Definition of "agapanthus"

Even the succulent blue lilies—a variety of the agapanthus which is so familiar to us in English greenhouses—hung their long trumpet-shaped flowers and looked oppressed and miserable, beneath the burning breath of the hot wind which had been blowing for hours like the draught from a volcano.

1887, H. Rider Haggard, chapter 1, in Jess‎

Here in their season grow the blue agapanthus, the wild watsonia, and the red-hot poker, and now and then it happens that one may glimpse an arum in a dell.

1948, Alan Paton, chapter 3, in Cry, the Beloved Country‎, New York: Scribner, page 11