Ranunculus Cortusifolius PICK UP ONLY. Giant buttercup. One to the most impressive yellow perennials we have in the nursery. When this fellow it in flower everyone wants to know what it is. The small multiple yellow buttercup flowers are held together on sturdy stems 60cm above large green maple like leaves. A native to the Canary Islands. An herbaceous perennial well worth adding to your woodland garden. 80cm by 50cm.