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.
Francis Parkman says, in The Journal of Horticulture: "Several years ago we received from Japan a small plant in a pot. It was without name, but was evidently some species of Wistaria. It grew with the greatest vigor, till its longest shoots measured more than thirty feet from the ground. Last season it bloomed for the first time. From the character of its foliage we had supposed it to be the white variety of W. sinensis, and we were almost as much surprised as gratified when we saw it hung with long pendent clusters of perfectly double flowers, a shade deeper in color than the common single Wistaria. In short, we found ourselves in possession of a novelty of the first order, which, so far as we know, has not yet appeared in the catalogues of any European nurseryman. The depth of the color of the flowers, the compactness and length of the clusters, and the vigorous, hardy character of the plant - which has stood three winters totally unprotected, and without the slight-est injury - make it an invaluable addition to the list of hardy climbers".