I was very glad to see this supposedly uncommon climbing palm on a short trip to Cape Tribulation. Despite it’s uncommonness, it can easily be distinguished by the cirri that extend from the ends of the pinnate leaf. None of the other lawyer vines in the rainforest of the wet tropics world heritage area have such a feature. Some palms (C. aruensis and C. warbugii) from further up north in Cape York also have this feature. This palm was previously called C. hollrungii. This species is also sometimes included under Calamus aruensis.
Leaf Whispering in the Tropics 