While this photo was taken July 1 this year, this plant is flowering again. These flower stems are very long – about 3 feet tall (1 meter), yet the flower heads themselves are quite small. The one in the picture is 3 inches across, at most. And each flower head is really many teeny-tiny florets.
I’ve only seen this flower in a public planting here in the Northwest US, one time, and it was more sparse than lush. One reason might be that it grows as an annual here in Oregon, but can naturalize in tropical climes, as Hawaii. But then you have to watch out, because it has become invasive some places. I try not to plant anything that can become invasive in my area. We are doing battle with enough unwanted plants, for example Himalayan blackberries (planted to control erosion) and English hawthorn (brought by early settlers for fence rows).