Medium yellow Hybrid Tea.
Registration name: Mrs. MacKellar

Bred by Alexander Dickson II (1857-1949) (United Kingdom, 1915).
Introduced in Australia by Hazlewood Bros. Pty. Ltd. in before 1921 as 'Mrs. MacKellar'.

Hybrid Tea.  

Lemon-yellow and light yellow, ages to white .  Moderate fragrance.  Large, double (17-25 petals), borne mostly solitary, in small clusters bloom form.  Blooms in flushes throughout the season.  

Upright.  

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