Website/Catalog  (2020)  Page(s) 139.  
 
Rosella, synonym. Red Poppy, Pere Dot, 1931, hybrid Pernetiana, scarlet-crimson, golden-bronze at the base, with a tone of almost orange, shrub, single, medium size (2,75 inches), abundant bloom in clusters, mild fragrance, long, thick and glossy foliage, Roger lambelin X Mme. Edouard Herriot, vigorous growth (approx. 8 feet), planted in the Rosary Dot and Camprubi in 2011, bibliography: RE-LD-mcf10, TARA1926

Book  (Apr 1993)  Page(s) 519.  
 
Climbing Hybrid Tea, pink blend, 1931, 'Mme. Edouard Herriot' x 'Roger Lambelin'; Dot, P.; Conard-Pyle. Bud long, pointed; flowers velvety carmine, base yellow, orange undertone, single, medium (2 1/4 in.), borne in clusters; slightly fragrant; foliage large, glossy; vigorous (8 ft. or more) growth.

Book  (1958)  Page(s) 359.  
 
Rosella. Cl.HT. (P. Dot; int. C-P, '31.) Mme. Edouard Herriot X Roger Lambelin. Bud long pointed; fl. medium size (2¾ in.), single, slightly fragrant, velvety carmine, base yellow, orange undertone; cluster. Fol. large, glossy. Vig. (8 ft. pr more); profuse bloom.

Book  (1936)  Page(s) 623.  
 
Rosella (HP) P. Dot 1930; Mme. Ed. Herriot X Rog. Lambelin; glossy velvery carmine-scarlet, base golden-yellow with orange reflexes, 6 cm., single, cluster-flowered, blooms little by little, fragrance 6/10, floriferous, light repeat, growth 7/10, climbing, 2 m.

Article (misc)  (1935)  Page(s) 102.  
 
Rosella has bloomed only in the spring but is rather different from most Hybrid Perpetuals in that it is almost single... of very brilliant carmine, with a yellow center...

Book  (1926)  Page(s) 52.  
 
Pedro Dot. Results of 1924 Rose Hybridization in Spain.
Single-flowered varieties, so appreciated in England, have no value here, and I have discarded many pretty things. However, I kept one which I consider superior and worthy of being known. It is from 'Roger Lambelin' x 'Mme. Edouard Herriot'. This variety is very vigorous, a half-climber, of abundant bloom in spring and autumn, giving flowers of a vivid and brilliant crimson-scarlet, with gold at the base. A similar one I never saw. it is very fragrant and has been named 'Rosella' (Red Poppy). This has been crossed again with other varieties, and I have reason to hope for some pleasing results.