Taxonomy
Nepenthes macrovulgaris is most closely related to N. hirsuta and N. hispida, and may be difficult to distinguish from them. Botanists Matthew Jebb and Martin Cheek suggest that N. macrovulgaris is also related to N. philippinensis, a species endemic to Palawan in the Philippines.
| N. macrovulgaris | N. hirsuta | N. hispida |
|---|---|---|
| leaves charteous ≤30 cm, oblong to linear | leaves coriaceous ≤20 cm, canaliculate-spathulate or obovate | leaves coriaceous sessile ≤28 cm, oblanceolate-oblongate |
| apex acute to obtuse | apex acute or roundish | apex acuminate-obtuse, often unequal |
| base attenuate into a winged petiole, wings wider towards the base, clasping stem for about ½ its diameter, not decurrent | base attenuate, forming laterally flattened, semi-amplexicaul sheath | base attenuate, amplexicaul and often decurrent onto the internode |
| longitudinal veins: 2-3 on each side | longitudinal veins not prominent | longitudinal veins: 3 on each side |
| adult pitchers and stem glabrous, young pitchers with short, thin hairs | stem densely covered with long brown hairs, not as bristle-like as those of N. hispida | stem very densely covered with bristle-like purple-grey hairs |
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