Plant Catalog › Stylophorum diphyllum (Celandine Poppy) Stylophorum diphyllum (Celandine Poppy) $0.00 Blooms: Late April until Early JuneH: 12-18" W: 12-15"Color: Yellow Shades Add To Cart Added! Blooms: Late April until Early JuneH: 12-18" W: 12-15"Color: Yellow Shades