brid , I should not rely on ,my memory .. just pulled out Alistairs book , Aroids of PNG , to check how many spp. got lumped together ,, and what did I find ??
Alocasia aequiloba is the name of the spotted one , and all of these are lumped in with it now .
Also the other species of Alocasia you asked me about might be A.flabellifera , its very closely related to macrorrhizos ,
differing in the very broad leaves and only a few of them, and the prominent secondary venation .I will attempt to copy the illustration from the book .
Michael Pascall