5 
Mycelium. —The liyplue rapidly penetrate the artificial substratum, 
giving it a dark appearance by their presence. They are 2 - 6 in 
diameter, with frequent septa, and filled with oil globules, which give 
them a guttulate appearance. The globules are present in such quan¬ 
tities that they issue from the broken hypliae tips under the cover glass 
and rise to the surface in large numbers. They give the characteristic 
reaction with osmic acid, are present in natural as well as artificial 
media, and seem to be more abundant and of larger size in half starved 
portions than in rapidly growing parts, as noticed by Naegeli* * * § and Cun¬ 
ningham t in various species of fungi. 
Simultaneously with the do wnward growth of thehyphoe into the sub¬ 
stratum there rise to the surface specialized branches, which perform 
the office of sporophores. These long, multiseptate branches, which 
we may term the primary sporophores, are G0-160yu long by 6-7/* in 
greatest diameter, generally somewhat fusiform in shape, and with the 
exception of the lighter colored tips, which reach the surface of the 
medium, are of the greenish brown color of the remainder of the thallus. 
Hyaline , or microconidia. —From the slightly colored tips of these 
sporophores hyaline conidia are produced immediately after they arrive 
at the surface of the substratum. These hyaline conidia correspond in 
a measure to the micro-conidia of Nectria and Hyphomyces , but owing to 
the impropriety in the use of the term pointed out by Eeinke and 
Berthold,! the term hyaline will be used to avoid ambiguity. 
The method of spore formation by which these conidia are produced 
resembles quite closely that observed by Unger § in the case of Graphium 
penicilloides , Corda, now called Chalara Unyeri , Sacc., and in a less de¬ 
gree that of the new genus Endoconidium recently described and figured 
by Prillieux and Delacroix in the last fascicle of the Bulletin de la Societe 
Mycologique de France.|| In regard to the spore formation of Chalara 
TJngeri , Sacc., found growing on pine and fir timber in the forests of 
Austria, Unger remarks :§ 
Upon still greater magnification (Fig. 4) it is seen that the brown apices are only 
the sheaths of fine cylindrical cells from which terminal segments, bound together in 
a thread-like manuer, are abjointed aud pushed out. There is no doubt that these 
latter have the significance of brood cells, although they possess a great similarity to 
the spores of certain species of Tor ala. 
The figure given by Unger represents quite plainly the abjunction of 
the conidium within the end of the hypha in a manner precisely similar 
to that shown in Plate ii, Fig. 1. It differs, however, from the other 
* Sitzungsberichte der Iv. Akademie zu Miincken, 1879. 
t Quarterly Journal Microscopical Society, xx, 1880. 
+ Reinke and Berthokl, Die Zersetzung der Kartoffeln durch Pilze, 1879. 
§ Botauische Zeitung, 1847, Nr. 15, T. iv. 
|| Prillieux and Delacroix, Endoconidium iemulentum, nov. gen. nov. spec. Cham¬ 
pignon donuant au seigle des propriety v6u6neuses. Bulletin de la Soci6t6 Myco¬ 
logique de France, Tome vn, 2 e Fasicule, p. 116. / 
