I've been looking at Paul Christian's web site lately and here is what he says about I. u. 'Alberto Costillo': "Very attractive highly glaucous white-dusted foliage with large sideways- to up-facing fragrant blooms of pristine white. This is twice as large as the scrawny old clone 'album' which we have now discontinued. It is far more vigorous and makes much larger bulbs. The wide glaucous foliage is very characteristic even when the plant is not in flower. I mention this as some growers seem to think that it is the old scrawn-white with a new name, this is not the case, so check your sources carefully !" Perhaps the white Mary Sue has is the older 'album' clone. Cathy Craig San Clemente CA Zone 9b President: Pacific Bulb Society > > On the other hand, Muzza (from Australia) sent me some white ones several > years ago that he had lost the tag on so I don't know which cultivar they > are. They were not very robust so I doubt they are your namesake as many > people have spoken about what a great plant that one is.