12 MASS. EXPERIMENT STATION BULLETIN 401 



6. Schmidt and Vernon are similar in many respects. However, the one-year 

 whip of Vernon is taller and somewhat more slender with longer internodes. 

 Vernon has heavier petiole pubescence. Its leaves are somewhat longer, with more 

 rugose, semi-glossy surface and somewhat duller serrations than those of Schmidt. 

 Other differences may be present in the two-year trees, but because of lack of 

 material, these have not been compared. 



7. SoDUS resembles Napoleon in general habit of growth, bark color, lenticel 

 characters, and general leaf appearance; but it differs noticeably from that 

 variety by having heavy pubescence on the petiole and rather large yellow glands. 

 Its leaves are somewhat less folded also. 



The following three of these less well-known varieties have so little in common 

 with any standard sort that a detailed comparison hardly seems justified; yet it 

 may be worth while to point out such similarities as are evident. Geant de' 

 Hedelfingen resembles Napoleon somewhat in size of leaf and in its smooth, 

 fine texture and dull leaf surface. Genesee and Napoleon are similar in leaf 

 size and shape, color of the young tip leaves, and amount of pubescence on the 

 petiole. Early Rivers is suggestive of Windsor in general habit of growth and 

 color of the one-year bark. 



The variety Schmidt has several so-called improved forms which are indis- 

 tinguishable from it as far as nursery characters are concerned; these include 

 Nelson and Eureka. However, Paul Rose, a light colored bud-sport, differs 

 from Schmidt in color of the young tip leaves, by showing practically no sign of 

 a reddish tinge at any time. 



DIFFERENCES BETWEEN SWEET AND SOUR CHERRY TREES 



Hedrick (3) in his key to cultivated species of cherries separates sweet and sour 

 cherries on the basis of leaf size, shape, and firmness. As a group, the leaves of 

 Sours are smaller, shorter, thicker, less folded, less drooping, darker green, with 

 more glossy surface, shorter tips, shorter and more slender petioles, smaller and 

 fewer glands, and finer serrations than those ol Sweets. In addition to the above 

 leaf differences, nursery trees of sour varieties are generally shorter, with more 

 slender branches, smaller buds, and darker brown one-year bark. One-year 

 trees of Sours are also more commonly branched than are those of the sweet 

 varieties. No experienced nurseryman would have any difficulty separating 

 these two types. 



