CONTRIBUTIONS FROM THE WISLEY LABORATORY. 605 



It must be remarked, however, that very few plants in the row 

 other than those arising from soft tubers produced good foliage, 

 so that the single case of a green plant (75) is worthy of note. 



Tuber 76, one of the softest, was photographed (fig. 192) and then 

 cut in half along the line a — The halves were potted in Wisley 

 soil and placed in the greenhouse. Both halves produced blotched 

 plants, and the latter were exhibited as typical bad plants at the 

 Royal International Horticultural Exhibition. 



It cannot be clearly stated that soft or flabby tubers necessarily 

 produce bad plants. 



(b) Rough or smooth skin. 



It will be seen from the appended table that the occurrence of 

 bad plants bears no relation to the character of the skin of the planted 

 tuber. 



Tuber 57 Table I. skin rough bad plant. 

 „ 65 „ „ „ smooth 

 20 „ ,, ,, smooth 

 26 ,, ,, moderate 



11 ,, ,, ,, moderate 



(c) Other characters. 



A number of scheduled tubers (Table I.) were planted in the open 

 and produced a greater number of bad and poor plants than those 

 grown in the greenhouse (section D b). The following descriptions 

 refer to consecutive plants in the row : 



39 Table I. good foliage. 



38 ,, ,, only a few inches high, blotched foliage. 

 41 ,, ,, only a few inches high, not blotched foliage. 



31 ,, ,, blotched foliage, in flower. 

 45 ,, ,, blotched foliage, in flower. 

 48 „ „ good foliage. 



27 „ „ part of the foliage blotched. 



28 „ „ blotched foliage, in flower. 



32 ,, ,, a poor plant. 



44 ,, ,, good foliage, in flower. 

 47 ,, ,, blotched foliage, in flower. 



With these examples of bad plants in addition to those mentioned 

 above (E b) , let us test other characters : 

 1. Sprouts damaged or not before planting. 



Sprouts damaged. Sprouts not damaged. 



20 Table I. Bad plant 11 Table I. Bad plant 

 57 i» „ » » 26 „ „ 



65 » „ „ „ 38 „ „ „ „ 



21 ,, „ Good plant 31 „ ,, 



28 „ „ „ „ 



Hence bad plants were produced by tubers whether the sprouts 

 were injured or not. 



