Book  (1936)  Page(s) 568.  
 
Plato (spinosissima) ? ? ; pure red, single, once-blooming, free-blooming, glossy black fruit, growth 7/10, upright, 1 m.

Book  (1875)  Page(s) 75.  
 
The Scotch Rose. (Rosa spinosissima).
The following are a few of the best varieties:
Pluto: deep rose.

Book  (1848)  Page(s) 18.  
 
The Scotch Rose.
58. Plato; flowers purplish red.

Book  (1838)  Page(s) 420.  
 
Early Summer Roses. Red.
Scotch Roses. — (Rosa spinosissima.)
Pluto, dark and double.

Book  (1838)  Page(s) 410.  
 
Although the present work pretends to treat only of rose culture as practised by the French, it would be unjust to pass over wholly without notice the remarkable varieties obtained in our own country. A list of the finest roses, of unquestionable English origin, is therefore subjoined; which the lapse of a few years will probably enable us to double in extent.
Rosa Spinosissima.
Scotch Roses.
Pluto

Website/Catalog  (1837)  Page(s) 9.  
 
Roses for the Summer Rose Garden, that bloom only in May, June, July.
Scotch Roses (Rosa spinosissima).
Pluto, very dark red colour; very double.

Magazine  (1 Dec 1834)  Page(s) 279.  
 
Remarks on the Colours and Properties of One Thousand Species and Varieties of Roses. By St. Patrick.
Scotch Roses.
984. Pluto... Very dark red.