Gardeners' Chronicle 29(741): 161 (March 9, 1901)
Royal Horticultural: Scientific Committee.
February 26.— Present; Dr. M. T. Masters, F.R.S , in the chair; and Messrs. E. Im Tbura, Odell, Houston, Holmes, Worsley, Rendle,
Chapman, Groom, Saunders, O'Brien, Druery, Dr. Muller, Rev. W Wilks, Prof. Boulger, and Rev. G. Henslow (Hon. Sec).

Double Tulips.Mr. Houston exhibited and commented upon an early double Tulip, pointing out that the filaments of the stamens became petals (as in the Water Lily), and that from his experience a dry poor soil appeared to be conducive to the process of doubling. Stock seed, for instance, gave 90 per cent. of doubles under those conditions. On the other hand, Mr. Wilks observed that Papaver Rhoeas became double in a rich garden border, but rarely, if ever, so in the wild state. Professor Boulger remarked that he had found Ranunculus acris and Geum rivale double in moist places; Cardamine pratensis has also occurred double in similar situations. Mr. Douglas' experience was that Carnations raisid in pots gave many more doubles than when in the open border, only 10 to 12 per cent. being single. This would seem to agree wfth Mr. Houston's experience. Mr. Henslow drew attention to the fact that it was long ago asserted by Mr. William Masters that a suspension of vitality must take place before a flower is formed, whether single or double; that mere vegetative vigour is not the cause of doubling, but that when once the doubling has been developed, and, as Mr. Masters said, "is constitutional or in the blood," then abundant food will favour the development of double flowers. Mr. Masters gives the following instance in the case of Balsams:—"One year we did not pot off from the seed pots for many weeks after they were ready. They were, in fact, starved before being transplanted, and only produced single flowers. I treated them liberally, and they then bore flowers as double as could be wished." Mr. G. Duffield some years ago produced double Lapagerias, and remarked that both a white and a red-flowering plant, growing side by side, bore double flowers in the same year, and remarked that it seemed curious, as the plants were by no means remarkable for vigour. This, however, was apparently the cause. Mr. Laxton has also observed with regard to double Peas:—"I am of opinion that a check during the growth of the plant, either from drought, frost, or even injury to the stem, may produce it. Hitherto all the double-flowered forms have been produced later in the season, just as late or second blossoms of Apples and Pears are frequently semi-double, while the early flowers of zonal Pelargoniums have often from six to ten petals." From Goebel's observations, double-flowered Stocks can be raised from seed of single-flowered, up to 90 per cent., if the smaller and abnormally formed seeds are selected. Other testimony of a similar kind might be quoted in corroboration.