i looked at sodiroi on the above links and it looks like mamei to me :). i see other links showing it as a solid green-grey.
look at this one
http://www.aroid.org/genera/se...
and here it says that sodiroi is a syn for Ph. ornatum and also shows a plain green leaf
http://www.htbg.com/Araceae/PH...
and here too
http://www.aroidpictures.fr/GE...
Ph. mamei below looks very silvery, similar to 'mine'.
http://www.aroidpictures.fr/GE...
and i took a good pic finally of the wavy petioles ;).
