| 1 | Leaf base distinctly petiolate |
| 1' | Leaf base tapering, decurrent or amplexicaul, at most sub-petiolate |
| 2 | Lid narrow; nectar glands 0-12 on lower surface |
| 2' | Lid elliptic; nectar glands 30-100+ |
| 3 | Lower leaf margins fimbriate |
| 3' | Lower leaf margins not fimbriate |
| 4 | Lid with many glands confined to edges |
| 4' | Lid with few, scattered, prominently rimmed glands |
| 5 | Leaf base decurrent to stem |
| 5' | Leaf base amplexicaul, but not decurrent |
| 6 | Peristome with a white collar below |
| 6' | Peristome without a white collar below |
| 7 | Stem angular, leaf base sessile; lid flat below with scattered large glands |
| 7' | Stem rounded, leaf base sub-petiolate; lid with a basal ridge with large glands |
| 8 | Lid rounded, cordate at base; peristome narrow, rounded, stem rounded |
| 8' | Lid ovate, truncate at base; peristome broader, irregular, stem angular |
| 9 | Pitcher spur branched; lid glands numerous, small (0.2-0.3 mm) |
| 9' | Pitcher spur simple; lid glands few, large (0.4-0.5 mm) |
| 10 | Stem sharply 3-angled; peristome scarcely toothed within; lid without hairs |
| 10' | Stem perceptibly 3-angled; peristome teeth large near lid; lid with hairs |
