Nepenthes boschiana

Primary tabs

Nepenthes boschiana

Description

Terrestrial shrub or climber to c. 5 m tall. Leaves chartaceous, petiolate, those of short stems oblong, 18-19(-28) by 10 cm, apex broadly acute, not peltate, base abruptly attenuate; Inflorescences incompletely known, rhachis with 2-flowered partial peduncles at base, 1-flowered above. Fruit with valves 25 by 2.5 mm. Seed filiform, 24 by 0.5 mm.

Distribution

Asia-Tropical: Borneo present (Kalimantan present), G. Besar present, G. Sakoembang present, G. Sarempaka present, Meratus Mt Range present
Borneo: S Kalimantan (Meratus Mt Range: G. Sakoembang, G. Sarempaka, G. Besar).

Ecology

.

Taxonomy

1 On the evidence of Ch. Clarke (pers. comm. and ) and of specimens that we have seen since our skeletal revision (), we here unite N. borneensis J.H. Adam & Wilcock with N. boschiana, which we previously maintained as distinct species (op. cit.). Clarke reports that at the type locality of N. borneensis (G. Besar), he has seen in one population plants with the pitcher, peristome and lid appendage characteristics of N. borneensis, other plants with the characteristics of N. boschiana, and intermediates between both. The previously overlooked De Vogel 1934, from a third locality in the same mountain range, is also intermediate in several characters between N. borneensis and N. boschiana. Nepenthes boschiana is a polymorphic species and still poorly known: more study is needed to evaluate its variability and habitat. 3. Danser in reinstated N. boschiana in the sense we use it here, after the name had been applied differently by earlier authors. Miquel included within N. boschiana what we now accept as N. sumatrana Beck, whilst Beccari included N. boschiana within his concept of N. maxima Nees. Both Hooker and Macfarlane included N. stenophylla Mast. within N. boschiana. 2. Nepenthes boschiana seems closely related to N. stenophylla and N. faizaliana of Sarawak, but differs in always having arcuate stem wings (if present at all in the latter species they are straight), a less pronounced basal lid appendage (in the latter species it is 3-5 mm long), in the glabrous androphore (pubescent in the latter two species), in the sparse indumentum of white, simple hairs 0.2 mm long on the stem (in the latter the stem indumentum is dense, covering the surface of the stem, and usually brown and longer than 0.2 mm). Neither N. stenophylla nor N. faizaliana ever have a peristome as broad or as undulating as seen in the type collection of N. boschiana, nor a pitcher with a ventricose basal 1/4-1/3 and a narrowly cylindrical upper part. However, it seems that these characters are just an extreme variant of N. boschiana and not characteristic of that species. Nepenthes boschiana shares with N. faizaliana the affinity for limestone (as Ch. Clarke first pointed out (), and also infructescences/inflorescences reaching over 90 cm long.

Citation

Jebb & Cheek 1997 – In: Blumea: 27
Danser 1928 – In: Bull. Jard. Bot. Buitenzorg: 275
Nees: Becc. 1886 – In: Malesia: 3 & 9 p.p.
Clarke 1997: Nepenthes of Borneo: 71: f. 45 & 46
Jebb & Cheek 1997 – In: Blumea: 26