184 



FLORA OF JAMAICA 



Citrus 



Flowers hermaphrodite, often also with male flowers, sweet- 

 smelling, axillary, solitary, clustered, racemose, or shortly 

 panicvilate. Calyx shallow-cup-shaped, 3-5-toothed. Petals 

 4-8, free, linear-oblong, thick, imbricate. Stamens 20-60, 

 variously united, sometimes into several bundles. Disk large, 

 supporting the ovary. Ovary with several cells ; ovules 4- 8 in 

 2 rows in each cell. Fruit baccate, large, of several sections. 



Fig. 69. — Citrus Aurantium L. 



A, Shoot with leaves and flowers X «• 



B, Flower cut lengthwise, with petals cut 



X 1*. 



C, Ovary cut across, much enlarged. 



D, Fruit cut across X «. 

 B, Seed x §. 



F, Seed cut lengthwise, showing cotyle- 

 dons X 2. 



the coverings of the sections membranous or leathery, the 

 sections filled with transverse juicy cells. Seeds few in each 

 section, horizontal or pendulous, sometimes with 2 or several 

 embryos, without endosperm ; cotyledons fleshy, flat-convex, 

 often unequal. 



Species 40 to 50, natives of southern Asia, but cultivated 

 an(J often spontaneous in tropical and subtropical regions. 



