152 AN INTRODUCTION 
are annual with us will become ferennial or 
arborefcent ; as is found in Tropcolum, Beta, 
Majorana, Ma/va arborea, &c. And on the 
contrary, cold Regions will occafion peren- 
nial Plants to become axnua/; as is obferved 
in Ricinus, Mirabilis *, &c. ; 
MULTITUDE or Quantity, is an acci- 
dental Circumftance in Plants, and cannot 
conclude any Thing, whether the Increafe 
be of the P/ant itfelf, or of its Roots, Stems, 
Leaves, or Fruétification, 
PUBESCENCE is an uncertain Mark ; 
as by Culture and Change of Soil, Plants 
are fubject to lofe as well their Spznes as 
their Hair or Down. 
LEAVES, though they for the moft part 
furnifh moft elegant fpecific "Differences, | 
as has been obferved in the laft Chapter, are 
yet fubjed& to Luxuriation in the fame Spe- 
cies, which muft be carefully diflinguifhed, 
This may refpect their Oppo/tion and Com- 
pofition, and alfo their being crifp (curled) 
cr bullate (bladdery.) 
In refpect to Oppofition, oppofite Leaves 
will fometimes become ferz, guatern, or 
guine, growing by Threes, Fours, or Fives ; 
.and then the Stem alfo from quadrangular, 
* Ricinus and Afrabilis, are naturally perennial 
Plants, and are only killed by Froft in cold Countries. 
Square, 
