Nepenthes Tobaica - Related Species

Related Species

An upper pitcher of N. gracilis (left) and N. reinwardtiana (right)
Differences between N. angasanensis, N. mikei and N. tobaica (Salmon & Maulder, 1999)
Character N. angasanensis N. mikei N. tobaica
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.


unnamed

N. gracilis



N. reinwardtiana



unnamed


N. tobaica


79%

N. angasanensis



N. mikei






The pitchers of N. tobaica are similar to those of N. adnata, although the stem and lamina are quite different.


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