OCR Text |
Show of Roots. Tab. 10, & fequent. Book II. its infufion in Water: that isto fay, It is a moft curious aeeee fine wrought Sponge. Thus much the Eye and oe may 1 oO wt "4. §. The Microfeope confirms the truth hereo > > L peta €y fhews, That thefe Poresare all, in a manner, are >in oa #3 ae and this Part, an Infinite Mafs of little Cells or Blade ae 2 id * D none of them, are Vifibly pervious from one into anot : 5 but eae 1s boundedwithinit felf. So that the Parenchyma of oe ia i much the fame thing, as to its Conformation, which Roe " sei Eggs is, asa fluid, or a piece of fine Manchet, as a es : Wee - ne Sides alfo of thefe Bladders are as tranfparent, as thofe o ater 5 or > Bodie me Infects. es 2, eed Size is ufually much fmaller 5 and their ro Regular than thofe in Bread or Water, In all Roots Dy are he L as{carcely, without the Microfcope, to be difcerned: yet are t ey different Size, both in the fame, and in divers Roots; the ni whereof, amongft all Roots, may be reduced to ie e a ve 7 a0 accordingto the Stavdard, in Tab. 11. Some of thofe in Dandelion, 13 14 ‘"??"™ being of the Smalleft 5 and in Buglofs,of the Greateft. They are pofied, for the moft part, at an Equal Height 5 and piled evenly one over nied ue oftentimes ? they vifibly run in Ranksor trains, Tab. 14. both bythe length and breadth of the Roots,as in the Root of Buglofs,or of Dandelion, {plit through the middle, may be feen, Although they are ufually Spherical, yet fometimes, and in fome places, they are more oblonge, as inthe outward part ofthe Barque of Buglo/s. Thefe Bladders, are fornetimes beft feen, after the Roof, being cut traverfe, hath layn y awhile, to dry. cane : = 6. pli Theyare the Receptacles of Liquor; which is ever Lucid 5 and I think, always more Thin or Watery. They are, in all SeedRoots, filled herewith; and ufually, in thofe alfo which are well 1, as of Borage, Radifh, &c. ; ee “THIS Poche Part, inmany Roots, is of one Uniform Contexture 5 as in Afparagus, Horf-Radifp, Peony, Potato, and others. In manyothers, it 1s, as it were, of a Diverfified Woof’, the Bladders being, though every where Regular, yet either in Shape, Size, or Situation, different infome Parts hereof, from whattheyare, in other intermediate ones. For thefe Parts, are like fo many White Rays, {treaming, by the Diameter ofthe Root, from the inward Edge toward the Circumference of the Barque 5 asin Lovage, Melilot, Parfnep, &e. cut tranfverlly, is apparent. They are, though notin direct Lines, continued alfo by the length of the Root; fo that they are, as it were, fo many Membrances,by which the other Parts of the Barque,are difterminated. ; : 8. §. The Continuation of thefe Diametral Rays, or Portions, is divers : fometimes, but half through the Barque, or fomewhat more, or lefS, as in Melilot. Andit is probable, that to the Roots ofall or moft Trefoyls, andalfo of the Leguminous Kind, this is proper, To have thetr Diametral Rays come fhort of the Circumference, Sometimes, they run quite through to the very Skim, as in Lovage. And 1 think, ithe Roots of all Umbelliferous Plants : In which therefore, the Sh” {eems to have a clofer Communion with the Diametral Rays, and to be originatedefpecially therefrom. They ufually ftand at an Equal Diftance in the fame Root: But with refpe& to divers Roots, ee BTice of Roots. a {tance varies; {0lef, in Parfnep, greater in Buglofs. The y are commonly Tizb.7, 8 Redtilinear, as in Lovage ; but fometimes winding to and fro, as in a Carrot. 9. §. They are not always of one Size: in a Carrot near the Inner Edge of the Barque, exceeding Slende r, ble 5 in others, Thicker, as in the Three greate and fearcely difcernar ones of Melilot, and incommon Chervil. Both by their Diftan ce, and Size, they are alfo lefS or more Numerous ; fome, only as theyar e nearer; fome,as {maller 5 others, asboth. And ‘tis Proper, I think, to the Jntybous kind, either to havenone, or but a few. Somet imes they are of the fame Thicknefs quite through the Barque from edge to edge, as in Ma Mallow. And fometimes are confiderably rf- Tab. 7. {pread ordilated as they aproach the Shiv, wherewith they are joyned , more vifibly run, as in Parfley, or the -{malle and whereinto they r part of the Root of Lovage. And in fome Roots, as of Scorzo nera, at fome times of the Tab.8. year, whenlefs fucculent, almoft the whole Parenchyma feems to be of the Nature of the Diametral Rays, in other Roots. The pladders of thefe Diametral Portions, are fometimes, greate r than thofe of the other Parenchymous Parts, as in Parfley; and 1 think fometi mes lef. Yet as there, fo here, varioufly fized; to about fix or eight Degrees; and thofe of Parfley about the third, fourth, and fifth. Their Figure is Sometimes more oblong; and their direct ion or re{pect more towards the Centerofthe Root. 11. §. As the other Parenchymous Parts of the Barque, ate the Receptacles of Liquors fo thefe, (where they are) of Aer. This is argued, From their being more White, and not Tranfparent, as fuch Roots and Parts ule to be, which are more copiou fly and equally filled up with Lignor : as the Pith of Elder, which,i n the old Stalks, is White 5 was once, and by being well foaked , will become, again Tranfparent. And fromtheir being more dry and voyd of Liquor 3 whereupon their Bladders, which cannot be Vacuities, mutt be filled with more or lef§ Aer, mixed with the Sap or the Vaporo us parts thereof} This is more obfervable in thofe Diametral Portio ns, which terminate upon, and run into the Skiz, 12. §. THE BARQUE is not only of a divers Woof, but as is faid, of a Compounded Subftance ; there being a certain number of Lignous Veffels, fewer or more, in fome place or other, mixed with the Parenchymous Part above defcribed ; and fome way or other, are demonftrable in all Roots As by the Toughnefs of the Barque, when pulled bythe length. By the vilible Continuation of the faid Vefels through thelength of the Barque, in the refemblance of {mall Threds: Tab, 6, And bythe rifing up of the Sap in the traverfe cut of fuch places of the Barque, where thefe Threds terminat the Root, in e : as iftence of the fame Vefélsin the Skin, was proved in the the exPrecédent Chapter. 13. Thefe Tubulary Threds, run not through the Bargue in diret lines 3 but are frequently Braced together in the form of NetWork; The Parenchymous Parts every where filling up the fpaces be- Tab. 6. twixt the Braced Threds; as in Burnet, Scorzonera, &e, the Barque being paired orftriped off, is apparent. 14. § |