I saw a thick group of flowers in the Azalea Garden, about 4 ft high, visible from Kelly Drive.
We checked in with our staff who manage this garden. The plant you saw is an Anenome (sometimes called a windflower). It is an herbaceous perennial. There are many different cultivars in all different colors and sizes. The one in the Azalea Garden is
Anothother outstanding one is Anemone 'September Charm' and is available at many garden centers.