Multiplying Butterpat Chrysanthemum January 22, 2017

I bought a small container of Butterpat at the Round Top Herb Festival last spring  The yellow flowers in the fall were beautiful and numerous.  It is spreading by underground stolons with little leaves appearing far away from the original container.

 I need to cut away the long bloom stems that look like dried sticks.

 It has spread through my iris.

 This little fellow in the photo below is growing outside of the flowerbed.