Book  (1917)  Page(s) 88.  
 
Flag of War. Beautiful clear shade of dark red without bluish tinge. Mass of golden stamens in centre. Keeps unusually well for a single. Kelway. Single. Red. Medium. Early. Medium height, strong and erect. Stems reddish. Free bloomer. Garden and cutting.

Magazine  (Nov 1911)  Page(s) 71-72.  
 
FLAG OF WAR.
Species — P. albiflora.
Originated by Kelway.
Donated by Farr.
Description of bloom — Type of bloom single. Color (total effect) purple garnet 4 (165) ; guards
Description of plant — Habit of plant erect, tall, compact. Growth strong and healthy. Stem long, strong, vivid red. Blooming habit medium. Buds single. Foliage medium furnished, dark green, medium size ; veins red. Commercial value—For cut bloom poor; landscape value good. Variety as a whole good.
Remarks — Similar to "Frank Bramley " but darker foliage, darker red stems, and slightly brighter bloom, not quite as large, blooms single.

Book  (1907)  Page(s) 225.  
 
2634. WAR, FLAG OF; P.
(1) 1904, Harrison's Paeony Manual, p. 52.

Book  (1904)  Page(s) 52.  
 
Single Paeonys.
I name a few of the leading ones from Kelway's list.
Flag of War. Deep blood-crimson.

Website/Catalog  (1900)  Page(s) 17.  
 
Kelway's New Single-Flowered Pæonies for 1900.
Flag of War, deep blood-crimson.