Stipa gigantea

About

Celtica gigantea, commonly called giant feather grass, giant needle grass or golden-oats, is a species of flowering plant in the grass family, Poaceae, native to the Iberian Peninsula and Morocco. Despite being renamed and placed within the genus Celtica, it is still widely referred to—both in horticultural literature and amongst gardeners—by its synonym, Stipa gigantea.

Summary from Wikipedia