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CHAPTER IV. 
OF NOMENCLATURE AND TERMINOLOGY. 
The following are the canons instituted by Linnaeus, with 
reference to this subject. They are what guide the botanist 
in his doubts ; and, although exceptionable in some points, as 
will hereafter appear, are, upon the whole, well deserving of 
attention and respect. 
1 . The names of plants are of two kinds ; those of the class 
and order, which are understood; and of the genus and species, 
which are expressed. The name of the class and order never 
enter into the denominations of a plant. 
2. All plants agreeing in genus, are to have the same 
generic name. 
3. All plants differing in genus, are to have a distinct ge- 
neric name. 
4. Each generic name must be single. 
5. Two different genera cannot be designated by the same 
name. 
6. It is the business of those who distinguish new genera 
to name them. 
7. Generic names derived from barbarous languages ought 
on no account to be admitted. 
8. Generic names compounded of two entire words are 
improper, and ought to be excluded. Thus, Vitis Idaea must 
give way to Vaccinium, and Crista Galli to Rhinanthus. 
9. Generic names formed of two Latin words, are scarcely 
tolerable : some of them have been admitted, such as Cornu- 
copice^ Rosmarinus, Semi^ervivum, &c., but this example is not 
to be imitated. 
10. Generic names, formed half of Latin and half of Greek, 
are hybrid, and on no account to be admitted : such are 
CaYdaminduniy Chrysanthemmc/ww, &c. 
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