VEGETABLE STRUCTURE. 
145 
at the Crown. The outermofl: of thefe two Films which cover Its Veffels, 
and which is dark and rugged, breaks irregularly at that part, and the 
ends of abrupt VefTels are Teen a little beyond. The inner Film is paler, 
and it is carried fomething farther : it fplits like the firfl into irregular 
flakes j the principal of which make a kind of fcabbard for the embryo 
Leaf. 
This rifes from a fmall point on the furface of the Flefliy Subflance of 
the Root ; which puthing outward, at length forms a Rudiment of a re- 
gular Leaf, faint and yellow in colour ; which fliooting above the ground, 
is covered at its bafe by this fcabbard. 
Its Stalk is formed of the Blea, or third fubflance of the Root, cover- 
ed with the inner Rind } fo that it has two Coats ; the outer one very thin, 
and green ; the inner thicker, and whitifli. The Flefliy Subflance of the 
Root purfues its courfe entire under the bafe of this Footflalk ; but it fends 
up into it a fmall tubular portion, as in the Seed-Leaves of the Radifh i 
which dividing into fix parts, covers fo many Conic Cluflers of large and 
firm Veffels, of the fame yellowifli green colour, Thefe are carried up 
at diftances within the hollow of the Footflalk; and that hollow is then 
filled up between them by a kind of Pith : this is not continued from the 
Pith of the Root, for the courfe of the Flefhy Subflance cuts off all pof- 
fible communication of that kind; but is formed originally from this Flefhy 
Subflance at the bafe, as the Pith of the Root was ; being truly the white 
part of thefe Cluflers of Veffels. The firft Pith is formed of fmall Vef- 
fels, flaot inwards from the Flefliy Subflance of the Root; and this of the 
Leaf-Stem is formed of the fame kind of Veffels which the fame fub- 
ftance fends, outward and upward, in that part where it is divefled of its 
Blea, and Bark, by the Shoot of this hollow Footflalk, which is formed 
of them, and fo far taken their place. Where they cover this Flefliy Sub- 
flance, they have been formed from it, by extravafated Juices ; and in the 
fame manner where a tubular Footflalk of a Leaf is formed, this Pith 
rifes upwards within it, making a kind of foft bed for the fix great cluf- 
ters of Veffels. It is lent up in the fame manner as fap will rife from the 
flump of a Birch-tree up the nofe of a tin funnel, till it fills the whole 
hollow ; altho’ the funnel be raifed perpendicularly upon it. Thefe Veffels 
of the Pith are nothing more than fmall flreams of the Juice, whofe fur- 
face has hardened : they arife cylindrical ; but their fides fqueezing one 
another, they become in the end fomewhat hexagonal. 
Thus the Flelhy Subflance of the Root is alfo the effential part of the 
Footflalk : for the fix cluflers of Veffels are formed within, and covered 
VoL. I. U by 
