RUTACEiE 



481 



stand in the syrup for about a month, and subsequently 

 boiled in a pure sugar syrup. 



CITRUS LIMONIA (Lemon) 



Description.-^The lemon tree is small, from 10 to 20 feet in 

 height, with short, stout thorns; the leaves are 2 to 3 inches 

 long, long-ovate, sharp-pointed, serrate, and its petioles 

 wingless; the large flowers are axillary, usually sohtary, 



Fig. 203. — A citrus orchard in Southern California (From Calif. Agr. Exp. 



Sta.) 



sometimes in small clusters; their petals are white inside, 

 and purplish above; the stamens are usually between 20 

 and 3c in number; the ovary has 7 to 10 locules. There are 

 three sorts of flowers in the lemon: (i) perfect flowers, (2) 

 flowers with rudimentary pistils and normal stamens, and 

 (3) ^flowers that fail to develop beyond the bud stage. The 

 first class is the only one to set fruit. The fruit is about 3 

 31 



