Now that poppies and sunflowers also produce dyes... "rose red" and "dandelion yellow" should be like other dyes... simply red and yellow respectively.
Also the rose flower is gone, but the texture is still named "flower_Rose".
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The names aren't that big a deal, as you can still get them from the flowers by those names, as well as by the new flowers (technically speaking, the yellow flower was only known as Flower in-game prior to the introduction of the new flowers, so it was renamed to match the dye). I suppose the texture name is a bit more likely to change, although it could cause issues for resource pack makers updating their pre-1.7 packs.