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^^^^^^^^^^ 



310 



LAWS OF VARIATION. 



Chap. XXIV 



of the sarae species, naturally growing at different altitudes 



certain extent accli- 



under different latitudes, become 



matised, as is proved by the different behaviour of their seed 



lings when raised in England 



In my ' Origin of 

 I have alluded to some cases, and I could add other 



One 



instance must suffice: Mr. Grigor, of Forres, 70 states that 

 seedlings of the Scotch fir (Pinus sylvestris), raised from seed 

 from the Continent and from the forests of Scotland differ 



much 



a 





The difference is perceptible in one-year-old, and 

 r o-year-old seedlings ; but the effects of the winl 



the second year's growth almost uniformly make those from 

 the Continent quite brown, and so damaged, that by the month 

 of March they are quite nnsaleable, while the plants from the 

 native Scotch pine, under the same treatment, and standing 

 alongside, although considerably shorter, are rather stouter and 

 quite green, so that the beds of the one can be known from the 



" other when seen from the distance of a mile, 

 facts have been observed with seedling larches 



Closely 



Hardy varieties would alone be valued or noticed in Europe; whilst 

 tender varieties, requiring more warmth, would generally be neglected; 

 but such occasionally arise. Thus Loudon 71 describes a Cornish variety 

 of the elm which is almost an evergreen, and of which the shoots are 

 often killed by the autumnal frosts, so that its timber is of little value. 

 Horticulturists know that some varieties are much more tender than 

 others : thus all the varieties of the broccoli are more tender than cab- 

 bages ; but there is much difference in this respect in the sub-varieties of 

 the broccoli ; the pink and purple kinds are a little hardier than the white 

 Cape broccoli, " but they are not to be depended on after the thermometer 

 " falls below 24° Fahr. : " the Walcheren broccoli is less tender than the 



3 several varieties which will stand much severer cold 

 sn. 72 Cauliflowers seed more freely in India than cab- 



Walcher 



bages. 



73 



with 



Queen of 



tender than various other seedlings . It may be presumed that all tender 

 varieties would succeed better under a climate warmer than ours. With 

 fruit-trees, it is well known that certain varieties, for instance of the 

 peach, stand forcing in a hot-house better than others ; and this shows 



70 < Gardener's Chron.,' 1865, p. 699. n Dr. Bonavia, < Keport of the Agn> 



J 1 'Arboretum et Fruticetum,' vol. Hort. Soc. of Oudh,' 1866. 

 in. p. 1376. 74 « Cottage Gardener,' I860, April 



72 Mr. Eobson, in * Journal of Horti- 24th p 57 

 culture,' 1861, p. 23. 



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