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.
Two varieties of the Clematis patens of Decaisne (C. carulea, Lindley?), introduced, with others, from Japan by Dr. Yon Siebold. Like other varieties of the same species, they are hardy, and are cultivated in the same manner. They will grow in almost any well-drained soil. The Clematis loves the full snn, but does not bear high winds. They grow best trained around columns, or when employed to cover an old tree. They do not readily produce seed, but are multiplied by cuttings or by layers. Other handsome varieties of this species, figured in European magazines, are C. patens Sophia, purple, with a shining green band down the middle of each segment of the flower, and C. p. monstrosa, in which a number of the stamens are transformed into petals, making a semidouble flower.
In an article on climbing plants, the Cottage Gardener (London) remarks: " After these come several new, or rather newish, Clematises, which, like Caerulea, are sufficiently hardy to stand our climate, but are seen to much better advantage in an orchard-house temperature, and protected by a glass veranda, or some very cool greenhouse. Of these, Clematis lanuginosa is, as far as we yet know, the best.
" My own opinion is, that Clematis Sieboldi, C. patens (which is the proper name of Carulea), and the grandiflora variety of it, together with C. lanuginosa, C. lanuginosa pallida, Sophia, a continental seedling from patens, alias Carulea grandiflora, C coriacea, a showy kind from New Holland, and C barbellata from the Himalayas, and some others of recent introduction, should all be grown on their own roots for pot culture; but when used for trellis-climbers out of pots, I am certain they would answer better if they were grafted on six-inch pieces of the roots of Clematis montana. Also, I think that, no matter how they " went off" in rapid growth, they ought to be cut back to near the grafted parts the first two seasons, if not the third, so as to get a thoroughly strong bottom, that would hold on for years and years, and still increase in beauty and strength.
" Another fine-looking Clematis - indivis lobrata - was new to me; but, in an orchard-house, all these hardy house-climbers will assume their native character".