Newsletter  (2005)  Page(s) 28. Vol 26, No. 3.  
 
Dr., Ronni Cohen-Sandler. I'm Not Mad, I Just Hate You.
There is no other mention in any book or website that I can find of a rose named La Belle Gitara - perhaps it is another or[?of] Nancy's creative fictions.
.... This compulsion is undoubtedly fuelled by the almond-green-eyed monster in one who is never likely to drop even a mild 'helitotrope' into conversation, and would need an illustrated dictionary to fully comprehend the "lucullian cardinal-purple." In a valiant effort to improve my vocabulary, I Googled "lucullian" and discovered the non-illuminating answer in the Dictionary of Difficult Words:
lucullan, lucullean, lucullian (adj). pertaining to Lucullus, ancient Roman consul noted for his elaborate banquets.

Book  (1997)  Page(s) 147.  
 
But it was Nancy Lindsay's roses that we particularly went to see. We had had lists of her roses with lengthy descriptions, and were enthralled by her enthusiasm. The thought-provoking names poured from her. For some years i was frustrated by these names because I could not find them in any of the old French books in my possession, nor in the Lindley Library. At length the reason dawned on me. Finding an unknown rose in an old garden without a name she let her fancy run free and coined a name for it. Thus did the following names appear in commerce (in her own catalogue): La Belle Gitara Exquisite almond-green bushes, spangled with glittering camelias of amaranthine-fuchsia ripening to a lucullian cardinal-purple.