This section is from "The Horticulturist, And Journal Of Rural Art And Rural Taste", by P. Barry, A. J. Downing, J. Jay Smith, Peter B. Mead, F. W. Woodward, Henry T. Williams. Also available from Amazon: Horticulturist and Journal of Rural Art and Rural Taste.
This is one of the most popular, and commonly cultivated sorts in our gardens - growing and blooming with as much ease as a cabbage. It is a native of Georgia - but is as hardy as an oak all over the northern states. The specific name, flaccida, is given from the greater pliancy of the leaves, which, instead of being perfectly stiff, like some of the other species, are a little weak, and frequently bend in the middle. This species has no stem or trunk, and the reader may get a good general idea of its appearance when in bloom, by imagining the foregoing figure of Y. gloriosa, with the foliage springing directly out of the ground - the leaves, however, being narrower, and more numerous, and the flower stem about half the height. There are slender threads along the edges of the leaves. This Yucca blooms in our northern gardens as freely as the common white lilly - throwing up its beautiful pyramidal flower stalks, two or three feet high, about the end of June, and bearing a profusion of fine milk-white flowers, all the month of July. It is one of our favorite evergreen plants, beautiful at all seasons.