Prairie Coneflower

(Ratibida columnifera) Yellow flowers with brown-black centre, perennial, 30-60 cm (12-24") tall, blooms July to September.  Will grow in most soils in full sun.  A good plant for a water conserving garden or a butterfly garden,  Seed in spring or late fall.  Sow seeds 4 to 6 mm (1/4-1/8") deep.