LABORATORY MANUAL OF HORTICULTURE 



3. Make a longitudinal section of a cane, through a node, and 

 show by a drawing the internal structure. Label the pith, bark, 

 and wood. What proportion does the bark bear to the pith ? 

 Can you locate the diaphragm which is found at the node, after 

 a longitudinal section of the cane is made ? Label. Describe. 



Vitis vinifera. Varieties suggested for study : Black Hamburg, 

 Tokay, and Malaga. 



1. Secure canes from one of the above varieties, and study them 

 critically. Make a drawing, natural size, of a cane, including at 

 least two buds. Describe the buds and the bark. Make a draw- 

 ing, at least one inch in length, of a bud. Describe the difference 

 between the labrusca and the vinifera. What differences do you 

 observe in the bud and the cane of each ? Where are the vinifera 

 types of grapes grown ? 



2. Make a longitudinal section of a cane, showing the dia- 

 phragm. Does the diaphragm of the vinifera differ from that of 

 the labrusca ? Describe. 



Vitis labrusca x vinifera. Varieties suggested for study: 

 Brighton, Campbell Early, Catawba, Diamond, Essex, Goethe, 

 Hartford, Herbert, lona, Isabella, Lady Washington, Jefferson, 

 Woodruff. 



This group includes many good varieties of grapes which 

 have originated by the crossing of the vinifera with the labrusca. 

 The characteristics are derived from both of the parents, but 

 some varieties show more characteristics from the male, others 

 more from the female. 



1. Secure canes from one or more of the above varieties, and 

 study carefully. Make a drawing of a cane, including at least 

 two buds. How do these buds differ from those of Vitis labrusca 

 and Vitis vinifera ? Can you see any resemblance to either 

 parent ? Study carefully, and note which parent they seem to 

 resemble the most. Make a drawing, at least one inch in length, 

 of a bud. Describe. 



2. Draw a longitudinal section of a cane, showing the dia- 

 phragm. Describe. Describe in detail the differences between the 

 Vitis labrusca, the Vitis vinifera, and the cross between the two. 



REFERENCES : 



Bulletin No. 193, California Agricultural Experiment Station. 

 Circular No. 16, New York Agricultural Experiment Station. 



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