Anytime you see a term you do not know, you can go along the right side of the windows in this cubit, and click on "AHS Online Dictionary" to look up the terms on the AHS site.
One polychrome, which is a color, that I know of is "Little Rainbow"
http://davesgarden.com/guides/...
The AHS terms page says "POLYCHROME: Flowers blending and intermingling many colors without distinct bands." and, LOL, they give a photo of Little Rainbow as an example.
melon is also a color description. AHS does not give a definition....I have looked up a few in the database, and they are registered as peach... so will have to keep thinking on one that would be "melon"..