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Motion of the Stalk, alfe Deftendss and fo, according to the dura- 
blenefS of its Subftance, becomesa fhorter or longer Root 5 the Elder 
or Lower Portion thereof, Rotting off, by the fame Degrees with 
the Generation of the Upper, out of the Stalk. So in Brownwort, the 
Bafis of the stalk finking down by degrees , till it lies under Ground, 
becomes the upper part of the Root; and continuing {till to fink, 
the next year, becomes the lower Part, and the next after that, rots 
away ;.anew Addition being {till yearly made out of the Stalk, as 
Tab. 5. f: 6 the elder Parts yearly rot away. Soin Drago, Crocws, and the like, 
© 7. where the Root isdouble 5 the Bafis of the Stalk, this year; the next, 
becomes the Upper-Root ; after that, the Lower-Root; and’ at the 
length dies and 1s confum’d. 
14. §. The Demonftration hereof, is taken, more evidently, from 
fome Roots, than from others; us from the Level and Knobed Roots 
a 5 fof Wood-forrel, Primrofé, &c. For the Leaves of thofe Plants rotting off 
’ fucceffively, and the Ba/és of thofe Leaves gradually defcending into the 
Grounds each Bafis is thus nourifhed with a more copious Sap, and fo 
{welled into fo many thick Kvots. Tt may likewife be gather'd in 
fome, from the like Pofition of the Vefels or Woody Parts, in the Root, 
Th as in the Trak 5 as in Bares-foot, Asalfo, fromthe Root of the Iris 
a” 5: ft  Tyberofas where, although the Leaves fall off clofe to the Surface of 
the Stalk; yet after that is funk down, and {well’d into ‘a Root, the 
Seats of the perifhed Leaves, and the Ends of the Vefels belonging to 
them, are not obfcurely vifible; whereby the Root 1s wrought, as it 
were, with feveral Seames and Prickt-Lines; the Seams fhewing the 
fetting on of the Leaves 5 and the Pricks, the Terminations or broken 
Ends of the Veféls: which ends, are {till more apparent, upon the 
{tripping off the Barque. Iconfidered likewife, That as among Avi 
mals, there are many, which are not Bred of Eggs, immediately; but 
are Transformed, one Avimal into another : So, it is more than pro- 
bable, That among Plants, there are not a few Inftances of the like 
Transformations 5 whereof, this is one. 
15. §. The Caufe of this Decent, fo far as it is dependent on the 
Inward Conformation of the Root, I thall fhew in the following 
JPart. But the Immediate Vifible one, are the String-Roots, which 
this kind of Trwmks frequently put forth: which, defcending them- 
{elves direftly into the Ground, like fo many Ropes, lug the Trunk af- 
ter them. Hence the Tberous-Roots of Iris upon the rotting or fading 
away of the Strivg-Roots hanging atthem, fometimes a little Re-afcend. 
Hence alfo the Shape of fome Roots isInverted: For whereas moft are 
parted downwards, into feveral Legs; fome are parted upwards into 
Tab. 3-f.5 divers Necks, as Dandelyon, and others. Forthefe Roots fending forth 
“oat the top feveral Trwwk: Buds, the faid Buds facceffively put forth new, 
and caft their old Leaves and continually alfo making their Defcent, 
are at length formed into fo many Necks, of three, four, five, or more 
Inches long, under Ground. 


16. §. HENCE ALfo we underftand, in what particular way., 
fome Roots become Perennial. Some are wholly fo; as thofe of Trees, 
Shrubs, and divers: other woody Plants, Others, in part, or by a 
new Progenies of Roots, from the old Head or Body, in the room of 
thofe that die yearly, or after a certain Time 3 .as of Lélinaz non bulbo- 
filtt, 

