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tribe, and of the fucus genus; it has it'k 
fpecifie name of vesiculous or bladdered, from 
the bladders which cover it's furface. If the 
leaves of this vegetable receive an injury or 
fraclure, while the plant is in a vigorous ftate, 
, abundance of young leaves are thrown out 
from the injured part; even if a fmall aperture 
be made in the middle of a leaf, a new one 
arifes from either fide of it. 
This fpecies of fiicus is frequently feen with 
black hairy tufts, like horfe-hair, which are 
commonly fuppofed to be a part of the plant; 
but this is not the cafe ; thefe tufts are diftinct 
vegetables of the conferva genus, which attach 
themfelves to the bladder fucus, and appear to 
belong to the plant itfelf. There are fome fpe- 
cies of fucus which perhaps, on further in- 
veftigation, may be found to partake more of 
the animal than of the vegetable kingdom, in 
the fame manner as the fea anemone ; which 
was believed, till lately, to belong to the lat- 
ter. The green fcum, which we fee on flag* 
nant water, and the green films on trees, are 
but juft now beginning to be properly in- 
quired into. In a courfe of years the whole 
clafs Cryptogamia muft undergo a different 
arrangement; and there is not any one of 
O the 
