148 $ The Anatomy z Book IV: 
= G HAP. -ik 
Of thofe things which appear upon the Surface 
of the Leaf. 
Str HESE are Globular Excrefcences, Spots, Hairs, 
[ZEN Thorns and Prickles: of all which, except Spots, 
I have fpoken in the Appendix to the Chapter of 
Leaves in the Firft Book, 
2 2. $. Ofthe Globulets, it may here be fur- 
22) ther noted, That thofe which are white, and lie 
í fometimes like a fine Powder upon the Leaf, 
# were once tranfparent, as in Bears-Eear ; their 
> ” cleer Liquor beeing now evaporated to anExtrai£ 
Tab. 43. OF White Flowers. This, iflicked off, will give you the Taft of the 
more Effential Gontent of the Plant 5, different from that perceived in 
chewing the Leaf. 
3. $. For the obferving of them, it may alfo be noted, That ale 
though they often grow on both fides the Leaf alike ; yet fometimes, 
as in Ground-Jvy, only or chiefly on the Back-Side. Andthat in many 
Plants,where the elder Leaves have none 5 on the young Buds they are 
very numerous 5 as in Coria Tree, Sorrel, and others, 
4. $. AS for spots, the fmaller ones are obfervable not only in 
St. Johns-worts, (in which Plant only they are commonly taken no- 
Tab. 43. tice OF ) but allo in Rue, Ground-Iuy, Pympernel or Anagallis, and 
divers other Plants, when held up againft the Light. The original 
whereof feems to be, at leaftin fome, from the Globulets above men- 
tioned; that is, when they break and dry away. So the Spots of Rue- 
Leaves,which in the Refledfion of Light look black ‚but upon the Trajetfi- 
on thereof are tranfparent , are fo many little Holes, pounced half way 
through the thickneß of the Leaf, and feem as made, by the breaking 
and drying away of as many Globulets. Whence alfo, as the Globulets 
are beft feen in the younger Leaves, fo thefe Spots in the elder. 
5. 5 BESIDES thefe, and fome others Ç as thofe in Ladies- 
‘Thifile) which are Natural to the Leaf; there are alfo fome, Spots, or 
Tab. 43. rather Streaks, which are Adventitious 5 asthofe in the Leaves of Sone 
59 chus. The Caufe whereof, is a (mall flat Infé, ofa grey Colour, and 
about ¿th of an Inch long. Which neither ranging in bredth, nor 
ftriking deep into the Leaf; eats fo much only as lies juft before it, | 
and fo runs {Cudding along betwixt the Skiz and the Pulp ofthe Leaf 5 
leaving a whitifh Streak behind it, where the Shiv is now loofe, as the 
meafure of its Voyage. 
6.-§. THE-Original and feveral kinds of Thorns, I have deferib'd N 
in the above faid Appendix. I only add, that the very Leaves of fome 
Plants, if they ftand till the fecond year, are changed into fo many 
Thorns, asin the Farz. 
