May 1904] 
New Ge 7 iera of Fungi 
149 
tissue; they may assume such forms as the tree-like Sea-weeds 
exhibit; still another direction in which the differentiation pro¬ 
ceeds is shown in the Toadstools which have an underground 
part simulating a root, an erect cylindrical stem and umbrella-like 
cap. In all these cases the hyphae can readily be detected as the 
units or anatomical components of the plant body. To such a 
mass of hyphae the term My-ce’-li-um has been applied. The 
Mycelium may be sparse and loose, or it may be abundant, floccu- 
lent, felt-like, or even compacted into more or less dense tissue. 
The difference in manner of development as wll as structure of 
the compact mycelium — which is sometimes called pseudo-par- 
en-chy-ma — and the true or ordinary tissue can be easily de¬ 
tected. In case of true tissue, such as found in all the common 
higher plants, a single cell divides into two, these two divide and 
so the process continues — the resultant cells quickly growing 
to the normal size — and so an extended mass of cells is formed, 
which are coherent and more or less firm constituting what is 
called true tissue; the word par-en’-chy-ma is sometimes applied 
to such a structure. The cells may now assume different shapes 
in different parts of the mass — in other words, differentiation to 
greater or less extent may take place. But in case of mycelium a 
single hypha only, sinple or with subsequently formed septa, may 
be present; but even if the hyphae are numerous and the com¬ 
ponent cells abundant and more or less compacted, they may, un¬ 
der the microscope, be readily unraveled and thus the origin of 
the false tissue (pseu’-do-par-en’-chy-ma) demonstrated. 
(To be Continued.) 
NEW GENERA OF FUNGI PUBLISHED SINCE THE 
YEAR 1900, WITH CITATION AND ORIGINAL 
DESCRIPTIONS. 
COMPILED BY W. A. KELLERMAN AND P. L. RICKER. 
The widely scattered, oftentimes practically inaccessible lit¬ 
erature containing New Genera of Fungi has suggested the de¬ 
sirability of collecting the descriptions and reprinting them ver¬ 
batim, with full citations, in one periodical for the convenience of 
the large and rapidly growing number of American workers. 
The first installment is herewith presented, covering the period 
1901-1903, and will be completed in the following No. of the 
Journal. 
At intervals of a few months supplemental installments will 
be given and will, like this, be printed also as Separates — the 
alternate pages being left blank. 
A card index can be readily made, if desired, which of course 
would be useful to workers, and indispensable in the large sci¬ 
entific libraries. 
