OCR Text |
Show | The Anatomy BookIL ——$—<——— Of the WOOD. @5 HAT Portion of the Root whichftandeth next within the Bargue, and in Trees, and Shrubby Plants, is the Wood 5 is alfo compounded of Two Subftantially different Bodies, Parenchy5 mons and Lignous. The Parenchymous, is of the fame Subftantial Nature with that of the Barque. And is originated from it 5 being not only adjacentto it, but all round about conti= nuous therewith; even as that, is with the Skins the Parenchyma of the Barque, being diftributed, from time to time, partly outward into the Skiw, and partly inward, Wood. into the 2. g. The Pofition of the feveral parts hereof, is different. For the moft part it hath a Diametral Continuation, in feveral Portions, running betwixt as many more of the Lignous, from the Circumference towardsthe Center of the Root: all together, conftituting that, which inthe second Chapter of the Firft Wook, I call the Infertment. Inthe Rosts of many Herbs, thefe Diametral or Inferted Portions are more obfervable, as in Cumfry 3 which leadeth to the notice of them in all others, both of Herbs and Trees. Sometimes part of this Paren- chymous Bodyis difpofed into Réngs,as in Fezil, The Number andSize of which Rings differ: In Femi, when the Root is grownlarge, they are in fome places broader, but fewer; in Beet they are narrower, but more. The Diametral Portions are here, in like manner, muchva- ried 5 in Cumfry, Celandine, larger; in Beet, Buglofs, meaner; in Borage, Parfzep, more, and fmaller 5 and in moft Woody-Roots, ftreaming betwixt the Pith and the Bargue, as fo many {mall Rays. Their Continuation is alfo different 5 in fome Roots, to the Centre, as in Colambine 5 in others not, as in Parfep, And fometimes different in the fame Root, as in the Vine. 3. §. The Contexture of thefe Parenchymous Portionsis fometimes Uniform, as in Buglofs, Peony; and fometimes alfo, as it is in the Barque, different; in part, more fappy, and tranfparent; in part, more white, dry, and aery, as in Carrot, Lovage, Scorzonera, and others; which yet cannot be obferved without a wary view. But their general Textureis the fame being all made up ofmany{mall BladWhichare hereofdifferent Sizes, like thofe of the Barque, but for the moft part fmaller. Their Shape likewife, is ufually Round ; but fometimes Oblong and Oval, asin Borage; or Oblong and Square, as in the Vine, 4.A §. The Lignous Part, ifnot always, yet ufually, is alfo CompoundedofTwo Kinds of Bodies, (cil, Succiferons or Lignous and AerVeffels. The Lignous as far as difcernable, are of the fame Conformation and Nature with thofe of the Barque, and in the tranfverfe cut of 5 WWW) lie etth |}, iH 1| | of Roots. of the Root, do oftentimes, as thofe, emit a Liguour. CHAP. W. ders. BookII. Theyare alfo Braced ; and manyof them runindiftinét Threds or Portions, collaterally together. 5. §. The der Veffels fo call, becaufe they containno Liquor, bnt an Aery Vapour. They are, more or lefs, vifible in all Roots, They may be diftinguifhed, to the bare Eye, fromthe Parenchymous Parts, by their Whiter Surface; and their ftanding more prominent, wheras thofe fhrink below the tranfverfe level of the Root, upon drying. They are frequently Conjugated divers of them together , fometimes fewer, and Tb. 10, for the moft part fingle, asin A/paragus 5 fometimes many, as in Hors: & 15. Radifh. And their Conjugations are alfo Braced, as the Threds of the Succiferous Veffels, But they are no where Inofculated: nor Twifted one aboutanother 3 but only Tangentor Collateral. Neither are they Ramified, the greater intolefs 5 but are all diftin@ly continued, as the Nerves in Animals, from one end of the Root to the other, 6. §. Their Braces, as thofe of the Succzferous Vefféls, are alfo of various number : in Ferufalem Artichoke, Cumfry, Scorzonera, morerare 5 in Borage, Burnet, more frequent 3 as by {tripping off the Barque of fuch Roots, whereit is eafily feparable, may be feen. And they often Tab. 6. vary in the fame Root, fo in Borage, Scorzonera, &c. they are more frequent in the Centre, and next the Barque, than in the Intermediate fpace, as by{plitting thofe Roots down the middle doth appear. They Tb.6 alfo vary fromthofe ofthe Succiferous Veffels 5 thofe being ufually more ~* frequent, as in Ferufaleme Artichoke, than thefe of the Aerial. 7. §. Betwixt thefe Braced Aer-Veffels, and the reft, which make the true Wood, run the Parenchymous Parts above defcribed 5 as they Tub. 6. do betwixt the Succiférous in the Bargue: and fo make up two Pieces of Net Work, wherofoneis thefilling up of the other. 8. §. The Pofition ofboth thefe Kinds ofVefels, is Various. The Succiferous or Lignous are fometimes pofited in diametral lines or porti- Wags ons ; as in the Viwe, and molt Trees, Sometimes, oppofitely to the ana] Aerial, asin Beet 5 each Ring herein being double, and made both of 7), ¢, Sap-and Aer-Veffels. g. §. In Nettle the Pofition is very peculiar, from whatit is in the Tab, 8, Roots of other Herbs , being curiously mixed 5 the succiferovs running erofs the Aerial, in feveral, viz. Five, Six, Seven, or more Rings. In Bryony the feveral Conjugations ofthe Aerial, are diftin@ly furrounded with the Succiferous. In Patience, the Succiferous are difpofed, Tab. 7 befides Rays, into manyfmall Rings, of different Sizes, fprinkled up and down, and not, as inother Roots having one common Centre 5 within divers whereof, the Aer-Veffels are included : efpecially within thofe which are drawn, not into Rivgs, but, as it were, into little ftragling Hedges. 10. §. That alfo of the Aer-Veffels, is Various and Elegant : efpe- cially inthe upper part of the Root. In Ammi, Lilium-non-bulbofom, they make a Ring. In thefe, a Prick’d-Ring; in Peony, a Ring of Rays; in Valerian, a Ring of Pricks and Rays. In others, they make Tab. 7,85 9. not Rings, but longer Rays, extended either towards the Centre, as in Scorzenera 5 or meeting init, as in Columbine. In the Common Dock, they ftand morein {ingle Rays: in the other Speczes of Decks, both in Rays, and collateral Conjugations between. DT9, |