Are flowers asexual

I'll say no. There are flowers that are called "perfect" which produce both pollen and ovules (seeds). There are flowers that only produce pollen. There are flowers that only produce ovules. There are sometimes flowers that don't produce pollen or ovules, but help attract pollinators to the flowers next to them (like asters). There are even some flowers that produce both pollen and ovules, but the seeds that they produce are produced without sex (it's called apomixis and is pretty rare).