26 
HOST-INDEX OF U.S. FUNGI* 
We have before ns the third and final part of this work, 
which will doubtless prove of considerable value to the 
mycologists of America. It may be taken for granted that any 
work associated with the name of Professor W. G. Farlow will 
be carefully and conscientiously executed. In Europe such 
indices are not numerous, and certainly not up to date. 
Westendorp constructed a small general Index in 1854 to 1865, 
and subsequently C. Poumeguere (in 1870) issued a similar 
work, but neither of these are sufficiently complete now to be 
of much service. It is matter of opinion whether it serves any 
useful purpose to include, for instance, Cladosporium herbarum 
over and over again, upon different hosts, when it is common 
to so many, and special to none. The difficulty is in drawing 
the line of exclusion, and yet. no one would regard Corticium 
Iceve or Poria vaporaria as confined, or even having a predi- 
lection for any single host. 
In the present list an advance is made on its predecessors in 
including the recent synonyms, and especially those adopted 
by Saccardo in his “Sylloge.” How this has been done may be 
gathered from the following reprint of the supplementary 
names given in the Appendix for 
PYSIUS MALUS, L. 
Agaricus adiposus, Fr. 
j Agaricus pulvinatus, P. 
( Pleurotus pulvinatus, Sacc. 
Ceratostomella mali, Ell. Ev. 
Cercospora mali, Ell. Ev. 
Clitopilus conissans, Pic. 
Didymella mali, Ell. Ev. 
Entomo’sporium maculatum, Lev. 
( Gloeosporium fructigenum, B. 
iGloeosporium versicolor, B. C. 
Hendersonia foliorum, Fckl. 
Hendersonia mali, Thum. 
Hypoxylon Morsei, B. G. 
(Monilia fructigena, P. 
XOidium fructigenum, Kze. & S. 
NeCtria mammoidea, P. $ Plow. 
Ozonium auricomum, Lh. 
( Peziza inquinans, Cke. 
iPatinella inquinans, Sacc. 
( Peziza regalis, C. & E. 
yPezizella regalis, Sacc. 
Phoma piricola, Ell. 8f Ev. 
Phyllosticta pirina, Sacc. 
( Podosphcera Kunzei, Lev. 
iPodosphaera oxy acanthi, ( B.C .) 
* “ A Provisional Host-Index of the Fungi of the United States,” by W. 
G. Farlow and A. B. Seymour, 1891. 
