@Lilliwyt
Mmm. One could take a guess.
There's also the butterfly (Yoku-ben) mentioned in the dictionary over the word "Desire" (Yoku-bou). pag. 31.
However, when doing some quick research I couldn't find any info on a butterfly shaped like a flower. Instead, the engine threw the name of a blue/purplish flower shaped like a butterfly with a bird-like tail. The scientific name for the flower(not really the plant) is Clerodendrum Ugandense.
I don't know if there was some stuff lost on TL there or some other thing going on with the plot, but this flower kinda matches the description too much.
Casually this flower is full of nectar, so it atracts a lot of insects like bees and well... butterflies.
Why did I do all this on the first place? It was fun.