CITRUS RELATIONSHIPS. 



we have a representation of the leaves 

 of JEgle Marmelos Correa., another 

 native Indian tree. The leaves are 

 deciduous, trifoliate and accompanied 

 by spines. 



It is generally believed that all 

 citrus are descended from an original 

 form having a three-parted leaf. Bon- 

 avia, however, takes the opposite 

 view, and thinks that they originated 

 from a simple leaved form, because in 

 young plants the first leaves produced 

 are simple and not articulated. In the 

 trifoliate orange the first leaves are 

 mere bracts and not leaves. The au- 

 thor inclines to the former view, that 

 our citrus fruits originated from a pri- 

 mal, three-leaved form, and certain it 

 is, that Citrus trifoliata L., as culti- 

 vated in America to-day, is closer to 

 the wild type than any other species 

 or variety known to citrus cultur- 

 ists. Occasionally, on this plant, 

 unifoliate leaves have been noted. One 

 of these is indistinctly shown in the 

 upper right hand side of Figure 7. On 

 the other hand, trifoliate leaves are 

 sometimes found on other citrus, and 

 the flanges or wings on the side of the 

 petiole of the sour orange, pomelo and 

 other citrus fruits are, in all probabil- 

 ity, the remnant of the lateral leaflets, 

 now greatly reduced in size and ses- 



Fig. 2. Citrus leaves. A, 

 Trifoliate orange. B, Sour 

 (Freak). C, Pomelo. D, 

 Sweet orange. E, Lemon. 

 Two-fifths natural size. 



