IDENTIFICATION OF CHERRY VARIETIES 7 



e\idence. With Windsor and Gov. Wood the petiole starts out at a moderate 

 angle but curves so as to put the leaf in a spreading position in Windsor and a 

 somewhat drooping position in Gov. Wood. Windsor leaves are saucer-folded, 

 while those of Gov. Wood are rolled. A third comparison as to leaf pose which 

 seems worth while is that of Black Tartarian and Rockport. Unfortunately, the 

 Black Tartarian shoot in Figure 9 does not show leaf size and pose so well as does 

 the tree in Figure 1. In this variety, since the petiole angle is only moderate, the 

 leaf position of spreading to drooping is due chiefly to reflexion at the point of 

 junction between the petiole and midrib. The tip of the midrib is also somewhat 

 reflexed. The leaf itself is saucer-folded. Rockport represents the extreme in 

 drooping leaves, many of them hanging almost straight down. Its petiole angle 

 is wide, while the petiole itself is curved and the midrib is reflexed somewhat at 

 the base and noticeably at the tip. Its leaf is rather broadly folded and coarsely 

 waved (Figure 9). 



In the foregoing pages, an effort has been made to list as many as possible of 

 the ways in which \-arieties differ. Some of these dift'erences are readily seen while 

 others are not so evident. Furthermore, under one set of growing conditions 

 certain differences will be found to be the most valuable ones for separating a 

 mixture; while under other conditions or at a different period in the growing 

 season, differences which were less evident in the first instance may become the 

 most important ones. 



VARIETY COMPARISONS 



From the standpoint of separating possible mixtures in a nursery row, it is 

 most important to know the particular differences between varieties which are 

 similar or likely to be mixed. In some instances these differences are so pro- 

 nounced that one wonders why such a mixture should persist at all, while in a 

 few cases the characters which may be used to differentiate two varieties are very 

 few and the differences small. Many of the following comparisons are between 

 varieties which actually have been found mi.xed in commercial nurseries, some of 

 them quite frequently. 



A. Standard or Older Varieties 



1. Gov. Wood Windsor 



Habit of growth . Upright-spreading, taller Spreading 



Bark (2 year) Dark reddish brown Light pinkish brown 



(1 year) Reddish brown with abundant Light pinkish brown with 



scarf-skin little scarf-skin 



Lenticels Fairly numerous, elongated. Rather few, small, round 



more raised 



Petiole Longer, redder, heavy Moderate pubescence 



pubescence 



Glands More numerous, larger, darker 



red 



Leaf Long, narrow Rather short, broad 



Base Rather narrow, slightly cordate Distinctly cordate and full 



Margin Waved Even 



Folding U-folded, rolled, and drooping Saucer-folded 



Surface Fairly smooth Pebbled and puckered 



along midrib 



Serrations Coarse, rather pointed Finer, more rounded 



Mildew \'ery little, if any Susceptible 



Young leaves up to half-grown are lighter green on Gov. Wood 



