I recall reading that this form is suspected of being the result of a viral infection. If anyone has any information or references that confirms or denies this suspicion, I would appreciate hearing from you.

However, there is an Australian patent application for MEIzuzes (dated Oct. 2002) at http://www.ipaustralia.gov.au/pdfs/plantbreed/PVJ_Vol_154.pdf (see page 57). That patent application describes a hybrid tea with a dark pink upper (RHS colour N57) and brilliant yellow reverse (RHS colours 13A and 13B), medium fragrance, blooming mostly as single flowers (not clusters), an average size of 11.423 cm (4.5 inches) and most similar to the rose in commerce known as ‘MEIgriso,’ i.e., Baronne Edmond de Rothschild. That description is also very similar to what Meilland's website shows as a picture for that rose. And the Australian patent application for MEIzuzes says that rose was granted a patent in the EU in 1997. The Australian patent application also gives the parentage of MEIzuzes as seed parent (‘MEIrigalu’ x ‘MACar’) x pollen parent ‘MEIpobil’. That would be (Colorama x Piccadilly) x Rendez-Vous.