2 favorite votes.  

Deep yellow Hybrid Tea.
Registration name: Souvenir (hybrid tea, Pierson 1930)

Discovered by Wallace R. Pierson (United States, 1930).
Introduced in United States by A.N. Pierson, Inc. in 1930 as 'Souvenir'.
Introduced in Australia by Hazlewood Bros. Pty. Ltd. in 1935 as 'Souvenir'.

Hybrid Tea, Pernetiana.  

Golden-yellow.  Moderate fragrance.  36 to 42 petals.  Medium, full (26-40 petals), flat bloom form.  Blooms in flushes throughout the season.  Pointed buds.  

Glossy foliage.  

USDA zone 6b through 9b (default).  Can be used for cut flower or garden.  Vigorous.  

United States - Patent No: PP 25  on  30 Aug 1932   VIEW USPTO PATENT