Nepenthes angasanensis | |
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Nepenthes angasanensis holotype (Salmon & Maulder 234372). | |
Conservation status | |
Scientific classification | |
Kingdom: | Plantae |
(unranked): | Angiosperms |
(unranked): | Eudicots |
(unranked): | Core eudicots |
Order: | Caryophyllales |
Family: | Nepenthaceae |
Genus: | Nepenthes |
Species: | N. angasanensis |
Binomial name | |
Nepenthes angasanensis Maulder, D.Schub., B.R.Salmon & B.Quinn (1999)[1] |
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Distribution of N. angasanensis. | |
Synonyms | |
Nepenthes angasanensis ( /nɨˈpɛnθiːz ˌæŋɡəsəˈnɛnsɪs/) is a highland Nepenthes pitcher plant species, native to Sumatra, where it grows at an altitude of 2200 to 2800 m. The status of this taxon is controversial as it is similar in morphology to N. mikei and N. tobaica.
The specific epithet refers to Mount Puncak Angasan, from which the type specimen was collected.[1] No forms or varieties of N. angasanensis have been described.
Contents |
Character | N. angasanensis | N. mikei | N. tobaica |
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Habit | Produces offshoots from underground rhizomes | No rhizomes | No rhizomes |
Spur | Forked | Fasciculate | Filiform |
Inner margin of peristome | Teeth to 1.5–2 mm long | Teeth to 0.2-0.4 mm long | Teeth < 0.2 mm |
Stem cross section | Cylindrical | Cylindrical | Cylindrical to obtusely triangular |
Bracteoles | Sometimes near base of lowest pedicel only | Half way up every pedicel | At base or slightly below pedicel attachment, few |
Pitcher glands | 300 / cm² | 150-180 / cm² | 200-250 / cm² |
Pedicels | 1-flowered | 1-flowered | 2-flowered |
Inflorescence (female) | 55–125 mm long, 9-17 flowers | 40–80 mm long, 4-10 flowers | 195–400 mm long, 30-50 flowers |
In 2001, Charles Clarke performed a cladistic analysis of the Nepenthes species of Sumatra and Peninsular Malaysia using 70 morphological characteristics of each taxon. The following is a portion of the resultant cladogram, showing part of "Clade 6". The sister pair of N. angasanensis and N. mikei has 79% support.[6]
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The following natural hybrids involving N. angasanensis have been recorded.
Incompletely diagnosed taxa: N. sp. Misool • N. sp. Papua • N. sp. Sulawesi
Possible extinct species: N. echinatus • N. echinosporus • N. major