Two major variants of H. pulchella are known: the type variety, which bears conspicuous retentive hairs on the inner pitcher surface, and an
incompletely diagnosed taxon from
Amurí Tepui, which lacks these hairs.[2]
Nogué, S., V. Rull, E. Montoya, O. Huber & T. Vegas-Vilarrúbia (October 2009). Paleoecology of the Guayana Highlands (northern South America): Holocene pollen record from the Eruoda-tepui, in the Chimantá massif. Palaeogeography, Palaeoclimatology, Palaeoecology281(1–2): 165–173.
doi:
10.1016/j.palaeo.2009.07.019
Rull, V. (2009).
"Pantepui"(PDF). In: R.G. Gillespie & D.A. Clague (eds.) Encyclopedia of Islands. University of California Press, Berkeley. pp. 717–720.