THE SHORES OF BRITAIN, 49 
guard against this, the ordinary mode of attachment 
to the rock would be insufficient; and, instead of 
the primary root, the base of the stem is swollen out 
into a large hollow bulb, the extended surface of 
which putting forth powerful rootlets from every 
Tar Sea-Fursevows (Laminaria bulbosa). 
? 
part enables the plant to defy the violence of the 
winter storm. It is a fact worthy of our notice and 
admiration, that nothing of the kind takes place 
while the plant is young and small; it is only when 
it acquires size and weight, or, in other words, it is 
only when additional support becomes needful, that 
this extraordinary but most effective contrivance is 
resorted to. The English name of the species is 
4 E 
