10 CITRUS FRUIT 8 AND THEIR CULTURE. 



sile. Figure 2. shows some of the different forms of citrus 

 leaves. A. represents the leaf of Citrus trifoliata. B. is 

 from a sketch of a sour orange leaf in which the wings 

 were enormously developed and leaflet-like, in fact, they 

 could well be regarded as leaflets. C. is the leaf of the pom- 

 elo, with large wings on the petiole. On the shaddock they 

 are frequently much larger than on the leaves of the pom- 

 elo. D. represents the sweet orange leaf, with smaller 

 wings, and E. the lemon, the petiole of which is always 

 wingless, so far as I have ever observed. The citrus with 

 wingless petioles are regarded as being farthest removed 

 from the ancestral type, 



