I really like Centaurea macrocephala. To me most Centaurea look like little pineapples when in bud and this one especially so. The flowers are bright yellow and the base of the 'pineapple' is covered with shiny, fuzzy brown scales. The plants 3-4 feet tall and bloom in early June. The flowers can be a couple inches across and should be cut while still in this 'pineapple' stage.
I started about 25 of these five years ago and they have faithfully come back year after year. This year I decided I could use a few more and got another packet of seeds from J.L. Hudson for $2 - what a deal.