Rosa 'Peace'
Hybrid Tea Rose (Rosa 'Peace')
The referenced article mentions "...Rosa cv. 'Peace' (this is now incorrect for two reasons: firstly, the use of "cv."; secondly, "Peace" is a trade designation or "selling name" for the cultivar R. 'Madame A. Meilland' and should therefore be printed in a different typeface from the rest of the name, without quote marks, for example: Rosa Peace.)..." A different typeface used for peace.
Another example would be Canna x generalis 'Phasion', additional cultivar/trade name 'Tropicanna'.
Canna Tropicanna®
I confused the Group nomenclature when submitting a sp. change to (japonica hybrid), which should be rejected.