Book  (2005)  Page(s) 161.  Includes photo(s).
 
'Hana-daijin' (Magnificent Flower or Minister of Flowers) Semi-double, beetroot purple (71 A) flowers have petals weith serrated tips and diffuse dark red flares at the base. The anthers are golden yellow with red filaments and surround green carpels with red styles and a deep red sheath. A pretty plant, but the flowers have little fragrance.

Book  (2002)  Page(s) 79.  
 
'Hana Daijin', Flower minister, famous Japanese variety, with large, loosely double violet bloom

Book  (Jan 2000)  Page(s) 228.  
 
Hanadaijin Tree Peony. ex Japan pre-1910. Also sold as 'Magnificent Flower'. A semi-double purple suffruticosa...

Article (magazine)  (Jan 1955)  Page(s) 57.  
 
Alphabetical Check List of Tree Peony Names In  Public Collections And/or Available in Nurseries 1954-1955
Japanese, Purple, 'Hana-daigin' (Magnificent Flower) (Jap. bef. 1910), [Gardens] Scott Foundation, Whitnal Park Botanical Gardens, University of Washington Arboretum, [Nurseries] Curtis Garden

Website/Catalog  (1914)  Page(s) 7.  
 
Paeonia Moutan (Japanese tree peony)
10. Hana-daijin, Purplish pink, enormous flowers, 12 [inches across].

Website/Catalog  
 
Hana Daijin Pivoine semi-double. Pourpre lumineux. Couleur uniforme. Pétales vaguement ondulés en bordure. Pour les amateurs de couleurs intenses !
Semi-double peony. Bright purple. Uniform colour. Petals slightly ruffled on the edges. For collectors of intense colours!
1.2 - 1.5 m, no fragrance, 15-25 April