/ 



I 



3. 



^efur 



e 



e 





^^> as 

 with 



:a th 



e 



curled 

 over, 



not 

 medi- 

 f the 

 it the 

 es on 

 f Dri 

 moid 



)n 



the 



}ylea, 



lutea, 



und- 



D 



tmia 



» 



V 



hich 

 upon 



) 



perly 



with 



; ova- 



3d, i« 



ver 



,fthe 



Sect. III. I. 3 



UMBILICAL VESSELS 



,\ 



2^3 



\ 



d is inferted near or into th 



heart of the feed 



here the livino- principle refides, and affords not only pref( 



the vegetable embryon, b 



alfo fecretes the farinaceou 



oily materials for its future nourishment, which conftitute the cotyle- 

 dons of the feed. 



But the veflels, which maybe properly called umbiUcal, pafs from 



the heart or corculum of the feed, which is th 



D 



embryon of 



the future plant, into the feed-lobes, commonly called cotyledons, and 

 imbibe from thence a folution of the farinaceous or oily matter there 



depofited for the nutriment of the new vegetabl 



Thefe vt^^ 



/ 



delineated in their magnified appearance by Dr. Grew, Plate LXXIX. 

 fol. edition, and are by him termed feminal roots. See Plate I. Fig. I. 

 Thefe umbilical velTels probably confifl of a fyftem of abforbents, 

 which fupply nutriment to the embryon plant from the cotyledons 

 of the feed, and alfo of a fyftem of placental arteries and veins fpread 

 on the humid membrane, which covers the cotyledons, and is moif- 

 tened by its contaft with the earth, for the purpofe of oxygenating 



many plants 



the vegetable blood 



Th 



idea is countenanced 



b 



O O 



P 



their cotyledons, or feed-lobes, out of the ground 



the air, which are then converted 



and perform the ofEc 



of luno-s, after they have given up beneath the foil the nutriment, 

 which they previoufly contained, as in the young kidney-bean, pha- 



feol 



fo the white corol of the helleborus niger, ehriftmas rofe 



chano-ed into a green calyx by loofing one fyftem of arteries after the 

 impregnation of the feeds 



The feed-embryon therefore refembles the chick in the eg 



firft 



& 



as when vivified by the influence of external warmth they both be 

 their <^rowth by the abforbent fyftem of veflels being ftimulated int( 

 adion by their adapted nutriment; and the fluids thus pufhed for 

 wards ftimulate into adion the other parts of the fyftem, confift 

 firft principally of arteries and glands. 



Secondly, they feem t'9>refemble each other in their poflTefTii 



£3 



O 



of 



'■ * 



