28 



22. A few of the Eureka lemon types that frequently occur as bud variations on a single 



tree. Corona, Cal. 



23. Branches of the Variegated Eureka lemon showing the characteristic markings of 



fruits, leaves, and young twigs. This strain originated as a branch mutation and 

 has been propagated through three bud generations. Corona, Cal. 



24. A Navel lemon found as a bud variation on a tree of the Eureka variety. Eseondido, 



Cal. 



25. Typical lemons of the Lisbon strain, the type of the Lisbon variety. Five other 



strains of this variety have been found as bud variations, recorded and propagated 

 during the bud selection work of the IT. S. Department of Agriculture. Corona,. 



Cal. 



26. Lisbon lemons showing pronounced variations occurring on a single tree of an inferior 



strain. Corona, Cal. 



27. A typical tree of the Shade Tree strain of the Eureka lemon. The trees of this strain 



are vigorous and rapid in growth but low in production and bear fruits of a low 

 grade. Corona, Cal. 



28. A young Eureka lemon tree of the Eureka strain. Note the productive condition of 



the tree and the fine type of fruit. Corona, Cal. 



29. Marsh grapefruit top-worked on an undesirable tree. Highgrove, Cal. 



30. Euby Blood oranges showing typical fruit and others from a branch mutation, showing- 



various stages of dryness, the most of the fruit being entirely dry. Nearby tree& 

 bore heavy crops which were all of the Dry strain. Corona, Cal. 



31. Branch from a Kuby Blood orange tree showing the occurrence of a Navel fruit as a 



bud variation. In this way the Bahian Navel orange is frequently found in 

 Brazil as bud mutations in trees of the Selecta variety. Corona, Cal. 



32. Thomson orange tree in which the entire upper part and right side are barren every 



season, the lower left portion bearing normally. Eiverside, Cal. 



33. Washington Navel orange orchards along the foothills, showing two orchards in which 



individual tree performance records were secured in the investigational work of the 

 TJ. S. Department of Agriculture. Highgrove, Cal. 



34. View in a Washington Navel orange orchard showing the method of grading, sizing,. 



weighing, and recording the production of individual trees in the investigation per- 

 formance record work of the U. S. Department of Agriculture. Highgrove, Cal. 



35. Typical flowers of the Washington strain and the Seedy strain of the Washington 



Navel orange. Note the abundance of pollen produced by the anthers of the- 

 Seedy strain, while the flowers of the Washington strain do not produce pollen. 

 Eiverside, Cal. 



36. View in an Eureka lemon tree, showing the type of fruit-bearing bud-wood advised 



for use in propagating from select parent trees. The leaves have been cut from 

 one twig in order to show its characteristics to better advantage. Corona, Cal. 



37. Citrus propagation: Cutting a bud from a typical bud-stick of fruit-bearing wood for 



insertion into the seedling stock. 



38. Citrus propagation: Steps in the budding of a citrus nursery tree (from left to right) : 



seedling stock; inverted T-shaped cut for bud; bud inserted; inserted bud wrapped 

 with waxed cloth; budding knife. Eiverside, Cal. 



39. View in a Washington Navel orange orchard, showing the method of securing com- 



mercial individual tree performance records in this 1500-acre planting. Highgrove,. 

 Cal. 



40. Two-year-old Eureka lemon nursery propagated from selected fruit-bearing bud-wood. 



showing the fine tree development and the early fruiting tendency. Eedlands, Cal. 



41. Eureka lemon tree, 2 years 9 months old, propagated from select performance record 



trees. Note fruitful condition and fine character of fruit. Claremont, Cal. 



