LABORATORY MANUAL OF HORTICULTURE 



the number of the lenticels. How does the Prunus americana 

 differ from the Prunus domestica and the Prunus triflora in these 

 respects ? Describe fully. 



b. Make a drawing, at least one inch in length, of both the 

 branch bud and the flower bud. Are the buds arranged on the 

 stem singly, or in clusters at the apex of a spur ? Count the buds 

 in each cluster, and note whether the number is constant or vari- 

 able. Describe a fruit spur, and note how it grows. What is the 

 direction of the growth ? Why is this ? Where do you find the 

 branch bud ? Has the position of the branch bud anything to do 

 with the direction of the growth in the spur ? 



4. Prunus hortulana includes the following varieties : More- 

 man, Wayland, World Beater, Golden Beauty, and several others. 



a. Secure branches from one of the above varieties, including 

 both fruit buds and branch buds. Make a drawing, four inches in 

 length, and natural size, to show a twig which has both kinds of 

 buds. Describe the color of the bark and the general appearance 

 of the lenticels. Note any differences from the preceding groups. 



b. Make an enlarged drawing of a fruit bud and a branch bud. 

 Describe how the buds are arranged. Are they larger or smaller 

 than those of the preceding groups ? Discuss. 



5. Prunus munsoniana includes the following varieties : Poole 

 Pride, Pottawattamie, Newman, Robinson, Sophie, Wild Goose. 



a. Make a drawing, natural size, and four inches in length, of a 

 twig, including flower buds and branch buds. How do these 

 buds differ from those of the preceding groups? Describe the 

 buds, the lenticels, and the color of the bark. 



b. Make an enlarged drawing, one inch in length, of a branch 

 bud and a flower bud. Draw a separate scale of each. How do 

 the scales differ ? Are the buds arranged singly or in groups ? 



Comparative study of the plums. Describe in detail the points 

 of difference between the branch buds and the flower buds in 

 each group. Which are arranged singly, and which are in clus- 

 ters? Count the ovules in at least ten different buds. Is the 

 number constant ? Describe any difference in the longitudinal 

 and the cross sections of the buds in the different groups. 



REFERENCES : 



Bailey, " The Pruning Book," pp. 21-29, 46-50. 



Goff, " Principles of Plant Culture," pp. 86-95. 



Paddock and Whipple, " Fruit Growing in Arid Regions," pp. 66-80. 



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