LAWS OF NOMENCLATURE. 21 



For this purpose the most striking are treated as 

 subspecies, and when constant from seed, they are 

 called races [proles). 



Modifications of a secondary order take the name of 

 varieties, and if there be no doubt as to their almost 

 constant heredity by seed, they are termed subraces 

 [subproles). 



Modifications of minor importance, more or less 

 comparable to subvarieties, variations or subvariations 

 of uncultivated species, are indicated according to 

 their origin iathe following manner : — 1. Satus (seed- 

 ling ; Gall, semis ; Germ. Samling), for a form obtained 

 from seed. 2. Mistus (blending ;' Gall, metis ; Germ. 

 Blendlinge), for a form arising from cross-fertilization 

 in a species. 3. Lusus (sport; Germ. Spielart), for a 

 form originating from a leaf-bud or from any other 

 organ, and propagated by division. 



CHAPTEE III. 



on the manner of designating each group or 

 association of plants. 



Section 1. 



deneral Principles. 



Art. 15. Each natural group of plants can bear in 

 science but one valid designation, namely, the most 

 ancient, whether adopted or given by Linnaeus, or 



' Since tlie meeting of the Congress, the author of this pamphlet 

 has, together with the translator, turned his attention to the choice of a 

 significant English term for the French metis". The word blending does 

 not perhaps indicate quite clearly enough the existence of a mixture, and 

 does not allude to its nature. The term half-hreed, used by agriculturists, 



