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DRIEFER ARTICLES, 
SOME ERRONEOUS REFERENCES. 
In 1794 C. H. Persoon published in Roemer’s ewes Magazin fiir 
de Botanik an important article that seems to have been almost 
entirely overlooked. It begins on page 63 under the title, Meuer 
Versuch einer systematischen Eintheilung der Schwémme, and is con- 
tinued, pages 81-128, as Dispositio Methodica Fungorum, with four 
plates. This latter part was reprinted and considerably extended 
in 1797 as Zentamen Dispositionts Methodicae Fungorum. This work, 
from pages 1 to 48, is an exact copy of the 1794 article, so that any- 
One possessing the Zenfamen can give the correct reference to the 
original publication by simply adding 80 to the page number of any 
of the first 48 pages. The parts in the 1797 work that are new are the 
title-page, preface, and pages 49 to 76. The plates are the same. 
References for original descriptions in the main part of the Zen- 
famen should therefore be made to the 1794 paper instead. For 
Puccinia graminis and £. Circaeae, instead of 1797, as always given, the 
correct date is 1794, which is also the date of the original descrip- 
tion of the genus Uredo, instead of 1795 as given in Saccardo’s Sy//oge 
fungorum and in Pfeiffer’s Vomenclator Botanicus. 
C. H. Persoon also contributed ten species of Aecidium to Gmelin’s 
edition of Linne, Syst. Wat. 1791, and his name follows the descrip- 
tions. So we should write, for example, Aecidium Euphorbiae Pers.; 
Not Aecidium Euphorbiae Gmel. In Usteri’s Annalen der Botanik for 
1796, pt. 19, p. 43, Persoon speaks of having contributed to Gmelin’s 
€dition of this work. The date of these species is sometimes given as 
1796, which comes from reference to Gmelin’s edition of Linne, 
Syst. Veg., a work that is identical page for page, so far as the volume 
containing the fungi is concerned, with the earlier Sys¢. Vaz., except 
in the title- -page. 
In Hist. Fisica y Politica de Chile 8: 43, 1852, Montagne describes 
Puccinia Malvacearum Bertero, not P. Malvacearum Mont. as always 
written. That Montagne intended this is shown by his adding: ‘Solo 
me pertenecen el diagnosis y la descripcion.” 
Igor] 421 
