More to explore:
F ? / Carex "blue zinger"
Carex testacea 'Prairie Fire'
stone path through groundcovers and sedge meadow lawn substitute (Carex pansa)
Carex elata 'Bowles Golden'
Carex tenuiculmis Cappuccino coffee sedge
Gorgeous, vivid leaves! Carex oshimensis Everest (TM) PP20955. Excellent container plant and lovely in mixed borders.
Plants as architecture
Angelica stricta purpurea - From Annie's Annuals