The genus Amorphophallus Blume ex Decne., consisting of about 205 species and distribute widely in the tropics from West Africa eastward into Polynesia (South EastAsia, the tropical zone of Asia, Africa and Australasia).
Amorphophallus in Thailand http://aroidsthailand.myspecies.info/taxonomy/term/27.
Pseudodracontium in Thailand (This genus is classified and moved into genus Amorphophallus) http://aroidsthailand.myspecies.info/taxonomy/term/95/literature
You can see taxonomic name and link of each species to the website http://www.aroid.org and http://apps.kew.org by clicking on my species photograph.
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