236 ERYTHEA. 
Baron F. yon Mueller relates to such thistles and their 
allies as are included within the provisions of the Thistle 
Act of 1890. These plants are all species of European 
origin, and without exception have also proved obnoxious 
in America. In several of the older states of the Union, 
there have been legislative enactments looking to the exter- 
mination of introduced weeds of this tribe. 
Tar eminent American dendrologist, Prof. CG. S. Sargent, 
whose good services in the cause of correct nomenclature 
have been everywhere recognized, has newly discovered that 
Halesia, long in use for certain American shrubs, is but a 
homonym, and in a recent issue of Garden and Forest (Vol. 
vi, p. 434) has offered MouriAas a substitute. In this choice 
he does not discover that he has made another homonym; but 
this is certainly the case; for, as a spoken name—and the 
language of plant nomenclature is unquestionably a spoken 
language—Mohria is identical with Morea, a name already 
twice employed, first by Medicus and afterwards by Salisbury. 
Had Prof. Sargent written Carlomohria he would have given 
us a tenable generic name; and we have no doubt that this, 
which would be our name for the genus, will have to be 
adopted. It is to be regretted that this perfectly unquestion- 
able and thoroughly appropriate name, as fitly commemorating 
Dr. Charles Mohr’s services to botany, did not suggest itself 
to our friend before he had transferred the species. Another 
transfer is now called for, and this when done must send 
another set of binomials—those made under Mohria—into 
the ever increasing store of silent synonyms.—E. L. G 
