Yes i think so too. I have an other one, which has grasgreen leaves, very different. Would be intresting to know, if they are from different locations or if this is natural spreading in the species, no matter of the location.Lovely P. tonsum and even if it was mislabeled a gain to every collection.
Saw just few week ago on Popow's ebay accout there are 'green leaved' and 'silver leaved' P. tonsum. Yours should be a 'silver leaved' one.