Nepenthes dubia

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Nepenthes dubia
Upper pitcher of Nepenthes dubia. Mount Talakmau, Sumatra.
Upper pitcher of Nepenthes dubia. Mount Talakmau, Sumatra.
Conservation status
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta
Class: Magnoliopsida
Order: Caryophyllales
Family: Nepenthaceae
Genus: Nepenthes
Species: N. dubia
Binomial name
Nepenthes dubia
Danser (1928)
Synonyms
  • Nepenthes bongso auct. non (Korth.) Tamin & M. Hotta, 1986

Distribution of N. dubia.

Nepenthes dubia (Latin: dubius = doubtful) is a highland Nepenthes pitcher plant species, native to Sumatra. It is closely related to N. inermis, but does not completely lack a peristome in the upper pitchers as in the latter.

Morphological differences between N. bongso, N. dubia, N. talangensis and N. tenuis (Nerz & Wistuba, 1994)
Character N. bongso N. dubia N. talangensis N. tenuis
Shape of upper pitchers tubulate - infundibulate tubulous in the lower part, infundibulate above the middle tubulous to narrow infundibuliform in the lower half, ovate in the upper half wide infundibulate, contracted below the mouth
Lid orbiculate narrow cuneate broad-ovate very narrow elliptical
Length/width ratio of upper pitchers 3,3 1,9 2,3 1,75
Nepenthes dubia holotype (Bünnemeijer 938).
Nepenthes dubia holotype (Bünnemeijer 938).

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