184 



FLORA OF JAM AH 'A 



dim* 



Flowers hermaphrodite, often also with male flowers, sweet- 

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

 paniculate. 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. 59. Citrus Aurantium L. 



A, Shoot with leaves and flowers X . D, Fruit cut across x L 



B, Flower cut lengthwise, with petals cut E, Seed X . 



X H. 

 r. Ovary cut across, much enlarged. 



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 

 and often spontaneous in tropical and subtropical regions. 



