Queen Anne's double daffodil

'Eystettensis' is a double daffodil, 20cm high, with grey-green leaves, and outward-facing flowers, 6cm across, composed of six whorls of pale sulphur-yellow perianth segments, all the whorls above each other which gives a starlike effect, and each whorl shorter, narrower, and more curved inwards than the one below, in spring