Dawson No. 2 (Rambler) [Rosa multiflora x Miss Hassard]
and Forest 5(240): 460-461 (September 28, 1892)
WE have on many occasions alluded to some hybrid Roses which Mr. Jackson Dawson, of the Arnold Arboretum, had produced by using pollen of various hardy sorts upon the Japanese Rosa multiflora, which is one of the most beautiful of hardy flowering shrubs. One of these hybrids, in which General Jacqueminot was the male parent, was the subject of an illustration in GARDEN AND FOREST last year (vol. iv., p. 533). It is a vigorous climber, with clusters of semi-double rose-colored and exceedingly fragrant flowers. We reproduce in this number (see p. 461) a photograph of another of these hybrids, in which the single flowers are pure white, with yellow stamens, and borne in clusters after the manner of the seed parent. They are three times as large as the flowers of Rosa multiflora, and are fragrant. In this case the pollen parent is the Hybrid Perpetual, Miss Hassard, and the plant has the thorns and foliage of this variety and the half-climbing habit of the Japanese species. Miss Hassard is a Rose which was raised from Marguerite de St. Amande, which is a free grower, with sweet-scented flowers. Marguerite de St. Amande is a seedling of Jules Margottin, and this was probably raised from the old and very hardy La Reine, a Rose introduced fifty years ago, and still well known. Roses of the La Reine type endure more cold than any other class except the descendants of Baronne Prévost, and they include such admirable kinds as Anna de Diesbach, François Michelon and Paul Neyron. The new hybrid, therefore, comes of free-growing and hardy parentage, and, if pedigree counts for anything, it ought to prove one of our sturdiest plants. Rosa multiflora, although it has been known for a hundred years, has only in very recent times been introduced to gardens, although its double form crossed with Rosa Indica and others has been the origin of the Miniature Cluster or Polyantha Roses which have long been popular. They are not reliably hardy in this country, however, and we have no doubt that the new strain of Roses which is being raised by mingling the blood of Rosa multiflora with perfectly hardy sorts will produce many plants which will prove satisfactory and useful.
Trans. Mass. Hort. Soc. (1893)
Jackson Dawson showed an interesting lot of seedling Hybrid Roses, two of which were awarded First Class Certificates of Merit. No. 2, a cross between Multiflora and Miss Hassard, has the foliage of the latter but with the habit of the former, only with much larger flowers and beautifully crimped petals; the color is pure white. No. 3 is a cross between Multiflora and Gen. Jacqueminot, with the same sized flower as Multiflora but double and slightly tinged with pink.