zodiac10 Sep 2005

1) To attract insects to pollinate them (not primarily to produce seeds,) but that's neither here nor there. Before you argue, the flower - that is, the colorful petaly part of the plant - is devised for bug attraction and fertilization. You can say that's a step in seed production, but then so are all of the plant's functions.
2) Pure prettiness.
3) To provide something to compare pretty girls with.
4) To give Jesus a better metaphor than "consider the coniferous trees of the field, they toil not."
5) To provide olden poets with rhymes for bower, hour, and power.
6) To make crowns and garlands out of.

I'm not even being silly yet. Seriously. At the very least, if flowers weren't pretty, comparable to beautiful women, and easily-rhymeable, you'd have written your poem about something else that was.