( 



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142 



SEEDS, BUDS, BULBS. 



Sect. IX. 



S^c 



I. I 



it with a wire. Debarked oaks pullulate. Sap-juice in the alburnum, g. A 

 paufe in vegetation about midfummer. "Trees thenjecrete nutriment in their roots 

 md Jap-wood for the new buds. Are then bejl tranjplanted without lopping their 

 branches. 10. Caudexes of the buds form the barky whofe vejfels inofculate. Heart- 

 wood dies. Sap-wood a5fs as umbilical ve/fels^ and afterwards as capillary tubes^ 



€r as capillary Jyphons. 



II. 



Flower-buds perijh without increafing the bark by 



new caudexes. Are convertible into leaf -buds. Vegetable monjlers. 12. Central 

 fart of an adult hud. III. i. Bulbs. Leaf- bulbs precede flower- bulbs in 

 the tulip as leaf- buds in apple-trees y as joints in the ftalk of wheat. Solitary ge - 

 Tieration of infe5ls. 2. Bulbs of onions. Orchis. Tulip. Hyacinth. Ranun- 

 culus. Iris. 3. Roots of potatoes. Wires of ftrawberries. Seeds of orchis. 

 Flowers of potatoes. 4. Stem-bulbs on magical onions are ftmilar to root -bulbs. 

 5. Root-grafting. Root-inoculation. Root -propagation. Suckers of trees. Root- 

 buds of herbaceous plants. Internal parts of which decay. 6. Tuberous roots of 

 turnep and carrot are refervoirS of nutriment for the fucceeding flower -fern. No 

 flower-bud is ever produced from a feed without previous leaf -buds. Whyfeedling 

 iipple-trees are ten or twelve years before they bear fruit. Magazines of aliment 

 in almoft all roots. 7 . Ufe of the horfe-hoe to accumulate earth round the wheat- 

 plants. Wheat dropped on the foil fhoots up but oneflem. Covered with the foil 

 itfhoots up many. And tranfplanted deeper in the foil many more. Potatoes y vines^ 

 and figs y produce lateral roots from their joints. So does the bark if wounded cir^ 



cularly. 



Ufe of eating down forward wheat with fheep. 



* 



etable tg'g in the pericarp 



I. I. Having treated of the phyfiology, we now fl:ep forwards t< 

 confider the economy of vegetation, as far as it may ferve the pur 

 pofes of agriculture and gardening. 



After the produdion of the {^tdi^ or ve« 



of flowers, and its enfuing impregnation by the farina of the anthers 

 fhed upon the ftigma, a coagulated point appears on the feed-lobes 

 according to the obfervations of Spallanzani, like the cicatricula on 

 the yolk of the ^^^, 



The feed continues to grow in the pericarp fuftained 



fecretions from the vegetable blood, which is previoufly oxygenated 



adapted 



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