I wonder what sort of hat would allow you to show off a purple flower at the nape of your neck to its best effect.
I saw the poem earlier today, and have been puzzling over it since.
If the hat was worn so low, that at the end of it, on your nape would be a purple flower, how would she know that the lady was wearing her hair in a bun? Unless it wasn't a hat, but some stupid looking bun-cover thingy. I mean seriously, who would do something like that? In a convertable?