PictureThis identifies an African lily (Agapanthus africanus)

Agapanthus africanus (African lily) is a flowering plant from the genus Agapanthus native to the area of Cape of Good Hope in South Africa. A. africanus is more difficult to grow in gardens than A. praecox, and almost all plants sold as A. africanus are actually A. praecox.

It has a short stem bearing a tuft of long, narrow, arching leaves 10–35 cm long and 1–2 cm broad, and a central flower stalk 25–60 cm tall, ending in an umbel of 20-30 white, or bright blue, funnel-shaped flowers, each flower 2.5–5 cm diameter.

From Wikipedia