PLANTS TO BE WINTERED OUTDOORS. 75 



ing illustrations, made from typical indoor and outdoor specimens. 

 The photographs reproduced in Plate XII were made on March 27, 

 1909. The plant shown in figure 1 of this plate was a seedling of 

 September, 1907, which had been kept in a greenhouse all its life at 

 a temperature suited to the growing of roses. The plant shown in 

 Plate XII, figure 2, was identical in history with the other until 

 October 20, 1908, when it was placed outdoors and exposed to the 

 vseverest winter conditions. It was one of the window-sill plants de- 

 scribed on page 74. The leaves shown on the indoor plant (PI. XII, 

 fig. 1) are those formed in the summer of 1908, which by reason of 

 the warm temperature of the greenhouse in which the plant was 

 wintered had never fallen off, although the plant had made no growth 

 later than October, 1908. Neither a flowering bud nor a leaf bud 

 has started on this plant. On the outdoor plant (PL XII, fig. 2) 

 the 4 flowering buds and 62 leaf buds which had lain dormant dur- 

 ing the winter had begun to push a few days before the picture was 

 taken. 



Plate XIII, from photographs taken on April 24, 1909, shows the 

 same two plants nearly a month later. The leaf buds on the outdoor 

 plant (PI. XIII, fig. 2) have grown into leafy twigs and the flower- 

 ing -buds are fully opened. Of the dormant buds on the indoor 

 plant (PI. XIII, fig. 1) only two have started to grow. Of these 

 two new twigs, one on the stem to the left, in the axil of the third 

 leaf from the top, has withered its tip and stopped developing before 

 making a full-sized leaf. The other new twig, on the stem to the 

 right, developed abnormally from the axil of a basal bract of a 

 flowering bud. It later made good growth and became a very vigor- 

 ous shoot. All the flowering buds on this plant dried up and pro- 

 duced no flowers. 



The erratic starting of dormant plants which have not been sub- 

 jected to the conditions necessary to bring them out of their dor- 

 mancy in a normal manner is well shown also in Plate XIV. This 

 illustration is from a photograph taken February 18, 1909. The 

 plant was a seedling of September, 1907, which was brought into the 

 greenhouse in early December, 1908, and remained there during the 

 winter. The illustration shows that only one of the two flowering 

 buds on the upper twig has started, one of the four on the lower 

 twig, and none of the leaf buds. 



There can be no question that for ordinary purposes blueberry 

 plants should be wintered outdoors. If it is desired in experimental 

 work to force blueberry plants to fruit in a greenhouse during their 

 second winter, it will be necessary either to etherize them or to find 

 out some other method of treatment by which the starch in their 

 twigs can be transformed into other carbohydrates available for the 

 building up of new plant tissues. The writer believes that in the 



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