I 
150 CHAPTER II, 
time, many were newly introduced, and 
imperfedlly known. 
Parkinson's work is much more ex- 
tenfive than Johnson's, in the number of 
fubjeds defcribed, he having taken, as be- 
fore obferved, advantages which the Ema^ 
dilator of Gerard negleded. Many of 
the plants of /Egypt y from Pro/per Alpi- 
Nus, many of the North American, or Ca- 
nadian plants, from Cor nut us, and fome 
from Columna's work, are introduced. 
He neglecSed no opportunities of procuring 
new plants from abroad. The nature of 
his profeffion did not allow him to make 
diflant or frequent excurfions in Ejigland ; 
but, by the affiftance of his correfpondents, 
and fome of Lob el 's poflhumous writings, 
which he purchafed, he was enabled to en- 
large, not only the catalogue of Britifl> 
plants, but to introduce^any exotics be- 
fore unknown. 
Johnson had defcribed about 2850 
plants, Parkinson has near 3800. Thefe 
accumulations rendered the Thea- 
TRUM Eotanicum" the moft copious 
book on the fubied: in the En^liih Ian- 
