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Show The Anatomy as . ; “156 BookIV. 20. §. THE IWeftageot the Strings and Parenchymous Fibers together,is here made in the fame manner, as hath been defcribed in the “Anatomy of the Root, and Trunk + the former being in fome Sortas the Warp, the latter as the Woof of the Leaf. a1. §. And one Example we have (it may be more than one ) wherein Nature fhews, thoughnot a greater, yet a different Arts and that is the Palz-Net. For whereas in other Plats, the Webbis made betwixt the Ligvous-Sirings and the Fibers of the Parenchyma, onlyvi- fible through a Microfcope : here the faid Strings themfelves are Interwoven, and the Weftage apparent tothe bare Eye. Ofthefe PalmsNets or Sacks, there are feveral Sorts. manner, One of them is compofed in this It hath a Fivefold Series of Lignous Strings or Fibers. The greateft whereof fwell out above the reft; and like fo many Ribs, are obliquely produced on bothhands, foas to encompafs the Sack, Along each ofthefe Ribs, on the infide the sack , runs a fmmall Whitifh Lines being a Thread of Aer-Veféls growing thereto. Betwixt thefe Ribs or larger Strings, there are others muchle, Two or Three betwixt Rib and Rib, Parallelly interjected. On the infide, there is a Third Series, whichis alfo obliquely produced 5 but tranfverfly to the former. The Fourthand Fifth, confift of the fmalleft strings 5 not only Tranfverfly produced, but alfo Alternately, from the outfide to the infide of the Sack, @ vice verfa. By thefe twolaft, all the reft are moft elaborately woven into one entire and {trong piece of Work. CHAP. V. Generation. Ss 6 &) = N £vergreen, is one degree above a Plant whichis BASS S = AS FE of Leaves. 197 Bell, and fome others; the Under-Leaves, which differ in Shape from thereft, are all at firft formed in the Plume, before it begins to /pront; and the reft afterwards; That is tofay, that the former Leaves are all formed (out of sap from the Trunk ) with the Seed it elf and fo compofe one Principal Part thereof, Je. the Plame: the latter, not till after the Seed is fow'n, and fo the Plume fupply’d with Szp immediately from the Root. Which Sap, it feems, is fo far different from the former, as {ometimes to producea different Sort ofLeaves, 5. § SECONDLY,ofthe Buds of all Trees, and of PerenniStalks, it appears, That they confilt of a great number of Leaves, all perfectly formed tothe Centre ; where,notwithftanding,theyare fomnetimes, not half fo big asa Cheefe-Mite. So that all the Leaves which {tand upon a Branch or Cien of one whole Years Growth, were a@ually exiftent inthe Bud. It isalfo very obfervable, That although thefe Buds begin to be expanded nottill Spring, yet are they entirely Formed, as to all their Integral Parts, in the Autumn foregoing. So that the whole Stock of Leaves which grow upon a Tree, or any Per- ennial Stalk, this year; were made, or actually in being, the laft year. A greater Heat, more fubtilized Aer, and better concofted Jugce, being requifite for their Geveration, than for their bare Expanfion and Growth, 6. § LASTLY, ofall Azmual Plants, in which there are - veral Succeflive Generations of Buds, one under another in one year5 although I have not made the Remarque, yet am aptto believe, That as the Leaves in every Bud are all formed together, as in other Plants : fo likewife,that the Succeflive Generations of the Under-Buds, begin at certain ftated Terms: as in fome Plants, at every New Moox 3 in others, at the Full Moon; and in fome perhaps; with both, or every Fourt’night. Of the Duration of Leaves, and the Time of their BARSOC Book IV. fimply Perennial : of This,only the 77#7k and Buds live all the Winters of That, alfo the Expanded Leaves. And an Evergrow, is a degree above an Evergreen: here, the Buds and young Sprigs, do only /ve; there, theygrow and are put forth. 2. §. An Evergreen, is made fuch, either by nghnefs of the Skiz, and Cloféne/s or Denfity of the Parenchyma, wherebythe Leaf is better able to endure Cold 5 as in Holy: or by the extream Smalnefs or Fewne/s of the Aer-Veffels, whereby the Sapis lefs dryed up, and fo fufficient, even in Winter, for the Nourifhment of the Leaf; asin Box, and Yew, as alfo Fir, and all Refiniferous Plants. 3. §. The perpetual Growth of a Plant, feemeth to depend chiefly onthe Nature ofthe Sap. Forall Fayces willnot ferment alike, nor with the fame degree of Heat. So that whereas many Plants require a greater Heat, as that ofSummer, for the fermenting anddiftribution of their Juyces,and fo their growth; the Warmth of Spring is fufficient for manyothers; and for fome few, that of Winter it felf. 4. § AS TO the Time whereinthe Leaves are formed; Firft, it is very probable, That in thofe Plants which have Leaves ( befides the Diffimilar) of Two diftin& Figures, as hath the Little Common Bell, CHAP. VIL. Of the Mannerof the Generation of the Leaf. Where alfo, that of the Two General Parts of @ Plant, fc. the Lignous and Parenchymous, is further explain’d. seed HE Vifible Caufes of the Figures of Leaves, have Bx, Ch, 4. \F been formerly mentioned. It may here be further noted, That the greater Fibers of the 5 3 Leaf, being never Braced in the Stak; itis a ex) goodpreparative for their better {preading in esa) the Leaf. As alfo, that the fame is much favour'd, by the extream {malnefs of the Aer-Veffels hereBy; in: whereby they are moreeafily divaricated,in os theleffer Fzbers, and fo the Leafdilated. . § BUT theft and the likeare to be reckoned a fecondary Order of Caufés 5 which ferve rather to carry on and improve,that which Nature hath once begun. And therefore, we muft not only confider [4ea, $.53. the vifible Mechamifm of the Parts; but alfo the Principles of which they are compofed; wherewith, Nature feems to draw her firft Strokes. a8; asi Lill |
