THE ORANGE IN CALIFORNIA — VARIETIES. 



49 



THE ORANGE. 



THE SWEET ORANGE. 



Citrus aurantium dulces, Linn. 



The sweet orange belongs to the natural order Aurantiacee, 

 and the origin of the different members of this citrus family 



A. Compound unifoliate leaf of the orange (Cti- 

 rus aurantium). 1. Point of union, marked by an 

 articulation; 2. Petiole, winged on either side; 

 3. Lamina; 4. Flowering branch of Citrus bigaradia; 

 Sand 6. The fruit; 7. Flower complete; 8. Pistil; 

 9. Transverse section of ovary. (After Haldane.) 



is extremely doubtful, having been cultivated from a remote 

 period of antiquity, but is supposed to belong originally to 



China and India. 

 4c 



