IOO EVOLUTION [Chap. II 



Letter 53 HOOKER— NEW ZEALAND. 



Genera with 4 species and up- I With 3 species and down- 

 wards, i'oVj. I wards, ftftrV- 



Godkon— Central France. 



With 5 species and upwards, A.',.",. 



With 3 species and downwards 



I do not enter into details on omitting introduced plants 

 and very varying genera, as Ruins, Salix, Rosa, etc., which 

 would make the result more in favour. 



I enjoyed seeing ilenslow extremely, though I was a 

 good way from well at the time. Farewell, my dear Hooker : 

 do not forget your visit here some time. 



L eUer 54 To J. D. Hooker. 



Down, Nov. 14th [1S57]. 



On Tuesday I will send off from London, whither I go 

 on that day, Ledebour's three remaining vols., Grisebach and 

 Cybele, i.e., all that I have, and most truly am I obliged to 

 you for them. I find the rule, as yet, of the species varying 

 most in the large genera universal, except in Miquel's very 

 brief and therefore imperfect list of the Holland flora, which 

 makes me very anxious to tabulate a fuller flora of Holland. 

 I shall remain in London till Friday morning, and if quite 

 convenient to send me two vols, of D.C. Prodrowus, I 

 could take them home and tabulate them. I should think 

 a vol. with a large best known natural family, and a vol. 

 with several small broken families would be best, always 

 supposing that the varieties are conspicuously marked in 

 both. Have you the volume published by Lowe on 

 Madeira? If so and if any varieties are marked I should 

 much like to see it, to see if I can make out anything about 

 habitats of vars. in so small an area — a point on which I have 

 become very curious. I fear there is no chance of your 

 possessing Forbes and Hancock British Shells, a grand work, 

 which I much wish to tabulate. 



Very many thanks for seed of Adlumia cirrhosa, which I 

 will carefully observe. My notice in the G. Ch. on Kidney 

 Beans l has brought me a curious letter from an intelligent 



1 " On the Agency of Bees in the Fertilisation of Papilionaceous 

 Flowers" (Gardeners' Chronicle, 1857, p. 725). 



