Book  (1993)  Page(s) 99.  Includes photo(s).
 
Hybrid Perpetual. Weigand (Germany) 1935 ('Frau Karl Drushki' x 'Souvenier de Claudius Pernet') Repeats, especially good in autumn.

Book  (1958)  Page(s) 398.  
 
Symphony. HT. (C. Weigand; int. P. J. Howard, ß35.) Frau Karl Druschki X Souv. de Claudius Pernet. Bud long pointed; fl. large, dbl., high centered, flesh-pink to Venetian pink. Fol. leathery, dark. Vig. (28) Pl. Pat. 79 (expired).

Book  (1947)  Page(s) 247.  
 
Symphony (H.P.) is a modern hybrid perpetual with very large, double, flesh-pink flowers, deepening at the centre. Growth is vigorous and erect, and flowering free and long; leaves are large and deep green. Weigand 1935...Tall growth. Without scent...June-September. Hardy.

Book  (1936)  Page(s) 691.  
 
Symphony (HP) Weigand 1935; Druschki X Sv. Cl. Pernet; flesh-pink to pink, very large, double, high-centered, lasting, floriferous, repeats well, long strong stems, growth 7/10, upright, 1 m.