Nepenthes section Tentaculatae

Cheek, M. & Jebb, M., 2016, A new section in Nepenthes (Nepenthaceae) and a new species from Sulawesi, Blumea 61 (1), pp. 59-62 : 60

Key to the species of Nepenthes section Tentaculatae

1. Leaves of climbing stems tapering gradually to the base, clasping the stem by 1/2 its circumference........... 2

1. Leaves of climbing stems not tapering to the base, more or less perfoliate (clasping the stem for the entire circumference) and/or adnate............................ 3

2. Upper pitchers with wings reduced to inconspicuous ridges. — Borneo............................ N. muluensis

2. Upper pitchers with wings fully developed but not fringed, or with fringed elements inconspicuous. — Sulawesi ......................................... N. glabrata

3. Leaves of climbing stems not adnate but subperfoliate, pitchers strongly infundibuliform, mouth circular....... 4

3. Leaves of climbing stems perfoliate-adnate, pitchers ovoidcylindric or cylindric, mouth rhombic................ 5

4. Stem densely pubescent, climbing stem leaf apex rounded, with tendril peltate................... N. undulatifolia

4. Stem glabrous, climbing stem leaf apex obtuse to acute, tendril apical.......................... N. pitopangii

5. Peristome of upper pitchers with ridges like curved blades 1–several mm high, widely spaced, 1–6 mm apart. — Sulawesi ......................................... 6

5. Peristome of upper pitchers with ridges well defined or not, but not like blades, <0.5 mm high, not spaced apart but ± contiguous with each other. — Sulawesi and Borneo. 7

6. Stems densely and persistently patent hairy; lower surface of the lid hairy.......................... N. maryae

6. Stems glabrous; lower surface of lid glabrous.. N. hamata

7. Stems hairy; pitchers usually 12–25 by 2–5 cm. — Borneo, Mt Murud.......................... N. murudensis

7. Stems glabrous;pitchers usually 6.5–12(–14) by 1.5–3(–3.5) cm. — Borneo and Sulawesi ...................... 8

8. In dried specimens, peristome ridges well defined, c. 0.5 mm high; leaf blades of climbing stems to 22 by 4.5 cm ............................................ N. nigra

8. In dried specimens, peristome ridges inconspicuous; leaf blades of climbing stems 6–9 by 1.8–2.5 cm ............................................. N. tentaculata