snowdrop 'Primrose Warburg'

'Primrose Warburg' is a vigorous, bulbous perennial, to 20cm tall, with grey-green, strap-like leaves that are slightly rolled outward. The flowers have a distinctive, intense-yellow ovary. The outer petals are white, with occasional faint green veining, whilst the inner petals have a beautiful yellow-green mark across the petal notch