OCR Text |
Show The Anatomy Book I Next within this Part ftands the Ligzows Body : This Liglyeth with all its parts, fo far as theyare vifible, in a Cirvg. Yet are there divers extreme fmall Fibres thereto parallel, uftally mixed with theCortical Body and by the fomewhat different colour of the faid Cortical Body where they ftand, may be noted. Thefe Fibres the Cortical Bo } and Skin, altogether, properly make the Berque. The Original of this Lignous Body, as of the two former, is from the Seed 5 or, the Seminal Roots of both the Lobes, being united inthe Radicle, and with its Parenchyma co-extended, is here inthe Root of the Plant, the Lignows Body, ; . 8. §. The Contexture hereof, in manyof its parts, is much more clofe thanthat of the Cortical, and their Pores very different. For whereas thofe of the Corticalare infinitely numerous, thefe of the Ligwows are in comparifon nothing fo. But thefe, although fewer, yet are they, many of them, more open, fair and vifible: asina Logs thin Slice cut athwart the young Root of a Tree, and held up againft the light, is apparent. Yet not inall equally 5 in Coran-Tree, GoosberryTree, &e. le, in Oak, Plums, and efpecially Damajcens, more; in Elder, Vines, Gc. moft confpicuous. And as they are different in number andfize, fo alfo (whereon the numeroufnets of the Pores ofthe Cortical Body principally depends) in their fhape. For whereas thofe of theCortical Body are extended. muchalike both by the length and breadth of the Root ; thefe of the Lignous, are only by the length; which efpecially in Vives, and fome other Roots is evident. Of thefe Pores, ‘tis alfo obfervable, that althoughinall places of the Root they are vilible, yet moft fair and Open about the filamentows Extremities of fome Roots, where about, the Roots have no Pith; asin Fenil, And in many Roots, higher. . Theproportion betwixt this Lignows Body and the Cortical, 1s, aswasfatds yet in this, con{tant, Je. that in the filamentons nd {maller Parts ofthe Root, the Lignous Body is very much the lefs; running it. Wh aflender Wyer or Nerve through the other furrounding in the upper part, it is often times of far greater quan- tty than theCortical, although it be encompafs'd byit. They ftand both together pyramidally, which is moft common to Infant Roots, but alfotoa great manyothers. To. The next Part obfervable in the Root, is the Infertment. The exiltence hereof, fofar aswe can yet obferve, is fometimes inthe Radje Seed it {elf ; Tcannot fay always. As to its fubftantial nare more certain 5 that it is the fame with that of the Parexyaa of the Radicle, being always at leaft augmented, and fo, in part, inated from the Cortical Body, and fo, at fecond hand, from the faid nchyma. For in difle@ing a Root, I find, that the Cortical Body th not onlyenviron the Ligwous, but is alfo wedg'd, and in many Pieces inferted into it; and that the {aid inferted Pieces make not a meer Indenture, but tranfmit and fhoot themfelves quite through as *’ faras the Pith: which in a thinSlice cut athwart lines drawn fromthe Circumference towards the Root, as fo many the Center, fhew themfelves, It. §. The Pores of the Infertment are fometimes, at leaft,. exten| what more bythe breadth ofthe Root, about the top of of Borage maybe of Plants. the Cortical Body, which are extended by the length and breadth much like; and from thofe of the Lignous, being onlyby its length. 12. §. The number andfize of thefe Infertions are various, In Havthorn, and fome others, and efpeci ally Viloms, they are moft extream fmall 5 in Cherries and Plums they are Biger; and in the Vine Tab. = 2. and fome other Trees, very fairly appare nt. In the Reots of moft oo, Herbs they are genera fe 5 lly more ealily diftoverable 5 which may lead to the obfervation of theminall, 13. §. Thefe Infertions, although they are continuous through both the Jength and breadth of the Root ; yet by the feveral thootings of the Lignous Body notfo in all Parts, but they are frequently intercepted. For of the Lignous Body it is (here beft) obfervable 3 That its everal Shootings, betwixt which the Cortical is inferted, are not, throughout the Root, wholly diftin &, ftrait and parallel: but thatall along being enarch’d, the Liguous Body, breadth, is thus difpofed into Braces or Ofcula both in length and tions. Betwixt thefe feveral Shootings of the Lignows Body thus fhooting, and being alfo ofculated anfwerablyofculated, the Cortical Tab. Brace for Brace, that whichI call the Iufertment is framed thereo f. 14. §. Thefe Ofculations are fo made, that the Pores or Fibres of the Ligwows Body, I thinks, notwithftanding, feldom or never run one into another ; being, though conti guous, the fame manner as {ome ofthe Nerves, thoug yet ftill diftin@. In fome {pace are affociated together, yet ‘tis mofth they meet, and for probable, that none oftheir Fibres are truly inofculated,. faving perhap s, in the Plexures. 15. §. Thefe Ojeuiations of the Lignous Body, and fo the interception of the Ixfértions of the Cortical, are not to traverfe cut of the Root, but bytaking off be obferv'd hythe the gargue. In the Roots of Trees, they are generally obfcure; but in Herbs often more diftin&ty apparent; and efpecially in a Turne p: the appearance whereof, the Barque being {tripp'd off, is asa piece of work, fill’d up with the Infertions from thence clofe- wrought Net. 16. §. Thenext and laft diftin® part of the Root is the Pith. The fubftantial nature thereof, is, as was {aid ofthe Infertment, the fame likewife with that of the Parenchyma of the Seed. And according to the beft obfervation I have yet made, ’tis fomet imes exiftent in its Ra. dicle s in which, the two main Branch es of the and being ofculated together, are thus difpos Lobes both meeting, 'd into one round and tubular Trwxk, and fo environing part of the Parenchyma, make there: ofa Piths asineither the Radicle, or the young Root of the great Bean or Lupine, may, think, be well feen, 17. §. Butmany times the Original hereo the Barque. For in difle@ion ofdivers Roots, f is immediately from both as of Barberry or Mallows, it is obfervable, That of 7rees and Herbs, the Cortical Body and Pith, are both of them participant of the fame Colour ; in the Barber ry, both of them tinged yellow, and in Malow s, green. In cutting the fmaller Parts of the Roots of many Plants, as of Borage,Mallows, Parfley, Columbine, Ge. ‘tis alfo evident, That the Lignous Body is not there, in the leaft Concave, but ftandeth Solid, or in the Center 5. and that the Infertions being gradua without any Pith, lly multiplied after- feen 3 and are thus different from thofe of wards, the Pith, at length, towards the thicker parts of the Hoot, thews and the the enlarges it felf Whence it appears, that in all fich Roots 7, 2. f. 3. |