medica, 

 joura. 



The Citron Group. 



var. Ba-^a. Lemon-citrons. 

 \b. Citron-lemons. 



C. medica, var. limomim 

 (Lemons proper). 



C. medica, var. 

 melo-lemons. 



(a. C. limonum vulgaris of 

 Risso (Malta, .Italian, 

 and Portugal lemons, 

 and varieties). 



b. Nepal lemons. 



c. Sweet lemons (not 



limes). C. Lumia of 

 Risso. 



Pum- (a. Sadaphal. 

 Attarra. 



.(a. 



\b. 



N.B. It is doubtful whether the latter (No. 4) 

 ought to be included in this group. 



For reasons stated elsewhere, I thought it better to 

 exclude from the C. medico, group the true limes (C. 

 acida of Roxburgh). 



From the citron proper to the lemon proper I have 

 found many gradations or intermediate forms, so that 

 the relationship is not difficult to trace. The most 

 useful, however, appears to be that form which, in 

 the hands of the cultivators of the south of Europe, 

 combined all the best qualities of a sour citrus, viz., 

 very aromatic and not too thick-skinned ; neither too 

 large, nor too small a fruit ; abundant and pure acid 

 juice ; and ease of propagation and cultivation. It 

 contains all the good qualities in one fruit, making it 

 the most desirable variety for general cultivation ; 

 hence its vulgarization, which, in other words, means 

 that it became very common. A good thing is always 

 in demand, and sooner or later it must become very 

 common, if it admit of easy propagation and cultiva- 

 tion. This variety is the Citrus limonum vulgaris of 

 Risso, the sour lemon of Europe, and may be some 



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