“When not in flower, H. paradisea can be confused with many other New Guinean species with similar plain green, coriaceous leaves, for example H. apoda S.Moore, H. evelinae Simonsson & Rodda, H. leucantha S.Moore, H. oreostemma Schltr., and H. solaniflora Schltr. Their flowers show a great diversity in both size, shape, color and orientation, but none of them have corolla lobes with 3 mm long hairs.”