July IS. 1919 Relation between the Flowers and Fruits of the Lemon 155 



A survey of this table and of figure i shows that there are two periods 

 in the year at which fruit buds were principally produced. In round 

 numbers, about 66 per cent of the buds appeared in March and April, 

 about 13 per cent appeared in November, and 20 per cent between April 

 and November. There was, therefore, a very pronounced seasonal dis- 

 tribution of fruit buds on the trees observed. 



Jan. Feb. AAar. Aj^r. ^\o\( June July A^S- 5ept. Ott Nov/. Dec.^ 



Fig. I. — Average monthly production of lemon buds during the year. 



The appearance of large numbers of fruit buds in March and April is 

 undoubtedly related to the greater activity of the tree, following its 

 slower winter growth. The secondary maximum in November, following 

 the last growth cycle of the tree for the season, is not so easy of explana- 

 tion. It might be assumed that the appearance of buds at this time was 

 a reaction to the large supply of elaborated food material in the tree 



