Say Core-E-OP-sis. Research says the common name is Tickseed but I've never heard that. It's native to the Americas and likes full sun. The common varieties are yellow and usually grow to about 2 feet tall which is unusual for a perennial. Most perennials grow taller. I'm always looking for something a bit taller than a border but not too tall. Herbaceous perennial as it is, it needs to be cut back almost completely in winter.
There are many new colored hybrids of Coreopsis. I should have bought that pink one I saw about a month ago but didn't. I AM a sucker for orange flowers and blooms that change color so I had to buy this one today even though I'm breaking my own rule about planting in the summer heat. This variety is called "Citrine" after the crystal rock it resembles. Do you grow Coreopsis?