VARIETIES 85 



12. Tendency to make second growth. Second growth 

 (Fig. 38) is most prevalent in a season when drouth 

 is followed by a wet period. The drouth checks 

 the development of the tubers, causing them to begin 

 to mature, while the subsequent wet period restarts 

 growth. If one variety or a plant does not show an}' 

 such abnormal growth, it is regarded as being more 

 vigorous; hence, other things being equal, such should 

 be used for seed, and all showing second growth 

 should be rejecfted. Abnormalities in shape may be 

 due to contact with stones or hard lumps. 



13. Triuness to type. This may be viewed as em- 

 bracing several considerations. In new varieties there 

 is always more or less tendency to lose the features for 

 which the variet}' has been selected. The type is then 

 said to be insufficienth' fixed, and often those which 

 depart from the type degenerate. In such cases selec- 

 tion must be continued. 



Many varieties are deliberately or unintentionally 

 sold for something else. Mixtures of varieties are 

 sold as one. Good varieties are often renamed and 

 sold by unscrupulous seedsman and others as some- 

 thing new. There is considerable duplication of 

 varieties of potatoes;' thus. Brooks, of Massachusetts,^ 

 believes, after growing the following varieties, that King 

 of the Earliest and Early Ohio, Salzer's Earliest and 

 Bliss Triumph, Mills' Banner and Livingston Banner 

 are identical, and that White Beauty and Cambridge 

 Russet differ but slightly. Mills' Mortgage Lifter is 

 often sold as Burpee's Extra Early. Some dealers 



» Wyo. Bui. 32, p. 65. * Hatch (Mass.) Sta. Report, 1899, p. 81. 



