Newsletter  (Sep 2021)  
 
[From "Why Heritage Roses?", by Dominique Massad, pp. 20-23]
Starting from a seed of Rosa filipes obtained from the Beijing Botanical Garden, I singled out the seedling which flowered the best. It was then crossed with Chinas such as ‘Sanguinea’, ‘Mme Laurette Messimy’ (Guillot fils, 1887) as well as ’Rosina’, [???] a hybrid of Rosa wichuraiana which had been sold as ‘Le Vésuve’. The desired traits have been achieved after more than 25 years of trials: ‘Gunsho’ and ‘Eridion’ for color, ‘Parc de Maupassant’ and ‘Château de la Mothe Chandeniers’ for their scent, ‘Château de Guillerval’ for the size of the blooms, and the reblooming traits found in ‘Rose delacroix’, ‘Belle de Sardaigne’ and ‘Rêve de Mireille’.

Newsletter  (Dec 2015)  Page(s) 4.  Includes photo(s).
 
[From "My Adventure in Ramblers", by Dominique Massad, pp. 2-6]
In 1992, I used it [Sir Cedric Morris] as a female with the following: ...'Mikado' a polyantha with semi-double amber yellow blooms that pale as they age that was bred by Marc Guillot....From the first cross, one seedlings was retained because of its rambling quality and for its blue grey leaves and scented blooms. It first flowered in May 1995. The simple blooms are the same color as ‘Mikado,’ paling to white with age and held on corymbs. Unfortunately, it is sterile so cannot be used in further crosses. It was released in 2007 under the name of ‘Gunsho’.

Website/Catalog  (22 Sep 2015)  
 
Name: 'Massho'
Synonyms: 'Massho', 'Shogun'
ARS Approved Exhibition Name: Gunsho
S, my, Massad; flowers golden yellow, fading , single, flat, borne in clusters; once blooming; growth 16 - 20 ft.
[Sir Cedric Morris × Mikado (Guillot)]. Introductions: Shogun, Massad, 2007. Gunsho, Petrovic, 2015