covering of these hairs. Spur covered with simple, red-brown, downy hairs. Developing pitcher buds densely covered with soft, simple, downy red-brown hairs, but most of these are caducous, except on the spur. Peduncle and rachis glabrous or sparsely covered with short, brown, stellate hairs. Partial peduncles more densely covered with the same hairs, while the base of the column is very densely covered. The indumentum of the female inflorescence is generally a little denser throughout than that of the male.A

Distribution (General)

Malaysia, Sumatra Barat, Bukit Barisan Mountains.B

Etymology

For Jacqueline Clarke, wife of the first author, Charles Clarke.C

Habitat

Epiphytic or terrestrial in mossy forest, 1700-2200 m a.s.l.A

Bibliography

A. Clarke, C.M. 2001: Nepenthes of Sumatra and Peninsular Malaysia
B. McPherson, S. R. 2011: New Nepenthes 1
C. McPherson, S. R. 2009: Pitcher Plants of the Old World 2

Specimens

CountryDateCollector + collecting numberHerbariaTypeScanDerivatives
Clarke, Davis & Tamin 1307 (holo, ANDA), Sumatra, Sumatra Barat, Bukit Barisan, north of Bukittinggi, 1700 m, 13 July 2000.
Citation: No Citation available. This specimen either has no or multiple field units.