Hi Robert, The problem for us all is that there is no definitive monograph on Hippeastrum since the Amaryllis manual by H. Traub, and much has changed taxomonically since that manual was printed. I think there is confusion amongst most of us Hippeastrum growers about the identity of a number of look alike Hippeastrums with orange colouration and greenish white throats. There is a degree of similarity between - H. puniceum, straitum, blossfeldiae and what was known in collections as H. equestre and pulverulentum; apart from the fact that they all grow naturally in Brazil and one can expect a notable degree of variation in their natural populations - particularly when they are geographically separated. I have faith in Mauro Peixoto's site for defining images of Hippeastrum species native to Brazil - and you will note that he shows 4 varieties (regional variants) of H. striatum. The URL is: http://mpeixoto.sites.uol.com.br/amaryl/… My own breeding experience of a H. striatum? that looks identical to the one called H. striatum var Petiolatum is that its an exceptionally fertile plant - and so I suspect its either a polyploidal form or a natural hybrid, either option creating a broader spectrum of colour and shape possibilities. Cheers Jim Lykos SydneyAustralia