1910) BRIEFER ARTICLES 223 
FUNGI WITH PLEOMORPHIC LIFE CYCLE.—1. The different successive 
stages of the fungi with pleomorphic life cycle (anamorphoses, status) 
can bear only a single generic and specific name (binome); that is to say, 
the oldest, from the starting point of the nomenclature of the fungi, which 
has been applied to the perfect. stage, provided that in other respects it 
- conforms to the rules. 
2. For the purpose of nomenclature it is agreed that the perfect stage 
of fungi with pleomorphic life cycle is that which bears the ascus in the 
Ascomycetes, the basidium in the Basidiomycetes, the teleutospore in the 
Uredinales, and the spore in the Ustilaginales. 
3. Generic or specific names applied to imperfect stages may not be 
used to replace a name applied to one or more species, any one of which 
contains the perfect stage. 
Citations of pre-Friesian or of pre-Persoonian names follow the rule. 
Examples: Boletus edulis Fries, not B. edulis Bull.; Polyporus ovinus 
Fries, not P. ovinus (Schaeff.) Fries. Writers who prefer, however, may 
Write Boletus edulfs Fries ex Bull.; Polyporus ovinus Fries ex. Schaeff., 
etc. Se 
It is recommended in the case of biological species (formes speciales) 
among the rusts that authors who prefer to employ double names take them 
from the names of the host plants. A recommendation which was offered 
as applying to the fungi, namely that when a new genus is published, if 
there are more than one species the author should cite one as the type 
species, or if only one species, that one to be regarded as the type of the 
genus, was adopted and made to apply to all plants. 
The expression of opinion on the desirability of having extensive lists 
of genera conservanda was so strong that it was practically unanimous, and 
commissions were appointed to prepare such lists in the fungi, lichens, 
algae, mosses, and liverworts, : 
The following action was taken in regard to genera conservanda in 
the Pteridophytes, and additional ones in the Spermatophytes presented 
for consideration at Brussels. Selaginella was placed among the ponerse 
conservanda, while the remaining genera in the proposed list of Pterido- 
phytes were rejected. 
A commission, which had been appointed for the purpose in advance 
of the congress, carefully considered the additional genera conservanda 
among the Spermatophytes in the list proposed by JANCHEN, and chips 
mended that 21 or 22 names be stricken out. The list as amended, with 
the addition of the name Welwitschia, was adopted. : 
The motion to amend the Vienna rules by striking out the clause requir- 
eco 
