Book  (1958)  Page(s) 8.  
 
American Flagship. HT. (Lammerts; int. C. R. Burr, '46.) Crimson Glory X self. Description. Pl. Pat. 676

Article (magazine)  (Feb 1952)  Page(s) 103.  
 
American Flagship a Seedling of 'Crimson Glory'. Hybrid Tea; Lammerts, 1947; 'Crimson Glory' x 'Crimson Glory'; Scarlet.

Book  (1950)  Page(s) 11.  
 
Harry H. Hazlewood. The New Roses of 1950. 
American Flagship (Lammerts, 1945), has long pointed buds opening to quite large semi-double to double blooms which have almost a scarlet shade. Flowers are lightly fragrant and promise to be a welcome addition.  The growth is good.

Website/Catalog  (1950)  Page(s) 4.  
 
Novelty Roses 1950. American Flagship (H.T.) (Lammerts, 1945). Long pointed buds opening to Iarge lightly fragrant blooms of unfading scarlet. Good growth and promising well. 10/6 each.

Article (misc)  (1950)  Page(s) 188.  
 
American Flagship Hybrid Tea. Red. (Lammerts; introduced by C.R. Burr & Co. 1946) US Plant Patent No. 676