According to [IStearn's Dictionary of Plant Names[/I], concolor is defined as; 'of the same color throughout'. If you go by the definition of 'con', we're all in trouble, as it can mean against, to stear a ship, or a criminal, as in con artist. Whew!
Yes and as a prefix, con means 'with', 'together' or 'joint'
according to Wiktionary
Ok .. forget about that confusion .. I am going back to admire the flower