Book L of Plants. 
33 
19. $. Another ufe is for Augmentation 5 or, the capacity for 
the due fpreadingand ampliation of a Tree or other Plazt , are its, 
Leaves. For herein the Lignons Body being divided into fmall Fibres’ 
and thefé running all along their lax and fpongie Parenchyma; they 
are thus a Body fit forthe imbibition of Sap, and e : Growth, Now 
the Sap having a free reception into the Leaves, it {till gives way to 
the next fucceeding in the Branches and Trunk, and the voyding 
of the Sap in thefe, forthe mounting of that in the Root, and ingrefs 
of that in the Ground. But were there no Leaves to make a free 
reception of Sap, it muft be needs be ftagnant in all the Parts to the 
Root, and fo the Root being clogg'd, its fermenting and other Offices 
will be voyded, and fo the due Growth of the whole. As in the mo- 
tion of a Watch, although the original term thereof be the Spring, yet, 
the capacity for its continuance in a due meafure throughout all the 
Wheels, is the free and cafie motion of the Ballance, 
20. $. Laftly, As the Leaves fublerve the more copious advance- 
ment, lo thehigher purity of the Sap. For this being well fermen- 
ted both in the Root, and in its Afcent through the Trek, and 
fo its Parts prepard to a farther feparation ; the grofler ones are 
{till depofited into the Leaves 5 the more elaborate and effential only 
thus füpplied to the Flower, Fruit and Seed, as their convenient Al- 
ment. Whence it is, that where the Flowers are many and large, in- 
to which the more odorous Particles are copioufly recciv'd, the green 
Leaves have little or no fmell ; as thofe of Rofe-tree, Carnations, French- 
Marigold, Wood-bind, Tulips, &c. But on the contrary, where the 
Flowers are none, or fall, the green Leaves themfelve are likewife of 
a ftrong favour 5 as thofe of Wormwood, Tanfie, Baum, Mint, Rue, 
Geraninza Mofehatum, Angelica, and others, 
An Appendix, 
Of Thorns, Hairs and Globulets. 
Ti are of two kinds, Lignous and Cortical. Of the firft are 
fuch as thofe of the Hawthorn, and are conftituted of all the 
fame fubftantial Parts whereof the Germen or Bud it flf, andin a 
like proportion: which alfo in their Infancy are fet with the refem- 
blances of divers minute Le. Ofaffinity with thefe are the Spinets 
or Thorny Prickles upon the Edges and Tops of divers Leaves, as of 
Barbery, Holly, Thifile, Furze, and others 5 all which I think are the 
filamentous extremities of the Lignons Body fhcathed in the Skin. But 
this principal differnce betwixt a Bud and thefe Lignous Thorns, isobs 
fervable 5 That the Bud hath its Original from the Inner part of the 
Lignous Body, next the Pith: But thele Thorns, from the outer, and 
Tels fecund Part; and fo produceth no Leaves, but is, as it were, the 
Mola of a Bud, 
L ag 
