Centaurea macrocephala (Giant knapweed):
Huge, bright yellow almost fluffy flowers in mid-summer follow attractive papery buds. Attractive to bees.To 1.5m. Hardy.
[Collect Only]
Cephalaria gigantea (Giant scabious):
Very tall wavy stems topped with large lemon yellow scabious-like flowers. Easy to grow. May need staking or support. Hardy. Up to 2m.
Ligularia przewalskii:
Elegant spikes of golden yellow flowers on black stems above very deeply divided green foliage.
[Collect Only]