Hello. I'm pretty sure it's a dahlia. if it's small... like a dwarf variety... multiplies by seeds..... if it's a tall one... normally by rzihomes... they produce a clump like potatoes. and their flowers are "fuller" - more layers of petals. yours... is definitely one that sets seeds. google "dahlia" or "dwarf dahlia" to see how many colors and shapes it comes in. CALIN