Book  (1997)  Page(s) 165.  Includes photo(s).
 
Mousseux du Japon ('Moussu du Japon', 'Japonica') Moss. Description and cultivation... flowers: soft lilac-pink...

Book  (Nov 1994)  Page(s) 64.  
 
Japonica ('Moussu du Japon') Moss. Description... magenta-rose...

Book  (Sep 1993)  Page(s) 227.  Includes photo(s).
 
Japonica Moss. Description... small, semi-double flowers of magenta-pink. Despite its name, it appears to be of French origin. It seems to be unheard of in Japan.

Book  (Apr 1993)  Page(s) 392.  
 
Mousseux du Japon Moss, purplish rose, quickly fading to lavender, many stamens, ('Japonica'; 'Moussu du Japon'; 'Muscosa Japonica'). Description.

Book  (1993)  Page(s) 83.  Includes photo(s).
 
('Japonica', 'Mousseux du Japon') A very mossy (even on the leaves) Moss. Leaves are purplish when young. An old variety, perhaps raised in Japan. Once flowering. Height: 3 1/2 ft). Sweetly scented.

Website/Catalog  (1985)  Page(s) 33.  
 
Moussu du Japon..... 4 x 3’.

Website/Catalog  (1982)  Page(s) 27.  
 
Moussu du Japon ( Moss) Less double than the majority of Moss roses. Deep rose pink in colour, vigorous but slow to start. Heavily mossed. (S) 3 x 3’.

Book  (1971)  Page(s) 149.  Includes photo(s).
 
Mousseux de Japon Pinkish-purple, 4 ft. (1-2 m.) Moss rose distinguished by the heavy growth of moss which extends to young shoots and even lef stalks and surface of leaves as well as surrounding buds. Shrub rose of only medium vigour, generally only 3-4 ft. (.09-1-2 m.) Flowers pinkish-purple with a magenta tinge, semi-double or double, but opening rather loose and untidy. Mid to late June, not recurrent. Foliage strongly tinted when young. Sometimes known as Moussu du Japon' and 'Japonica.'

p.14. Photo.

Book  (1936)  Page(s) 129.  
 
Muscosa Japonica Rose, turning a steely blue crimson, double, flat. Leaves sage green, red tinged when young, not thorny, stiff moss on mid-rib. Stems not thorny but covered to the base with a green bristly moss. I have not traced the origin of this most curious variety. Its remarkable growth and young foliage make it worth a place, even without its flowers.

Book  (1936)  Page(s) 369.  
 
Japon, Mousseux du (moss) from Japan ? ; deep pink, large, semi-double, solitary or up to 5, fragrance 6/10, canes densely mossed, growth 6/10, 80 cm. = Muscosa japonica. Sangerhausen