Tau lives in a cold climate without many pollinators, so seeing flowers in the wild is pretty rare. There are several greenhouses around the colony that produce various flowers though. Among those, he quite likes the rainbow pansy. It's an engineered species, originally based on the yellow pansy, that has bands of yellow, blue, white, red and purple in its petals, and if the light catches them just right, they have a faint iridescent sheen.